| <template> | |
| 	<view class="u-skeleton"> | |
| 		<view | |
| 		    class="u-skeleton__wrapper" | |
| 		    ref="u-skeleton__wrapper" | |
| 		    v-if="loading" | |
| 			style="display: flex; flex-direction: row;" | |
| 		> | |
| 			<view | |
| 			    class="u-skeleton__wrapper__avatar" | |
| 			    v-if="avatar" | |
| 			    :class="[`u-skeleton__wrapper__avatar--${avatarShape}`, animate && 'animate']" | |
| 			    :style="{ | |
| 						height: $u.addUnit(avatarSize), | |
| 						width: $u.addUnit(avatarSize) | |
| 					}" | |
| 			></view> | |
| 			<view | |
| 			    class="u-skeleton__wrapper__content" | |
| 			    ref="u-skeleton__wrapper__content" | |
| 				style="flex: 1;" | |
| 			> | |
| 				<view | |
| 				    class="u-skeleton__wrapper__content__title" | |
| 				    v-if="title" | |
| 				    :style="{ | |
| 							width: uTitleWidth, | |
| 							height: $u.addUnit(titleHeight), | |
| 						}" | |
| 				    :class="[animate && 'animate']" | |
| 				></view> | |
| 				<view | |
| 				    class="u-skeleton__wrapper__content__rows" | |
| 				    :class="[animate && 'animate']" | |
| 				    v-for="(item, index) in rowsArray" | |
| 				    :key="index" | |
| 				    :style="{ | |
| 							 width: item.width, | |
| 							 height: item.height, | |
| 							 marginTop: item.marginTop | |
| 						}" | |
| 				> | |
| 		 | |
| 				</view> | |
| 			</view> | |
| 		</view> | |
| 		<slot v-else /> | |
| 	</view> | |
| </template> | |
|  | |
| <script> | |
| 	import props from './props.js'; | |
| 	// #ifdef APP-NVUE | |
| 	// 由于weex为阿里的KPI业绩考核的产物,所以不支持百分比单位,这里需要通过dom查询组件的宽度 | |
| 	const dom = uni.requireNativePlugin('dom') | |
| 	const animation = uni.requireNativePlugin('animation') | |
| 	// #endif | |
| 	/** | |
| 	 * Skeleton 骨架屏 | |
| 	 * @description 骨架屏一般用于页面在请求远程数据尚未完成时,页面用灰色块预显示本来的页面结构,给用户更好的体验。 | |
| 	 * @tutorial https://www.uviewui.com/components/skeleton.html | |
| 	 * @property {Boolean}					loading		是否显示骨架占位图,设置为false将会展示子组件内容 (默认 true ) | |
| 	 * @property {Boolean}					animate		是否开启动画效果 (默认 true ) | |
| 	 * @property {String | Number}			rows		段落占位图行数 (默认 0 ) | |
| 	 * @property {String | Number | Array}	rowsWidth	段落占位图的宽度,可以为百分比,数值,带单位字符串等,可通过数组传入指定每个段落行的宽度 (默认 '100%' ) | |
| 	 * @property {String | Number | Array}	rowsHeight	段落的高度 (默认 18 ) | |
| 	 * @property {Boolean}					title		是否展示标题占位图 (默认 true ) | |
| 	 * @property {String | Number}			titleWidth	标题的宽度 (默认 '50%' ) | |
| 	 * @property {String | Number}			titleHeight	标题的高度 (默认 18 ) | |
| 	 * @property {Boolean}					avatar		是否展示头像占位图 (默认 false ) | |
| 	 * @property {String | Number}			avatarSize	头像占位图大小 (默认 32 ) | |
| 	 * @property {String}					avatarShape	头像占位图的形状,circle-圆形,square-方形 (默认 'circle' ) | |
| 	 * @example <u-search placeholder="日照香炉生紫烟" v-model="keyword"></u-search> | |
| 	 */ | |
| 	export default { | |
| 		name: 'u-skeleton', | |
| 		mixins: [uni.$u.mpMixin, uni.$u.mixin, props], | |
| 		data() { | |
| 			return { | |
| 				width: 0, | |
| 			} | |
| 		}, | |
| 		watch: { | |
| 			loading() { | |
| 				this.getComponentWidth() | |
| 			} | |
| 		}, | |
| 		computed: { | |
| 			rowsArray() { | |
| 				if (/%$/.test(this.rowsHeight)) { | |
| 					uni.$u.error('rowsHeight参数不支持百分比单位') | |
| 				} | |
| 				const rows = [] | |
| 				for (let i = 0; i < this.rows; i++) { | |
| 					let item = {}, | |
| 						// 需要预防超出数组边界的情况 | |
| 						rowWidth = uni.$u.test.array(this.rowsWidth) ? (this.rowsWidth[i] || (i === this.row - 1 ? '70%' : '100%')) : i === | |
| 						this.rows - 1 ? '70%' : this.rowsWidth, | |
| 						rowHeight = uni.$u.test.array(this.rowsHeight) ? (this.rowsHeight[i] || '18px') : this.rowsHeight | |
| 					// 如果有title占位图,第一个段落占位图的外边距需要大一些,如果没有title占位图,第一个段落占位图则无需外边距 | |
| 					// 之所以需要这么做,是因为weex的无能,以提升性能为借口不支持css的一些伪类 | |
