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<template>
<!-- #ifndef APP-NVUE -->
<view
class="uv-grid-item"
hover-class="uv-grid-item--hover-class"
:hover-stay-time="200"
@tap="clickHandler"
:class="classes"
:style="[itemStyle]"
>
<slot />
</view>
<!-- #endif -->
<!-- #ifdef APP-NVUE -->
<view
class="uv-grid-item"
:hover-stay-time="200"
@tap="clickHandler"
:class="classes"
:style="[itemStyle]"
>
<slot />
</view>
<!-- #endif -->
</template>
<script>
import mpMixin from '@/uni_modules/uv-ui-tools/libs/mixin/mpMixin.js'
import mixin from '@/uni_modules/uv-ui-tools/libs/mixin/mixin.js'
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uv-grid使用
* @tutorial https://www.uvui.cn/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 <uv-grid-item></uv-grid-item>
*/
export default {
name: "uv-grid-item",
mixins: [mpMixin, mixin, props],
emits: ['$uvGridItem','click'],
data() {
return {
parentData: {
col: 3, // 父组件划分的宫格数
border: true, // 是否显示边框,根据父组件决定
},
// #ifdef APP-NVUE
width: 0, // nvue下才这么计算vue下放到computed中否则会因为延时造成闪烁
// #endif
classes: [], // 类名集合,用于判断是否显示右边和下边框
};
},
created() {
// 父组件的实例
this.updateParentData()
},
mounted() {
this.init()
},
computed: {
// #ifndef APP-NVUE
// vue下放到computed中否则会因为延时造成闪烁
width() {
return 100 / Number(this.parentData.col) + '%'
},
// #endif
itemStyle() {
const style = {
background: this.bgColor,
width: this.width
}
return this.$uv.deepMerge(style, this.$uv.addStyle(this.customStyle))
}
},
methods: {
init() {
// 用于在父组件uv-grid的children中被添加入子组件时
// 重新计算item的边框
uni.$on('$uvGridItem', () => {
this.gridItemClasses()
})
// #ifdef APP-NVUE
// 获取元素该有的长度nvue下要延时才准确
this.$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.$emit('$uvGridItem')
this.gridItemClasses()
},
// 获取父组件的参数
updateParentData() {
// 此方法写在mixin中
this.getParentData('uv-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['uv-grid'], res => {
resolve(res.size.width)
})
})
// #endif
},
gridItemClasses() {
if(this.parentData.border) {
let 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('uv-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('uv-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
}
}
},
// #ifdef VUE2
beforeDestroy() {
// 移除事件监听,释放性能
uni.$off('$uvGridItem')
},
// #endif
// #ifdef VUE3
unmounted() {
// 移除事件监听,释放性能
uni.$off('$uvGridItem')
}
// #endif
};
</script>
<style lang="scss" scoped>
$show-border: 1;
$show-border-right: 1;
$show-border-bottom: 1;
@import '@/uni_modules/uv-ui-tools/libs/css/variable.scss';
@import '@/uni_modules/uv-ui-tools/libs/css/components.scss';
@import '@/uni_modules/uv-ui-tools/libs/css/color.scss';
$uv-grid-item-hover-class-opcatiy:.5 !default;
$uv-grid-item-margin-top:1rpx !default;
$uv-grid-item-border-right-width:0.5px !default;
$uv-grid-item-border-bottom-width:0.5px !default;
$uv-grid-item-border-right-color:$uv-border-color !default;
$uv-grid-item-border-bottom-color:$uv-border-color !default;
.uv-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:$uv-grid-item-margin-top;
/* #endif */
&--hover-class {
opacity:$uv-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
.uv-border-right {
border-right-width:$uv-grid-item-border-right-width;
border-color: $uv-grid-item-border-right-color;
}
.uv-border-bottom {
border-bottom-width:$uv-grid-item-border-bottom-width;
border-color:$uv-grid-item-border-bottom-color;
}
/* #endif */
</style>