| <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> |