| <template> | 
|     <view | 
|         class="u-radio" | 
|         @tap.stop="wrapperClickHandler" | 
|         :style="[radioStyle]" | 
|         :class="[`u-radio-label--${parentData.iconPlacement}`, parentData.borderBottom && parentData.placement === 'column' && 'u-border-bottom']" | 
|     > | 
|         <view | 
|             class="u-radio__icon-wrap" | 
|             @tap.stop="iconClickHandler" | 
|             :class="iconClasses" | 
|             :style="[iconWrapStyle]" | 
|         > | 
|             <slot name="icon"> | 
|                 <u-icon | 
|                     class="u-radio__icon-wrap__icon" | 
|                     name="checkbox-mark" | 
|                     :size="elIconSize" | 
|                     :color="elIconColor" | 
|                 /> | 
|             </slot> | 
|         </view> | 
|         <slot> | 
|             <text | 
|                 class="u-radio__text" | 
|                 @tap.stop="labelClickHandler" | 
|                 :style="{ | 
|                     color: elDisabled ? elInactiveColor : elLabelColor, | 
|                     fontSize: elLabelSize, | 
|                     lineHeight: elLabelSize | 
|                 }" | 
|             >{{label}}</text> | 
|         </slot> | 
|     </view> | 
| </template> | 
|   | 
| <script> | 
|     import props from './props.js'; | 
|     /** | 
|      * 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}    name            radio的名称 | 
|      * @property {String}            shape            形状,square为方形,circle为圆型 | 
|      * @property {Boolean}            disabled        是否禁用 | 
|      * @property {String | Boolean}    labelDisabled    是否禁止点击提示语选中单选框 | 
|      * @property {String}            activeColor        选中时的颜色,如设置parent的active-color将失效 | 
|      * @property {String}            inactiveColor    未选中的颜色 | 
|      * @property {String | Number}    iconSize        图标大小,单位px | 
|      * @property {String | Number}    labelSize        label字体大小,单位px | 
|      * @property {String | Number}    label            label提示文字,因为nvue下,直接slot进来的文字,由于特殊的结构,无法修改样式 | 
|      * @property {String | Number}    size            整体的大小 | 
|      * @property {String}            iconColor        图标颜色 | 
|      * @property {String}            labelColor        label的颜色 | 
|      * @property {Object}            customStyle        组件的样式,对象形式 | 
|      *  | 
|      * @event {Function} change 某个radio状态发生变化时触发(选中状态) | 
|      * @example <u-radio :labelDisabled="false">门掩黄昏,无计留春住</u-radio> | 
|      */ | 
|     export default { | 
|         name: "u-radio", | 
|          | 
|         mixins: [uni.$u.mpMixin, uni.$u.mixin,props], | 
|         data() { | 
|             return { | 
|                 checked: false, | 
|                 // 当你看到这段代码的时候, | 
|                 // 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: 12, | 
|                     labelDisabled: null, | 
|                     disabled: null, | 
|                     shape: null, | 
|                     activeColor: null, | 
|                     inactiveColor: null, | 
|                     size: 18, | 
|                     value: null, | 
|                     iconColor: null, | 
|                     placement: 'row', | 
|                     borderBottom: false, | 
|                     iconPlacement: 'left' | 
|                 } | 
|             } | 
|         }, | 
|         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21px | 
|             elSize() { | 
|                 return this.size ? this.size : (this.parentData.size ? this.parentData.size : 21); | 
|             }, | 
|             // 组件的勾选图标的尺寸,默认12px | 
|             elIconSize() { | 
|                 return this.iconSize ? this.iconSize : (this.parentData.iconSize ? this.parentData.iconSize : 12); | 
|             }, | 
|             // 组件选中激活时的颜色 | 
|             elActiveColor() { | 
|                 return this.activeColor ? this.activeColor : (this.parentData.activeColor ? this.parentData.activeColor : '#2979ff'); | 
|             }, | 
|             // 组件选未中激活时的颜色 | 
|             elInactiveColor() { | 
|                 return this.inactiveColor ? this.inactiveColor : (this.parentData.inactiveColor ? this.parentData.inactiveColor : | 
|                     '#c8c9cc'); | 
|             }, | 
|             // label的颜色 | 
|             elLabelColor() { | 
|                 return this.labelColor ? this.labelColor : (this.parentData.labelColor ? this.parentData.labelColor : '#606266') | 
|             }, | 
|             // 组件的形状 | 
|             elShape() { | 
