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							- <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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