<template>
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<view class="tn-cropper-class tn-cropper" @touchmove.stop.prevent="stop">
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<image
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v-if="imageUrl"
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:src="imageUrl"
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class="tn-cropper__image"
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:style="{
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width: (imgWidth ? imgWidth : width) + 'px',
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height: (imgHeight ? imgHeight : height) + 'px',
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transitionDuration: (animation ? 0.3 : 0) + 's'
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}"
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mode="widthFix"
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:data-minScale="minScale"
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:data-maxScale="maxScale"
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@load="imageLoad"
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@error="imageLoad"
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@touchstart="wxs.touchStart"
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@touchmove="wxs.touchMove"
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@touchend="wxs.touchEnd"
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></image>
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<view
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class="tn-cropper__wrapper"
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:style="{
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width: width + 'px',
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height: height + 'px',
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borderRadius: isRound ? '50%' : '0'
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}"
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>
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<view
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class="tn-cropper__border"
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:style="{
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border: borderStyle,
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borderRadius: isRound ? '50%' : '0',
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}"
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:prop="props"
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:change:prop="wxs.propsChange"
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:data-width="width"
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:data-height="height"
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:data-windowHeight="systemInfo.windowHeight || 600"
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:data-windowWidth="systemInfo.windowWidth || 400"
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:data-imgTop="imgTop"
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:data-imgWidth="imgWidth"
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:data-imgHeight="imgHeight"
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:data-angle="angle"
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></view>
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</view>
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<canvas
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class="tn-cropper__canvas"
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:style="{
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width: width * scaleRatio + 'px',
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height: height * scaleRatio + 'px'
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}"
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:canvas-id="CANVAS_ID"
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:id="CANVAS_ID"
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:disable-scroll="true"
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></canvas>
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<view
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v-if="!custom"
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class="tn-cropper__tabbar"
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>
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<view class="tn-cropper__tabbar__btn tn-cropper__tabber__cancel" @tap.stop="back">取消</view>
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<view class="tn-cropper__tabbar__rotate" :class="[`tn-icon-${rotateIcon}`]" @tap.stop="setAngle"></view>
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<view class="tn-cropper__tabbar__btn tn-cropper__tabber__confirm" @tap.stop="getCutImage">完成</view>
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</view>
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</view>
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</template>
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<script src="./index.wxs" lang="wxs" module="wxs"></script>
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<script>
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export default {
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name: 'tn-cropper',
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props: {
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// 图片路径
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imageUrl: {
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type: String,
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default: ''
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},
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// 裁剪框高度 px
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height: {
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type: Number,
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default: 280
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},
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// 裁剪框的宽度 px
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width: {
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type: Number,
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default: 280
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},
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// 是否为圆形裁剪框
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isRound: {
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type: Boolean,
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default: false
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},
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// 裁剪框边框样式
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borderStyle: {
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type: String,
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default: '1rpx solid #FFF'
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},
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// 生成的图片尺寸相对于裁剪框的比例
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scaleRatio: {
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type: Number,
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default: 1
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},
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// 裁剪后的图片质量
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// 取值范围为：(0, 1]
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quality: {
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type: Number,
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default: 0.8
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},
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// 是否返回base64(H5默认为base64)
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returnBase64: {
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type: Boolean,
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default: false
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},
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// 图片旋转角度
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rotateAngle: {
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type: Number,
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default: 0
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},
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// 图片最小缩放比
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minScale: {
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type: Number,
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default: 0.5
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},
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// 图片最大缩放比
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maxScale: {
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type: Number,
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default: 2
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},
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// 自定义操作栏(设置后会隐藏默认的底部操作栏)
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custom: {
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type: Boolean,
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default: false
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},
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// 是否在值发生改变的时候开始裁剪
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// custom为true时生效
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startCutting: {
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type: Boolean,
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default: false
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},
