| <template> | 
|     <!-- #ifndef APP-NVUE --> | 
|     <view | 
|         class="u-grid-item" | 
|         hover-class="u-grid-item--hover-class" | 
|         :hover-stay-time="200" | 
|         @tap="clickHandler" | 
|         :class="classes" | 
|         :style="[itemStyle]" | 
|     > | 
|         <slot /> | 
|     </view> | 
|     <!-- #endif --> | 
|     <!-- #ifdef APP-NVUE --> | 
|     <view | 
|         class="u-grid-item" | 
|         :hover-stay-time="200" | 
|         @tap="clickHandler" | 
|         :class="classes" | 
|         :style="[itemStyle]" | 
|     > | 
|         <slot /> | 
|     </view> | 
|     <!-- #endif --> | 
| </template> | 
|   | 
| <script> | 
|     import props from './props.js'; | 
|     /** | 
|      * gridItem 提示 | 
|      * @description 宫格组件一般用于同时展示多个同类项目的场景,可以给宫格的项目设置徽标组件(badge),或者图标等,也可以扩展为左右滑动的轮播形式。搭配u-grid使用 | 
|      * @tutorial https://www.uviewui.com/components/grid.html | 
|      * @property {String | Number}    name        宫格的name ( 默认 null ) | 
|      * @property {String}            bgColor        宫格的背景颜色 (默认 'transparent' ) | 
|      * @property {Object}            customStyle    自定义样式,对象形式 | 
|      * @event {Function} click 点击宫格触发 | 
|      * @example <u-grid-item></u-grid-item> | 
|      */ | 
|     export default { | 
|         name: "u-grid-item", | 
|         mixins: [uni.$u.mpMixin, uni.$u.mixin,props], | 
|         data() { | 
|             return { | 
|                 parentData: { | 
|                     col: 3, // 父组件划分的宫格数 | 
|                     border: true, // 是否显示边框,根据父组件决定 | 
|                 }, | 
|                 // #ifdef APP-NVUE | 
|                 width: 0, // nvue下才这么计算,vue下放到computed中,否则会因为延时造成闪烁 | 
|                 // #endif | 
|                 classes: [], // 类名集合,用于判断是否显示右边和下边框 | 
|             }; | 
|         }, | 
|         mounted() { | 
|             this.init() | 
|         }, | 
|         computed: { | 
|             // #ifndef APP-NVUE | 
|             // vue下放到computed中,否则会因为延时造成闪烁 | 
|             width() { | 
|                 return 100 / Number(this.parentData.col) + '%' | 
|             }, | 
|             // #endif | 
|             itemStyle() { | 
|                 const style = { | 
|                     background: this.bgColor, | 
|                     width: this.width | 
|                 } | 
|                 return uni.$u.deepMerge(style, uni.$u.addStyle(this.customStyle)) | 
|             } | 
|         }, | 
|         methods: { | 
|             init() { | 
|                 // 用于在父组件u-grid的children中被添加入子组件时, | 
|                 // 重新计算item的边框 | 
|                 uni.$on('$uGridItem', () => { | 
|                     this.gridItemClasses() | 
|                 }) | 
|                 // 父组件的实例 | 
|                 this.updateParentData() | 
|                 // #ifdef APP-NVUE | 
|                 // 获取元素该有的长度,nvue下要延时才准确 | 
|                 this.$nextTick(function(){ | 
|                     this.getItemWidth() | 
|                 }) | 
|                 // #endif | 
|                 // 发出事件,通知所有的grid-item都重新计算自己的边框 | 
|                 uni.$emit('$uGridItem') | 
|                 this.gridItemClasses() | 
|             }, | 
|             // 获取父组件的参数 | 
|             updateParentData() { | 
|                 // 此方法写在mixin中 | 
|                 this.getParentData('u-grid'); | 
|             }, | 
|             clickHandler() { | 
|                 let name = this.name | 
|                 // 如果没有设置name属性,历遍父组件的children数组,判断当前的元素是否和本实例this相等,找出当前组件的索引 | 
|                 const children = this.parent?.children | 
|                 if(children && this.name === null) { | 
|                     name = children.findIndex(child => child === this) | 
|                 } | 
|                 // 调用父组件方法,发出事件 | 
|                 this.parent && this.parent.childClick(name) | 
|                 this.$emit('click', name) | 
|             }, | 
|             async getItemWidth() { | 
|                 // 如果是nvue,不能使用百分比,只能使用固定宽度 | 
|                 let width = 0 | 
