276 lines
		
	
	
		
			7.7 KiB
		
	
	
	
		
			Vue
		
	
	
	
			
		
		
	
	
			276 lines
		
	
	
		
			7.7 KiB
		
	
	
	
		
			Vue
		
	
	
	
| <template>
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| 	<view class="u-rate" :id="elId" @touchmove.stop.prevent="touchMove">
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| 		<view class="u-star-wrap" v-for="(item, index) in count" :key="index" :class="[elClass]">
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| 			<u-icon
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| 				:name="activeIndex > index ? elActiveIcon : inactiveIcon"
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| 				@click="click(index + 1, $event)"
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| 				:color="activeIndex > index ? elActiveColor : inactiveColor"
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| 				:custom-style="{
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| 					fontSize: size + 'rpx',
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| 					padding: `0 ${gutter / 2 + 'rpx'}`
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| 				}"
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| 				:custom-prefix="customPrefix"
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| 				:show-decimal-icon="showDecimalIcon(index)"
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| 				:percent="decimal"
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| 				:inactive-color="inactiveColor"
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| 			></u-icon>
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| 		</view>
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| 	</view>
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| </template>
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| 
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| <script>/**
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|  * rate 评分
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|  * @description 该组件一般用于满意度调查,星型评分的场景
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|  * @tutorial https://www.uviewui.com/components/rate.html
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|  * @property {String Number} count 最多可选的星星数量(默认5)
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|  * @property {String Number} current 默认选中的星星数量(默认0)
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|  * @property {Boolean} disabled 是否禁止用户操作(默认false)
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|  * @property {String Number} size 星星的大小,单位rpx(默认32)
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|  * @property {String} inactive-color 未选中星星的颜色(默认#b2b2b2)
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|  * @property {String} active-color 选中的星星颜色(默认#FA3534)
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|  * @property {String} active-icon 选中时的图标名,只能为uView的内置图标(默认star-fill)
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|  * @property {String} inactive-icon 未选中时的图标名,只能为uView的内置图标(默认star)
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|  * @property {String} gutter 星星之间的距离(默认10)
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|  * @property {String Number} min-count 最少选中星星的个数(默认0)
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|  * @property {Boolean} allow-half 是否允许半星选择(默认false)
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|  * @event {Function} change 选中的星星发生变化时触发
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|  * @example <u-rate :count="count" :current="2"></u-rate>
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|  */
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| 
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| export default {
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| 	name: 'u-rate',
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| 	props: {
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| 		// 用于v-model双向绑定选中的星星数量
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| 		// 1.4.5版新增
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| 		value: {
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| 			type: [Number, String],
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| 			default: -1
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| 		},
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| 		// 要显示的星星数量
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| 		count: {
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| 			type: [Number, String],
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| 			default: 5
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| 		},
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| 		// 当前需要默认选中的星星(选中的个数)
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| 		// 1.4.5后通过value双向绑定,不再建议使用此参数
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| 		current: {
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| 			type: [Number, String],
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| 			default: 0
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| 		},
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| 		// 是否不可选中
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| 		disabled: {
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| 			type: Boolean,
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| 			default: false
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| 		},
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| 		// 星星的大小,单位rpx
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| 		size: {
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| 			type: [Number, String],
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| 			default: 32
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| 		},
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| 		// 未选中时的颜色
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| 		inactiveColor: {
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| 			type: String,
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| 			default: '#b2b2b2'
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| 		},
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| 		// 选中的颜色
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| 		activeColor: {
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| 			type: String,
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| 			default: '#FA3534'
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| 		},
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| 		// 星星之间的间距,单位rpx
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| 		gutter: {
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| 			type: [Number, String],
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| 			default: 10
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| 		},
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| 		// 最少能选择的星星个数
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| 		minCount: {
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| 			type: [Number, String],
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| 			default: 0
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| 		},
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| 		// 是否允许半星(功能尚未实现)
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| 		allowHalf: {
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| 			type: Boolean,
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| 			default: false
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| 		},
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| 		// 选中时的图标(星星)
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| 		activeIcon: {
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| 			type: String,
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| 			default: 'star-fill'
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| 		},
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| 		// 未选中时的图标(星星)
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| 		inactiveIcon: {
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| 			type: String,
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| 			default: 'star'
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| 		},
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| 		// 自定义扩展前缀,方便用户扩展自己的图标库
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| 		customPrefix: {
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| 			type: String,
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| 			default: 'uicon'
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| 		},
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| 		colors: {
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| 			type: Array,
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| 			default() {
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| 				return []
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| 			}
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| 		},
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| 		icons: {
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| 			type: Array,
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| 			default() {
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| 				return []
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| 			}
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| 		}
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| 	},
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| 	data() {
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| 		return {
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| 			// 生成一个唯一id,否则一个页面多个评分组件,会造成冲突
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| 			elId: this.$u.guid(),
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| 			elClass: this.$u.guid(),
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| 			starBoxLeft: 0, // 评分盒子左边到屏幕左边的距离,用于滑动选择时计算距离
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| 			// 当前激活的星星的index,如果存在value,优先使用value,因为它可以双向绑定(1.4.5新增)
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| 			activeIndex: this.value != -1 ? this.value : this.current,
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| 			starWidth: 0, // 每个星星的宽度
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| 			starWidthArr: [] //每个星星最右边到组件盒子最左边的距离
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| 		}
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| 	},
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| 	watch: {
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| 		current(val) {
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| 			this.activeIndex = val
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| 		},
