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<template> <view class="u-grid" ref='u-grid' :style="[gridStyle]" > <slot /> </view> </template>
<script> import props from './props.js'; /** * grid 宫格布局 * @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。 * @tutorial https://www.uviewui.com/components/grid.html
* @property {String | Number} col 宫格的列数(默认 3 ) * @property {Boolean} border 是否显示宫格的边框(默认 false ) * @property {String} align 宫格对齐方式,表现为数量少的时候,靠左,居中,还是靠右 (默认 'left' ) * @property {Object} customStyle 定义需要用到的外部样式 * @event {Function} click 点击宫格触发 * @example <u-grid :col="3" @click="click"></u-grid> */ export default { name: 'u-grid', mixins: [uni.$u.mpMixin, uni.$u.mixin,props], data() { return { index: 0, width: 0 } }, watch: { // 当父组件需要子组件需要共享的参数发生了变化,手动通知子组件
parentData() { if (this.children.length) { this.children.map(child => { // 判断子组件(u-radio)如果有updateParentData方法的话,就就执行(执行的结果是子组件重新从父组件拉取了最新的值)
typeof(child.updateParentData) == 'function' && child.updateParentData(); }) } }, }, created() { // 如果将children定义在data中,在微信小程序会造成循环引用而报错
this.children = [] }, computed: { // 计算父组件的值是否发生变化
parentData() { return [this.hoverClass, this.col, this.size, this.border]; }, // 宫格对齐方式
gridStyle() { let style = {}; switch (this.align) { case 'left': style.justifyContent = 'flex-start'; break; case 'center': style.justifyContent = 'center'; break; case 'right': style.justifyContent = 'flex-end'; break; default: style.justifyContent = 'flex-start'; }; return uni.$u.deepMerge(style, uni.$u.addStyle(this.customStyle)); } }, methods: { // 此方法由u-grid-item触发,用于在u-grid发出事件
childClick(name) { this.$emit('click', name) } } }; </script>
<style lang="scss" scoped> @import "../../libs/css/components.scss"; $u-grid-width:100% !default; .u-grid { /* #ifdef MP */ width: $u-grid-width; position: relative; box-sizing: border-box; overflow: hidden; display: block; /* #endif */ justify-content: center; @include flex; flex-wrap: wrap; align-items: center; } </style>
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