| 					item.marginTop = !this.title && i === 0 ? 0 : this.title && i === 0 ? '20px' : '12px' | |
| 					// 如果设置的为百分比的宽度,转换为px值,因为nvue不支持百分比单位 | |
| 					if (/%$/.test(rowWidth)) { | |
| 						// 通过parseInt提取出百分比单位中的数值部分,除以100得到百分比的小数值 | |
| 						item.width = uni.$u.addUnit(this.width * parseInt(rowWidth) / 100) | |
| 					} else { | |
| 						item.width = uni.$u.addUnit(rowWidth) | |
| 					} | |
| 					item.height = uni.$u.addUnit(rowHeight) | |
| 					rows.push(item) | |
| 				} | |
| 				// console.log(rows); | |
| 				return rows | |
| 			}, | |
| 			uTitleWidth() { | |
| 				let tWidth = 0 | |
| 				if (/%$/.test(this.titleWidth)) { | |
| 					// 通过parseInt提取出百分比单位中的数值部分,除以100得到百分比的小数值 | |
| 					tWidth = uni.$u.addUnit(this.width * parseInt(this.titleWidth) / 100) | |
| 				} else { | |
| 					tWidth = uni.$u.addUnit(this.titleWidth) | |
| 				} | |
| 				return uni.$u.addUnit(tWidth) | |
| 			}, | |
| 			 | |
| 		}, | |
| 		mounted() { | |
| 			this.init() | |
| 		}, | |
| 		methods: { | |
| 			init() { | |
| 				this.getComponentWidth() | |
| 				// #ifdef APP-NVUE | |
| 				this.loading && this.animate && this.setNvueAnimation() | |
| 				// #endif | |
| 			}, | |
| 			async setNvueAnimation() { | |
| 				// #ifdef APP-NVUE | |
| 				// 为了让opacity:1的状态保持一定时间,这里做一个延时 | |
| 				await uni.$u.sleep(500) | |
| 				const skeleton = this.$refs['u-skeleton__wrapper']; | |
| 				skeleton && this.loading && this.animate && animation.transition(skeleton, { | |
| 					styles: { | |
| 						opacity: 0.5 | |
| 					}, | |
| 					duration: 600, | |
| 				}, () => { | |
| 					// 这里无需判断是否loading和开启动画状态,因为最终的状态必须达到opacity: 1,否则可能 | |
| 					// 会停留在opacity: 0.5的状态中 | |
| 					animation.transition(skeleton, { | |
| 						styles: { | |
| 							opacity: 1 | |
| 						}, | |
| 						duration: 600, | |
| 					}, () => { | |
| 						// 只有在loading中时,才执行动画 | |
| 						this.loading && this.animate && this.setNvueAnimation() | |
| 					}) | |
| 				}) | |
| 				// #endif | |
| 			}, | |
| 			// 获取组件的宽度 | |
| 			async getComponentWidth() { | |
| 				// 延时一定时间,以获取dom尺寸 | |
| 				await uni.$u.sleep(20) | |
| 				// #ifndef APP-NVUE | |
| 				this.$uGetRect('.u-skeleton__wrapper__content').then(size => { | |
| 					this.width = size.width | |
| 				}) | |
| 				// #endif | |
|  | |
| 				// #ifdef APP-NVUE | |
| 				const ref = this.$refs['u-skeleton__wrapper__content'] | |
| 				ref && dom.getComponentRect(ref, (res) => { | |
| 					this.width = res.size.width | |
| 				}) | |
| 				// #endif | |
| 			} | |
| 		} | |
| 	} | |
| </script> | |
| 
 | |
| <style lang="scss" scoped> | |
| 	@import "../../libs/css/components.scss"; | |
| 
 | |
| 	@mixin background { | |
| 		/* #ifdef APP-NVUE */ | |
| 		background-color: #F1F2F4; | |
| 		/* #endif */ | |
| 		/* #ifndef APP-NVUE */ | |
| 		background: linear-gradient(90deg, #F1F2F4 25%, #e6e6e6 37%, #F1F2F4 50%); | |
| 		background-size: 400% 100%; | |
| 		/* #endif */ | |
| 	} | |
| 
 | |
| 	.u-skeleton { | |
| 		flex: 1; | |
| 		 | |
| 		&__wrapper { | |
| 			@include flex(row); | |
| 			 | |
| 			&__avatar { | |
| 				@include background; | |
| 				margin-right: 15px; | |
| 			 | |
| 				&--circle { | |
| 					border-radius: 100px; | |
| 				} | |
| 			 | |
| 				&--square { | |
| 					border-radius: 4px; | |
| 				} | |
| 			} | |
| 			 | |
| 			&__content { | |
| 				flex: 1; | |
| 			 | |
| 				&__rows, | |
| 				&__title { | |
| 					@include background; | |
| 					border-radius: 3px; | |
| 				} | |
| 			} | |
| 		} | |
| 	} | |
| 
 | |
| 	/* #ifndef APP-NVUE */ | |
| 	.animate { | |
| 		animation: skeleton 1.8s ease infinite | |
| 	} | |
| 
 | |
| 	@keyframes skeleton { | |
| 		0% { | |
| 			background-position: 100% 50% | |
| 		} | |
| 
 | |
| 		100% { | |
| 			background-position: 0 50% | |
| 		} | |
| 	} | |
| 
 | |
| 	/* #endif */ | |
| </style>
 |