|                 return this.shape ? this.shape : (this.parentData.shape ? this.parentData.shape : 'circle'); | 
|             }, | 
|             // label大小 | 
|             elLabelSize() { | 
|                 return uni.$u.addUnit(this.labelSize ? this.labelSize : (this.parentData.labelSize ? this.parentData.labelSize : | 
|                     '15')) | 
|             }, | 
|             elIconColor() { | 
|                 const iconColor = this.iconColor ? this.iconColor : (this.parentData.iconColor ? this.parentData.iconColor : | 
|                     '#ffffff'); | 
|                 // 图标的颜色 | 
|                 if (this.elDisabled) { | 
|                     // disabled状态下,已勾选的radio图标改为elInactiveColor | 
|                     return this.checked ? this.elInactiveColor : 'transparent' | 
|                 } else { | 
|                     return this.checked ? iconColor : 'transparent' | 
|                 } | 
|             }, | 
|             iconClasses() { | 
|                 let classes = [] | 
|                 // 组件的形状 | 
|                 classes.push('u-radio__icon-wrap--' + this.elShape) | 
|                 if (this.elDisabled) { | 
|                     classes.push('u-radio__icon-wrap--disabled') | 
|                 } | 
|                 if (this.checked && this.elDisabled) { | 
|                     classes.push('u-radio__icon-wrap--disabled--checked') | 
|                 } | 
|                 // 支付宝,头条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 | 
|                 // #ifdef MP-ALIPAY || MP-TOUTIAO | 
|                 classes = classes.join(' ') | 
|                 // #endif | 
|                 return classes | 
|             }, | 
|             iconWrapStyle() { | 
|                 // radio的整体样式 | 
|                 const style = {} | 
|                 style.backgroundColor = this.checked && !this.elDisabled ? this.elActiveColor : '#ffffff' | 
|                 style.borderColor = this.checked && !this.elDisabled ? this.elActiveColor : this.elInactiveColor | 
|                 style.width = uni.$u.addUnit(this.elSize) | 
|                 style.height = uni.$u.addUnit(this.elSize) | 
|                 // 如果是图标在右边的话,移除它的右边距 | 
|                 if (this.parentData.iconPlacement === 'right') { | 
|                     style.marginRight = 0 | 
|                 } | 
|                 return style | 
|             }, | 
|             radioStyle() { | 
|                 const style = {} | 
|                 if(this.parentData.borderBottom && this.parentData.placement === 'row') { | 
|                     uni.$u.error('检测到您将borderBottom设置为true,需要同时将u-radio-group的placement设置为column才有效') | 
|                 } | 
|                 // 当父组件设置了显示下边框并且排列形式为纵向时,给内容和边框之间加上一定间隔 | 
|                 if(this.parentData.borderBottom && this.parentData.placement === 'column') { | 
|                     // ios像素密度高,需要多一点的距离 | 
|                     style.paddingBottom = uni.$u.os() === 'ios' ? '12px' : '8px' | 
|                 } | 
|                 return uni.$u.deepMerge(style, uni.$u.addStyle(this.customStyle)) | 
|             } | 
|         }, | 
|         mounted() { | 
|             this.init() | 
|         }, | 
|         methods: { | 
|             init() { | 
|                 // 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() | 
|                 if (!this.parent) { | 
|                     uni.$u.error('u-radio必须搭配u-radio-group组件使用') | 
|                 } | 
|                 // 设置初始化时,是否默认选中的状态 | 
|                 this.checked = this.name === this.parentData.value | 
|             }, | 
|             updateParentData() { | 
|                 this.getParentData('u-radio-group') | 
|             }, | 
|             // 点击图标 | 
|             iconClickHandler(e) { | 
|                 this.preventEvent(e) | 
|                 // 如果整体被禁用,不允许被点击 | 
|                 if (!this.elDisabled) { | 
|                     this.setRadioCheckedStatus() | 
|                 } | 
|             }, | 
|             // 横向两端排列时,点击组件即可触发选中事件 | 
|             wrapperClickHandler(e) { | 
|                 this.parentData.iconPlacement === 'right' && this.iconClickHandler(e) | 
|             }, | 
|             // 点击label | 
|             labelClickHandler(e) { | 
|                 this.preventEvent(e) | 
|                 // 如果按钮整体被禁用或者label被禁用,则不允许点击文字修改状态 | 
|                 if (!this.elLabelDisabled && !this.elDisabled) { | 
|                     this.setRadioCheckedStatus() | 
|                 } | 
|             }, | 
|             emitEvent() { | 
|                 // u-radio的checked不为true时(意味着未选中),才发出事件,避免多次点击触发事件 | 