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// 裁剪时是否显示loading
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loading: {
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type: Boolean,
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default: true
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},
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// 旋转图片图标
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rotateIcon: {
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type: String,
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default: 'circle-arrow'
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}
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},
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data() {
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return {
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// canvas容器id
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CANVAS_ID: 'tn-cropper-canvas',
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// 移动裁剪超时时间定时器
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TIME_CUT_CENTER: null,
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// canvas容器
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ctx: null,
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// 画布x轴起点
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cutX: 0,
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// 画布y轴起点
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cutY: 0,
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// 图片宽度
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imgWidth: 0,
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// 图片高度
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imgHeight: 0,
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// 图片底部位置
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imgTop: 0,
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// 图片左边位置
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imgLeft: 0,
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// 图片缩放比
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scale: 1,
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// 图片旋转角度
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angle: 0,
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// 开启动画过渡效果
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animation: false,
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// 动画定时器
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animationTime: null,
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// 系统信息
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systemInfo: {},
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// 传递的参数
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props: '',
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// 标记是否发生改变
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sizeChange: 0,
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angleChange: 0,
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resetChange: 0,
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centerChange: 0
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}
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},
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watch: {
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imageUrl(val) {
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this.imageReset()
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this.showLoading()
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uni.getImageInfo({
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src: val,
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success: (res) => {
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// 计算图片尺寸
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this.imgComputeSize(res.width, res.height)
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this.angleChange++
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this.props = `3,${this.angleChange}`
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},
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fail: (err) => {
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console.log(err);
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this.imgComputeSize()
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this.angleChange++
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this.props = `3,${this.angleChange}`
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}
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})
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},
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rotateAngle(val) {
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this.animation = true
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this.angle = val
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this.angleChanged(val)
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},
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animation(val) {
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clearTimeout(this.animationTime)
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if (val) {
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this.animationTime = setTimeout(() => {
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this.animation = false
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}, 200)
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}
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},
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startCutting(val) {
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if (this.custom && val) {
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this.getCutImage()
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}
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}
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},
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mounted() {
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this.systemInfo = uni.getSystemInfoSync()
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this.imgTop = this.systemInfo.windowHeight / 2
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this.imgLeft = this.systemInfo.windowWidth / 2
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this.ctx = uni.createCanvasContext(this.CANVAS_ID, this)
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// 初始化
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this.$nextTick(() => {
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this.props = '1,1'
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})
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setTimeout(() => {
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this.$emit('ready', {})
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}, 200)
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},
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methods: {
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// 将网络图片转换为本地图片【同步执行】
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async getLocalImage(url) {
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return await new Promise((resolve, reject) => {
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uni.downloadFile({
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url: url,
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success: (res) => {
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resolve(res.tempFilePath)
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},
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fail: (err) => {
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reject(false)
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}
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})
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})
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},
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// 返回裁剪后的图片信息
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getCutImage() {
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if (!this.imageUrl) {
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uni.showToast({
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title: '请选择图片',
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icon: 'none'
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})
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return
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}
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this.loading && this.showLoading()
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const draw = async () => {
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// 图片实际大小
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let imgWidth = this.imgWidth * this.scale * this.scaleRatio
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let imgHeight = this.imgHeight * this.scale * this.scaleRatio
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// canvas和图片的相对距离
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let xpos = this.imgLeft - this.cutX
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let ypos = this.imgTop - this.cutY
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let imgUrl = this.imageUrl
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// #ifdef APP-PLUS || MP-WEIXIN
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if (~this.imageUrl.indexOf('https:')) {
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imgUrl = await this.getLocalImage(this.imageUrl)
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}
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// #endif
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// 旋转画布
