| <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> |