|                 if (!this.checked) { | 
|                     this.$emit('change', this.name) | 
|                     // 尝试调用u-form的验证方法,进行一定延迟,否则微信小程序更新可能会不及时 | 
|                     this.$nextTick(() => { | 
|                         uni.$u.formValidate(this, 'change') | 
|                     }) | 
|                 } | 
|             }, | 
|             // 改变组件选中状态 | 
|             // 这里的改变的依据是,更改本组件的checked值为true,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checked都设置为false(都被取消选中状态),因而只剩下一个为选中状态 | 
|             setRadioCheckedStatus() { | 
|                 this.emitEvent() | 
|                 // 将本组件标记为选中状态 | 
|                 this.checked = true | 
|                 typeof this.parent.unCheckedOther === 'function' && this.parent.unCheckedOther(this) | 
|             } | 
|         } | 
|     } | 
| </script> | 
|   | 
| <style lang="scss" scoped> | 
|     @import "../../libs/css/components.scss"; | 
|     $u-radio-wrap-margin-right:6px !default; | 
|     $u-radio-wrap-font-size:20px !default; | 
|     $u-radio-wrap-border-width:1px !default; | 
|     $u-radio-wrap-border-color: #c8c9cc !default; | 
|     $u-radio-line-height:0 !default; | 
|     $u-radio-circle-border-radius:100% !default; | 
|     $u-radio-square-border-radius:3px !default; | 
|     $u-radio-checked-color:#fff !default; | 
|     $u-radio-checked-background-color:red !default; | 
|     $u-radio-checked-border-color: #2979ff !default; | 
|     $u-radio-disabled-background-color:#ebedf0 !default; | 
|     $u-radio-disabled--checked-color:#c8c9cc !default; | 
|     $u-radio-label-margin-left: 5px !default; | 
|     $u-radio-label-margin-right:12px !default; | 
|     $u-radio-label-color:$u-content-color !default; | 
|     $u-radio-label-font-size:15px !default; | 
|     $u-radio-label-disabled-color:#c8c9cc !default; | 
|      | 
|     .u-radio { | 
|         /* #ifndef APP-NVUE */ | 
|         @include flex(row); | 
|         /* #endif */ | 
|         overflow: hidden; | 
|         flex-direction: row; | 
|         align-items: center; | 
|   | 
|         &-label--left { | 
|             flex-direction: row | 
|         } | 
|   | 
|         &-label--right { | 
|             flex-direction: row-reverse; | 
|             justify-content: space-between | 
|         } | 
|   | 
|         &__icon-wrap { | 
|             /* #ifndef APP-NVUE */ | 
|             box-sizing: border-box; | 
|             // nvue下,border-color过渡有问题 | 
|             transition-property: border-color, background-color, color; | 
|             transition-duration: 0.2s; | 
|             /* #endif */ | 
|             color: $u-content-color; | 
|             @include flex; | 
|             align-items: center; | 
|             justify-content: center; | 
|             color: transparent; | 
|             text-align: center; | 
|             margin-right: $u-radio-wrap-margin-right; | 
|             font-size: $u-radio-wrap-font-size; | 
|             border-width: $u-radio-wrap-border-width; | 
|             border-color: $u-radio-wrap-border-color; | 
|             border-style: solid; | 
|   | 
|             /* #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: $u-radio-line-height; | 
|             } | 
|   | 
|             /* #endif */ | 
|   | 
|             &--circle { | 
|                 border-radius: $u-radio-circle-border-radius; | 
|             } | 
|   | 
|             &--square { | 
|                 border-radius: $u-radio-square-border-radius; | 
|             } | 
|   | 
|             &--checked { | 
|                 color: $u-radio-checked-color; | 
|                 background-color: $u-radio-checked-background-color; | 
|                 border-color: $u-radio-checked-border-color; | 
|             } | 
|   | 
|             &--disabled { | 
|                 background-color: $u-radio-disabled-background-color !important; | 
|             } | 
|   | 
|             &--disabled--checked { | 
|                 color: $u-radio-disabled--checked-color !important; | 
|             } | 
|         } | 
|   | 
|         &__label { | 
|             /* #ifndef APP-NVUE */ | 
|             word-wrap: break-word; | 
|             /* #endif */ | 
|             margin-left: $u-radio-label-margin-left; | 
|             margin-right: $u-radio-label-margin-right; | 
|             color: $u-radio-label-color; | 
|             font-size: $u-radio-label-font-size; | 
|   | 
|             &--disabled { | 
|                 color: $u-radio-label-disabled-color; | 
|             } | 
|         } | 
|     } | 
| </style> |