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<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>
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