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this.ctx.translate(xpos * this.scaleRatio, ypos * this.scaleRatio)
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// 如果时圆形则截取圆形
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if (this.isRound) {
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const r = this.width > this.height ? Math.floor(this.height / 2) : Math.floor(this.width / 2)
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let translateX = Math.floor(this.width / 2)
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let translateY = Math.floor(this.height / 2)
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this.ctx.beginPath()
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this.ctx.arc(translateX - (xpos * this.scaleRatio), translateY - (ypos * this.scaleRatio), r, 0, (360 * Math.PI) / 180)
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this.ctx.closePath()
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this.ctx.stroke()
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this.ctx.clip()
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}
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this.ctx.rotate((this.angle * Math.PI) / 180)
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this.ctx.drawImage(imgUrl, -imgWidth / 2, -imgHeight / 2, imgWidth, imgHeight)
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// 清空后再继续绘制
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this.ctx.draw(false, () => {
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let params = {
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width: this.width * this.scaleRatio,
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height: Math.round(this.height * this.scaleRatio),
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destWidth: this.width * this.scaleRatio,
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destHeight: Math.round(this.height) * this.scaleRatio,
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fileType: 'png',
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quality: this.quality
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}
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let data = {
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url: '',
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base64: '',
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width: this.width * this.scaleRatio,
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height: this.height * this.scaleRatio
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}
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// #ifdef MP-ALIPAY
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if (this.returnBase64) {
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this.ctx.toDataURL(params).then((urlData) => {
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data.base64 = urlData
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this.loading && uni.hideLoading()
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this.$emit('cropper', data)
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})
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} else {
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this.ctx.toTempFilePath({
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...params,
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success: (res) => {
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data.url = res.apFilePath
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this.loading && uni.hideLoading()
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this.$emit('cropper', data)
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}
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})
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}
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// #endif
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let base64Flag = this.returnBase64
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// #ifndef MP-ALIPAY
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// #ifdef MP-BAIDU || MP-TOUTIAO || H5
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base64Flag = false
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// #endif
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if (base64Flag) {
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uni.canvasGetImageData({
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canvasId: this.CANVAS_ID,
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x: 0,
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y: 0,
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width: this.width * this.scaleRatio,
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height: Math.round(this.height * this.scaleRatio),
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success: (res) => {
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const arrayBuffer = new Uint8Array(res.data)
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const base64 = uni.arrayBufferToBase64(arrayBuffer)
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data.base64 = base64
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this.loading && uni.hideLoading()
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this.$emit('cropper', data)
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}
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}, this)
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} else {
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uni.canvasToTempFilePath({
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...params,
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canvasId: this.CANVAS_ID,
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success: (res) => {
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data.url = res.tempFilePath
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// #ifdef H5
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data.base64 = res.tempFilePath
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// #endif
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this.loading && uni.hideLoading()
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this.$emit('cropper', data)
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}
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}, this)
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}
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// #endif
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})
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}
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draw()
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},
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// 修改图片后触发的函数
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change(e) {
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this.cutX = e.cutX || 0
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this.cutY = e.cutY || 0
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this.imgWidth = e.imgWidth || this.imgWidth
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this.imgHeight = e.imgHeight || this.imgHeight
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this.scale = e.scale || 1
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this.angle = e.angle || 0
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this.imgTop = e.imgTop || 0
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this.imgLeft = e.imgLeft || 0
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},
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// 重置图片
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imageReset() {
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this.scale = 1
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this.angle = 0
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let systemInfo = this.systemInfo.windowHeight ? this.systemInfo : uni.getSystemInfoSync()
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this.imgTop = systemInfo.windowHeight / 2
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this.imgLeft = systemInfo.windowWidth / 2
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this.resetChange++
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this.props = `4,${this.resetChange}`
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// 初始旋转角度
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this.$emit('initAngle', {})
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},
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// 图片的生成的尺寸
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imgComputeSize(width, height) {
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// 默认按图片的最小边 = 对应的裁剪框尺寸
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let imgWidth = width,
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imgHeight = height;
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if (imgWidth && imgHeight) {
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if (imgWidth / imgHeight > this.width / this.height) {
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imgHeight = this.height
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imgWidth = (width / height) * imgHeight
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} else {
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imgWidth = this.width
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imgHeight = (height / width) * imgWidth
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}
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} else {
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let systemInfo = this.systemInfo.windowHeight ? this.systemInfo : uni.getSystemInfoSync()
