New file |
| | |
| | | <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> |