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| <template>
| <view>
| <view class="tn-read-more-class tn-read-more">
| <!-- 内容 -->
| <view
| :id="elId"
| class="tn-read-more__content"
| :style="[contentStyle]"
| >
| <slot></slot>
| </view>
|
| <!-- 展开收起按钮 -->
| <view
| v-if="isLongContent"
| class="tn-read-more__show-more__wrap"
| :class="{'tn-read-more__show-more': showMore}"
| :style="[innerShadowStyle]"
| @tap="toggleReadMore">
| <text class="tn-read-more__show-more--text" :style="[fontStyle]">{{ showMore ? closeText : openText }}</text>
| <view class="tn-read-more__show-more--icon">
| <view :class="[tipIconClass]" :style="[fontStyle]"></view>
| </view>
| </view>
| </view>
| </view>
| </template>
|
| <script>
| import componentsColorMixin from '../../libs/mixin/components_color.js'
| export default {
| name: 'tn-read-more',
| mixins: [componentsColorMixin],
| props: {
| // 默认占位高度
| showHeight: {
| type: Number,
| default: 400
| },
| // 显示收起按钮
| closeBtn: {
| type: Boolean,
| default: false
| },
| // 展开提示文字
| openText: {
| type: String,
| default: '展开阅读全文'
| },
| // 收起提示文字
| closeText: {
| type: String,
| default: '收起'
| },
| // 展开提示图标
| openIcon: {
| type: String,
| default: 'down'
| },
| // 收起提示图标
| closeIcon: {
| type: String,
| default: 'up'
| },
| // 阴影样式
| shadowStyle: {
| type: Object,
| default () {
| return {
| backgroundImage: "linear-gradient(-180deg, rgba(255, 255, 255, 0) 0%, #fff 80%)",
| paddingTop: "300rpx",
| marginTop: "-300rpx"
| }
| }
| },
| // 组件标识
| index: {
| type: [Number, String],
| default: ''
| }
| },
| computed: {
| paramsChange() {
| return `${this.open}-${this.showHeight}`
| },
| contentStyle() {
| let style = {}
| if (this.isLongContent && !this.showMore) {
| style.height = `${this.showHeight}rpx`
| } else {
| if (!this.initHeight) {
| style.height = 'auto'
| } else {
| style.height = `${this.contentHeight}px`
| }
| }
|
| return style
| },
| innerShadowStyle() {
| let style = {}
| // 折叠时才需要阴影样式
| if (!this.showMore) {
| style = Object.assign(style, this.shadowStyle)
| }
|
| return style
| },
| fontStyle() {
| let style = {}
| style.color = this.fontColorStyle ? this.fontColorStyle : '#01BEFF'
| style.fontSize = this.fontSizeStyle ? this.fontSizeStyle : '28rpx'
|
| return style
| },
| tipIconClass() {
| if (this.showMore) {
| if (this.closeIcon) {
| return `tn-icon-${this.closeIcon}`
| }
| } else {
| if (this.openIcon) {
| return `tn-icon-${this.openIcon}`
| }
| }
| }
| },
| data() {
| return {
| elId: this.$t.uuid(),
| // 标记是否已经初始化高度完成
| initHeight: false,
| // 是否需要隐藏一部分内容
| isLongContent: false,
| // 当前展开的打开、关闭状态
| showMore: false,
| // 内容的高度
| contentHeight: 0
| }
| },
| watch: {
| paramsChange(value) {
| this.initHeight = false
| this.isLongContent = false
| this.showMore = true
| this.$nextTick(() => {
| this.init()
| })
| }
| },
| mounted() {
| this.$nextTick(() => {
| this.init()
| })
| },
| methods: {
| // 初始化组件
| init() {
| // 判断高度，如果真实内容的高度大于占位高度，则显示展开与收起的控制按钮
| this._tGetRect('#' + this.elId).then(res => {
| this.contentHeight = res.height
| this.initHeight = true
| if (res.height > uni.upx2px(this.showHeight)) {
| this.isLongContent = true
| this.showMore = false
| }
| })
| },
| // 展开或者收起内容
| toggleReadMore() {
| this.showMore = !this.showMore
| // 是否显示收起按钮
| if (!this.closeBtn) this.isLongContent = false
|
| this.$emit(this.showMore ? 'open' : 'closed', this.index)
| }
| }
| }
| </script>
|
| <style lang="scss" scoped>
|
| .tn-read-more {
|
| &__content {
| font-size: 28rpx;
| color: $tn-font-color;
| line-height: 1.8;
| text-align: left;
| overflow: hidden;
| transition: all 0.3s linear;
| }
|
| &__show-more {
| padding-top: 0;
| background: none;
| margin-top: 20rpx;
|
| &__wrap {
| position: relative;
| width: 100%;
| display: flex;
| flex-direction: row;
| align-items: center;
| justify-content: center;
| padding-bottom: 26rpx;
| }
|
| &--text {
| display: flex;
| flex-direction: row;
| align-items: center;
| justify-content: center;
| line-height: 1;
| }
|
| &--icon {
| margin-left: 14rpx;
| }
| }
| }
| </style>
|
|
