| <template> | 
|     <view class="u-radio" :style="[radioStyle]"> | 
|         <view class="u-radio__icon-wrap" @tap="toggle" :class="[iconClass]" :style="[iconStyle]"> | 
|             <u-icon | 
|                 class="u-radio__icon-wrap__icon" | 
|                 name="checkbox-mark" | 
|                 :size="elIconSize"  | 
|                 :color="iconColor"/> | 
|         </view> | 
|         <view class="u-radio__label" @tap="onClickLabel" :style="{ | 
|             fontSize: $u.addUnit(labelSize) | 
|         }"> | 
|             <slot /> | 
|         </view> | 
|     </view> | 
| </template> | 
|   | 
| <script> | 
|     /** | 
|      * radio 单选框 | 
|      * @description 单选框用于有一个选择,用户只能选择其中一个的场景。搭配u-radio-group使用 | 
|      * @tutorial https://www.uviewui.com/components/radio.html | 
|      * @property {String Number} icon-size 图标大小,单位rpx(默认24) | 
|      * @property {String Number} label-size label字体大小,单位rpx(默认28) | 
|      * @property {String Number} name radio组件的标示符 | 
|      * @property {String} shape 形状,见上方说明(默认circle) | 
|      * @property {Boolean} disabled 是否禁用(默认false) | 
|      * @property {Boolean} label-disabled 点击文本是否可以操作radio(默认true) | 
|      * @property {String} active-color 选中时的颜色,如设置parent的active-color将失效 | 
|      * @event {Function} change 某个radio状态发生变化时触发(选中状态) | 
|      * @example <u-radio :label-disabled="false">门掩黄昏,无计留春住</u-radio> | 
|      */ | 
|     export default { | 
|         name: "u-radio", | 
|         props: { | 
|             // radio的名称 | 
|             name: { | 
|                 type: [String, Number], | 
|                 default: '' | 
|             }, | 
|             // 形状,square为方形,circle为原型 | 
|             shape: { | 
|                 type: String, | 
|                 default: '' | 
|             }, | 
|             // 是否禁用 | 
|             disabled: { | 
|                 type: [String, Boolean], | 
|                 default: '' | 
|             }, | 
|             // 是否禁止点击提示语选中复选框 | 
|             labelDisabled: { | 
|                 type: [String, Boolean], | 
|                 default: '' | 
|             }, | 
|             // 选中状态下的颜色,如设置此值,将会覆盖parent的activeColor值 | 
|             activeColor: { | 
|                 type: String, | 
|                 default: '' | 
|             }, | 
|             // 图标的大小,单位rpx | 
|             iconSize: { | 
|                 type: [String, Number], | 
|                 default: '' | 
|             }, | 
|             // label的字体大小,rpx单位 | 
|             labelSize: { | 
|                 type: [String, Number], | 
|                 default: '' | 
|             }, | 
|         }, | 
|         data() { | 
|             return { | 
|                 // 父组件的默认值,因为头条小程序不支持在computed中使用this.parent.shape的形式 | 
|                 // 故只能使用如此方法 | 
|                 parentData: { | 
|                     iconSize: null, | 
|                     labelDisabled: null, | 
|                     disabled: null, | 
|                     shape: null, | 
|                     activeColor: null, | 
|                     size: null, | 
|                     width: null, | 
|                     height: null, | 
|                     value: null, | 
|                     wrap: null | 
|                 } | 
|             }; | 
|         }, | 
|         created() { | 
|             this.parent = false; | 
|             // 支付宝小程序不支持provide/inject,所以使用这个方法获取整个父组件,在created定义,避免循环引用 | 
|             this.updateParentData(); | 
|             this.parent.children.push(this); | 
|         }, | 
|         computed: { | 
|             // 是否禁用,如果父组件u-raios-group禁用的话,将会忽略子组件的配置 | 
|             elDisabled() { | 
|                 return this.disabled !== '' ? this.disabled : this.parentData.disabled !== null ? this.parentData.disabled : false; | 
|             }, | 
|             // 是否禁用label点击 | 
|             elLabelDisabled() { | 
|                 return this.labelDisabled !== '' ? this.labelDisabled : this.parentData.labelDisabled !== null ? this.parentData.labelDisabled : false; | 
|             }, | 
|             // 组件尺寸,对应size的值,默认值为34rpx | 
|             elSize() { | 
|                 return this.size ? this.size : (this.parentData.size ? this.parentData.size : 34); | 
|             }, | 
|             // 组件的勾选图标的尺寸,默认20 | 
|             elIconSize() { | 
|                 return this.iconSize ? this.iconSize : (this.parentData.iconSize ? this.parentData.iconSize : 20); | 
|             }, | 
|             // 组件选中激活时的颜色 | 
|             elActiveColor() { | 
|                 return this.activeColor ? this.activeColor : (this.parentData.activeColor ? this.parentData.activeColor : 'primary'); | 
|             }, | 
|             // 组件的形状 | 
|             elShape() { | 
|                 return this.shape ? this.shape : (this.parentData.shape ? this.parentData.shape : 'circle'); | 
|             }, | 
|             // 设置radio的状态,要求radio的name等于parent的value时才为选中状态 | 
|             iconStyle() { | 
|                 let style = {}; | 
|                 if (this.elActiveColor && this.parentData.value == this.name && !this.elDisabled) { | 
|                     style.borderColor = this.elActiveColor; | 
|                     style.backgroundColor = this.elActiveColor; | 
|                 } | 
|                 style.width = this.$u.addUnit(this.elSize); | 