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| 		value(val) {
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| 			this.activeIndex = val
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| 		}
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| 	},
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| 	computed: {
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| 		decimal() {
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| 			if (this.disabled) {
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| 				return this.activeIndex * 100 % 100
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| 			} else if (this.allowHalf) {
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| 				return 50
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| 			}
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| 		},
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| 		elActiveIcon() {
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| 			const len = this.icons.length
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| 			// 此处规则类似于下方的elActiveColor参数,都是根据一定的规则,显示不同的图标
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| 			// 结果可能如此:icons参数传递了3个图标,当选中两个时,用第一个图标,4个时,用第二个图标
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| 			// 第三个时,用第三个图标作为激活的图标
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| 			if (len && len <= this.count) {
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| 				const step = Math.round(this.activeIndex / Math.round(this.count / len))
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| 				if (step < 1) return this.icons[0]
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| 				if (step > len) return this.icons[len - 1]
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| 				return this.icons[step - 1]
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| 			}
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| 			return this.activeIcon
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| 		},
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| 		elActiveColor() {
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| 			const len = this.colors.length
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| 			// 如果有设置colors参数(此参数用于将图标分段,比如一共5颗星,colors传3个颜色值,那么根据一定的规则,2颗星可能为第一个颜色
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| 			// 4颗星为第二个颜色值,5颗星为第三个颜色值)
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| 			if (len && len <= this.count) {
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| 				const step = Math.round(this.activeIndex / Math.round(this.count / len))
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| 				if (step < 1) return this.colors[0]
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| 				if (step > len) return this.colors[len - 1]
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| 				return this.colors[step - 1]
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| 			}
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| 			return this.activeColor
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| 		}
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| 	},
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| 	methods: {
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| 		// 获取评分组件盒子的布局信息
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| 		getElRectById() {
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| 			// uView封装的获取节点的方法,详见文档
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| 			this.$uGetRect('#' + this.elId).then(res => {
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| 				this.starBoxLeft = res.left
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| 			})
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| 		},
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| 		// 获取单个星星的尺寸
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| 		getElRectByClass() {
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| 			// uView封装的获取节点的方法,详见文档
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| 			this.$uGetRect('.' + this.elClass).then(res => {
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| 				this.starWidth = res.width
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| 				// 把每个星星右边到组件盒子左边的距离放入数组中
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| 				for (let i = 0; i < this.count; i++) {
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| 					this.starWidthArr[i] = (i + 1) * this.starWidth
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| 				}
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| 			})
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| 		},
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| 		// 手指滑动
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| 		touchMove(e) {
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| 			if (this.disabled) {
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| 				return
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| 			}
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| 			if (!e.changedTouches[0]) {
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| 				return
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| 			}
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| 			const movePageX = e.changedTouches[0].pageX
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| 			// 滑动点相对于评分盒子左边的距离
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| 			const distance = movePageX - this.starBoxLeft
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| 
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| 			// 如果滑动到了评分盒子的左边界,就设置为0星
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| 			if (distance <= 0) {
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| 				this.activeIndex = 0
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| 			}
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| 			// 滑动的距离,相当于多少颗星星
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| 			let index = Math.ceil(distance / this.starWidth)
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| 			this.activeIndex = index > this.count ? this.count : index
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| 			// 对最少颗星星的限制
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| 			if (this.activeIndex < this.minCount) this.activeIndex = this.minCount
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| 			this.emitEvent()
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| 		},
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| 		// 通过点击,直接选中
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| 		click(index, e) {
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| 			if (this.disabled) {
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| 				return
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| 			}
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| 			// 半星选择,尚未实现
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| 			if (this.allowHalf) {
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| 			}
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| 			// 对第一个星星特殊处理,只有一个的时候,点击可以取消,否则无法作0星评价
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| 			if (index == 1) {
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| 				if (this.activeIndex == 1) {
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| 					this.activeIndex = 0
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| 				} else {
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| 					this.activeIndex = 1
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| 				}
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| 			} else {
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| 				this.activeIndex = index
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| 			}
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| 			// 对最少颗星星的限制
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| 			if (this.activeIndex < this.minCount) this.activeIndex = this.minCount
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| 			this.emitEvent()
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| 		},
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| 		// 发出事件
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| 		emitEvent() {
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| 			// 发出change事件
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| 			this.$emit('change', this.activeIndex)
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| 			// 同时修改双向绑定的value的值
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| 			if (this.value != -1) {
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| 				this.$emit('input', this.activeIndex)
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| 			}
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| 		},
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| 		showDecimalIcon(index) {
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| 			return this.disabled && parseInt(this.activeIndex) === index
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| 		}
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| 	},
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| 	mounted() {
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| 		this.getElRectById()
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| 		this.getElRectByClass()
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| 	}
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| }
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| </script>
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| 
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| <style scoped lang="scss">
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| @import "../../libs/css/style.components.scss";
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| 
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| .u-rate {
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| 	display: -webkit-inline-flex;
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| 	display: inline-flex;
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| 	align-items: center;
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| 	margin: 0;
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| 	padding: 0;
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| }
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| 
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| .u-icon {
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| 	box-sizing: border-box;
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| }
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| </style>
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