| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271 | <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>
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