|                 style.height = this.$u.addUnit(this.elSize); | 
|                 return style; | 
|             }, | 
|             iconColor() { | 
|                 return this.name ==  this.parentData.value ? '#ffffff' : 'transparent'; | 
|             }, | 
|             iconClass() { | 
|                 let classes = []; | 
|                 classes.push('u-radio__icon-wrap--' + this.elShape); | 
|                 if (this.name == this.parentData.value) classes.push('u-radio__icon-wrap--checked'); | 
|                 if (this.elDisabled) classes.push('u-radio__icon-wrap--disabled'); | 
|                 if (this.name == this.parentData.value && this.elDisabled) classes.push( | 
|                     'u-radio__icon-wrap--disabled--checked'); | 
|                 // 支付宝小程序无法动态绑定一个数组类名,否则解析出来的结果会带有",",而导致失效 | 
|                 return classes.join(' '); | 
|             }, | 
|             radioStyle() { | 
|                 let style = {}; | 
|                 if (this.parentData.width) { | 
|                     style.width = this.$u.addUnit(this.parentData.width); | 
|                     // #ifdef MP | 
|                     // 各家小程序因为它们特殊的编译结构,使用float布局 | 
|                     style.float = 'left'; | 
|                     // #endif | 
|                     // #ifndef MP | 
|                     // H5和APP使用flex布局 | 
|                     style.flex = `0 0 ${this.$u.addUnit(this.parentData.width)}`; | 
|                     // #endif | 
|                 } | 
|                 if (this.parentData.wrap) { | 
|                     style.width = '100%'; | 
|                     // #ifndef MP | 
|                     // H5和APP使用flex布局,将宽度设置100%,即可自动换行 | 
|                     style.flex = '0 0 100%'; | 
|                     // #endif | 
|                 } | 
|                 return style; | 
|             } | 
|         }, | 
|         methods: { | 
|             updateParentData() { | 
|                 this.getParentData('u-radio-group'); | 
|             }, | 
|             onClickLabel() { | 
|                 if (!this.elLabelDisabled && !this.elDisabled) { | 
|                     this.setRadioCheckedStatus(); | 
|                 } | 
|             }, | 
|             toggle() { | 
|                 if (!this.elDisabled) { | 
|                     this.setRadioCheckedStatus(); | 
|                 } | 
|             }, | 
|             emitEvent() { | 
|                 // u-radio的name不等于父组件的v-model的值时(意味着未选中),才发出事件,避免多次点击触发事件 | 
|                 if(this.parentData.value != this.name) this.$emit('change', this.name); | 
|             }, | 
|             // 改变组件选中状态 | 
|             // 这里的改变的依据是,更改本组件的parentData.value值为本组件的name值,同时通过父组件遍历所有u-radio实例 | 
|             // 将本组件外的其他u-radio的parentData.value都设置为空(由computed计算后,都被取消选中状态),因而只剩下一个为选中状态 | 
|             setRadioCheckedStatus() { | 
|                 this.emitEvent(); | 
|                 if(this.parent) { | 
|                     this.parent.setValue(this.name); | 
|                     this.parentData.value = this.name; | 
|                 } | 
|             } | 
|         } | 
|     }; | 
| </script> | 
|   | 
| <style lang="scss" scoped> | 
|     @import "../../libs/css/style.components.scss"; | 
|   | 
|     .u-radio { | 
|         /* #ifndef APP-NVUE */ | 
|         display: inline-flex; | 
|         /* #endif */ | 
|         align-items: center; | 
|         overflow: hidden; | 
|         user-select: none; | 
|         line-height: 1.8; | 
|          | 
|         &__icon-wrap { | 
|             color: $u-content-color; | 
|             @include vue-flex; | 
|             flex: none; | 
|             align-items: center; | 
|             justify-content: center; | 
|             box-sizing: border-box; | 
|             width: 42rpx; | 
|             height: 42rpx; | 
|             color: transparent; | 
|             text-align: center; | 
|             transition-property: color, border-color, background-color; | 
|             font-size: 20px; | 
|             border: 1px solid #c8c9cc; | 
|             transition-duration: 0.2s; | 
|              | 
|             /* #ifdef MP-TOUTIAO */ | 
|             // 头条小程序兼容性问题,需要设置行高为0,否则图标偏下 | 
|             &__icon { | 
|                 line-height: 0; | 
|             } | 
|             /* #endif */ | 
|              | 
|             &--circle { | 
|                 border-radius: 100%; | 
|             } | 
|              | 
|             &--square { | 
|                 border-radius: 3px; | 
|             } | 
|              | 
|             &--checked { | 
|                 color: #fff; | 
|                 background-color: #2979ff; | 
|                 border-color: #2979ff; | 
|             } | 
|              | 
|             &--disabled { | 
|                 background-color: #ebedf0; | 
|                 border-color: #c8c9cc; | 
|             } | 
|              | 
|             &--disabled--checked { | 
|                 color: #c8c9cc !important; | 
|             } | 
|         } | 
|          | 
|         &__label { | 
|             word-wrap: break-word; | 
|             margin-left: 10rpx; | 
|             margin-right: 24rpx; | 
|             color: $u-content-color; | 
|             font-size: 30rpx; | 
|              | 
|             &--disabled { | 
|                 color: #c8c9cc; | 
|             } | 
|         } | 
|     } | 
| </style> |