|                 if(this.parent) { | 
|                     // 获取父组件宽度后,除以栅格数,得出每个item的宽度 | 
|                     const parentWidth = await this.getParentWidth() | 
|                     width = parentWidth / Number(this.parentData.col) + 'px' | 
|                 } | 
|                 this.width = width | 
|             }, | 
|             // 获取父元素的尺寸 | 
|             getParentWidth() { | 
|                 // #ifdef APP-NVUE | 
|                 // 返回一个promise,让调用者可以用await同步获取 | 
|                 const dom = uni.requireNativePlugin('dom') | 
|                 return new Promise(resolve => { | 
|                     // 调用父组件的ref | 
|                     dom.getComponentRect(this.parent.$refs['u-grid'], res => { | 
|                         resolve(res.size.width) | 
|                     }) | 
|                 }) | 
|                 // #endif | 
|             }, | 
|             gridItemClasses() { | 
|                 if(this.parentData.border) { | 
|                     const classes = [] | 
|                     this.parent.children.map((child, index) =>{ | 
|                         if(this === child) { | 
|                             const len = this.parent.children.length | 
|                             // 贴近右边屏幕边沿的child,并且最后一个(比如只有横向2个的时候),无需右边框 | 
|                             if((index + 1) % this.parentData.col !== 0 && index + 1 !== len) { | 
|                                 classes.push('u-border-right') | 
|                             } | 
|                             // 总的宫格数量对列数取余的值 | 
|                             // 如果取余后,值为0,则意味着要将最后一排的宫格,都不需要下边框 | 
|                             const lessNum = len % this.parentData.col === 0 ? this.parentData.col : len % this.parentData.col | 
|                             // 最下面的一排child,无需下边框 | 
|                             if(index < len - lessNum) { | 
|                                 classes.push('u-border-bottom') | 
|                             } | 
|                         } | 
|                     }) | 
|                     // 支付宝,头条小程序无法动态绑定一个数组类名,否则解析出来的结果会带有",",而导致失效 | 
|                     // #ifdef MP-ALIPAY || MP-TOUTIAO | 
|                     classes = classes.join(' ') | 
|                     // #endif | 
|                     this.classes = classes | 
|                 } | 
|             } | 
|         }, | 
|         beforeDestroy() { | 
|             // 移除事件监听,释放性能 | 
|             uni.$off('$uGridItem') | 
|         } | 
|     }; | 
| </script> | 
|   | 
| <style lang="scss" scoped> | 
|     @import "../../libs/css/components.scss"; | 
|       $u-grid-item-hover-class-opcatiy:.5 !default; | 
|       $u-grid-item-margin-top:1rpx !default; | 
|       $u-grid-item-border-right-width:0.5px !default; | 
|       $u-grid-item-border-bottom-width:0.5px !default; | 
|       $u-grid-item-border-right-color:$u-border-color !default; | 
|       $u-grid-item-border-bottom-color:$u-border-color !default; | 
|     .u-grid-item { | 
|         align-items: center; | 
|         justify-content: center; | 
|         position: relative; | 
|         flex-direction: column; | 
|         /* #ifndef APP-NVUE */ | 
|         box-sizing: border-box; | 
|         display: flex; | 
|         /* #endif */ | 
|   | 
|         /* #ifdef MP */ | 
|         position: relative; | 
|         float: left; | 
|         /* #endif */ | 
|   | 
|         /* #ifdef MP-WEIXIN */ | 
|         margin-top:$u-grid-item-margin-top; | 
|         /* #endif */ | 
|   | 
|         &--hover-class { | 
|             opacity:$u-grid-item-hover-class-opcatiy; | 
|         } | 
|     } | 
|   | 
|     /* #ifdef APP-NVUE */ | 
|     // 由于nvue不支持组件内引入app.vue中再引入的样式,所以需要写在这里 | 
|     .u-border-right { | 
|         border-right-width:$u-grid-item-border-right-width; | 
|         border-color: $u-grid-item-border-right-color; | 
|     } | 
|   | 
|     .u-border-bottom { | 
|         border-bottom-width:$u-grid-item-border-bottom-width; | 
|         border-color:$u-grid-item-border-bottom-color; | 
|     } | 
|   | 
|     /* #endif */ | 
| </style> |