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imgWidth = systemInfo.windowWidth
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imgHeight = 0
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}
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this.imgWidth = imgWidth
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this.imgHeight = imgHeight
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this.sizeChange++
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this.props = `2,${this.sizeChange}`
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},
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// 图片加载完毕
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imageLoad(e) {
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this.imageReset()
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uni.hideLoading()
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this.$emit('imageLoad', {})
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},
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// 移动结束
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moveStop() {
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clearTimeout(this.TIME_CUT_CENTER)
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this.TIME_CUT_CENTER = setTimeout(() => {
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this.centerChange++
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this.props = `5,${this.centerChange}`
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}, 688)
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},
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// 移动中
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moveDuring() {
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clearTimeout(this.TIME_CUT_CENTER)
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},
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// 显示加载框
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showLoading() {
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uni.showLoading({
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title: '请稍等......',
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mask: true
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})
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},
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// 停止
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stop() {},
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// 取消/返回
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back() {
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uni.navigateBack()
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},
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// 角度改变
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angleChanged(val) {
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this.moveStop()
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if (val % 90) {
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this.angle = Math.round(val / 90) * 90
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}
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this.angleChange++
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this.props = `3,${this.angleChange}`
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},
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// 设置角度
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setAngle() {
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this.animation = true
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this.angle = this.angle + 90
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this.angleChanged(this.angle)
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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.tn-cropper {
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width: 100vw;
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height: 100vh;
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background: linear-gradient(-120deg, #F15BB5, #9A5CE5, #01BEFF, #00F5D4);
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// background: linear-gradient(-120deg, #9A5CE5, #01BEFF, #00F5D4, #43e97b);
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// background: linear-gradient(-120deg,#c471f5, #ec008c, #ff4e50,#f9d423);
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// background: linear-gradient(-120deg, #0976ea, #c471f5, #f956b6, #ea7e0a);
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position: fixed;
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top: 0;
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left: 0;
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z-index: 1;
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&__image {
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width: 100%;
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border-style: none;
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position: absolute;
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top: 0;
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left: 0;
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z-index: 2;
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-webkit-backface-visibility: hidden;
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backface-visibility: hidden;
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transform-origin: center;
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}
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&__canvas {
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position: fixed;
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z-index: 10;
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left: -2000px;
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top: -2000px;
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pointer-events: none;
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}
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&__wrapper {
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position: fixed;
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z-index: 4;
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left: 50%;
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top: 50%;
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transform: translate(-50%, -50%);
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border: 3000px solid rgba(0, 0, 0, 0.55);
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pointer-events: none;
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box-sizing: content-box;
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}
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&__border {
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position: absolute;
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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box-sizing: border-box;
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pointer-events: none;
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}
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&__tabbar {
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width: 100%;
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height: 120rpx;
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padding: 0 40rpx;
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box-sizing: border-box;
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position: fixed;
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left: 0;
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bottom: 0;
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z-index: 99;
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display: flex;
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align-items: center;
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justify-content: space-between;
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color: #FFFFFF;
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font-size: 32rpx;
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&::after {
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content: '';
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position: absolute;
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top: 0;
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right: 0;
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left: 0;
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border-top: 1rpx solid rgba(255, 255, 255, 0.2);
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-webkit-transform: scaleY(0.5) translateZ(0);
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transform: scaleY(0.5) translateZ(0);
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transform-origin: 0 100%;
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}
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&__btn {
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height: 80rpx;
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display: flex;
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align-items: center;
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}
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&__rotate {
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width: 44rpx;
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height: 44rpx;
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font-size: 40rpx;
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text-align: center;
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}
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}
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}
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</style>
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