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7 months ago
<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>