dykj-outsource-12123/uni_modules/uview-plus/components/u-album/u-album.vue

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Vue
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2024-06-28 14:18:30 +08:00
<template>
<view class="u-album">
<view
class="u-album__row"
ref="u-album__row"
v-for="(arr, index) in showUrls"
:forComputedUse="albumWidth"
:key="index"
>
<view
class="u-album__row__wrapper"
v-for="(item, index1) in arr"
:key="index1"
:style="[imageStyle(index + 1, index1 + 1)]"
@tap="previewFullImage ? onPreviewTap(getSrc(item)) : ''"
>
<image
:src="getSrc(item)"
:mode="
urls.length === 1
? imageHeight > 0
? singleMode
: 'widthFix'
: multipleMode
"
:style="[
{
width: imageWidth,
height: imageHeight
}
]"
></image>
<view
v-if="
showMore &&
urls.length > rowCount * showUrls.length &&
index === showUrls.length - 1 &&
index1 === showUrls[showUrls.length - 1].length - 1
"
class="u-album__row__wrapper__text"
>
<up-text
:text="`+${urls.length - maxCount}`"
color="#fff"
:size="multipleSize * 0.3"
align="center"
customStyle="justify-content: center"
></up-text>
</view>
</view>
</view>
</view>
</template>
<script>
import props from './props';
import mpMixin from '../../libs/mixin/mpMixin';
import mixin from '../../libs/mixin/mixin';
import { addUnit, sleep } from '../../libs/function/index';
import test from '../../libs/function/test';
// #ifdef APP-NVUE
// 由于weex为阿里的KPI业绩考核的产物所以不支持百分比单位这里需要通过dom查询组件的宽度
const dom = uni.requireNativePlugin('dom')
// #endif
/**
* Album 相册
* @description 本组件提供一个类似相册的功能让开发者开发起来更加得心应手减少重复的模板代码
* @tutorial https://ijry.github.io/uview-plus/components/album.html
*
* @property {Array} urls 图片地址列表 Array<String>|Array<Object>形式
* @property {String} keyName 指定从数组的对象元素中读取哪个属性作为图片地址
* @property {String | Number} singleSize 单图时图片长边的长度 默认 180
* @property {String | Number} multipleSize 多图时图片边长 默认 70
* @property {String | Number} space 多图时图片水平和垂直之间的间隔 默认 6
* @property {String} singleMode 单图时图片缩放裁剪的模式 默认 'scaleToFill'
* @property {String} multipleMode 多图时图片缩放裁剪的模式 默认 'aspectFill'
* @property {String | Number} maxCount 取消按钮的提示文字 默认 9
* @property {Boolean} previewFullImage 是否可以预览图片 默认 true
* @property {String | Number} rowCount 每行展示图片数量如设置singleSize和multipleSize将会无效 默认 3
* @property {Boolean} showMore 超出maxCount时是否显示查看更多的提示 默认 true
*
* @event {Function} albumWidth 某些特殊的情况下需要让文字与相册的宽度相等这里事件的形式对外发送 回调参数 width
* @example <u-album :urls="urls2" @albumWidth="width => albumWidth = width" multipleSize="68" ></u-album>
*/
export default {
name: 'u-album',
mixins: [mpMixin, mixin, props],
data() {
return {
// 单图的宽度
singleWidth: 0,
// 单图的高度
singleHeight: 0,
// 单图时,如果无法获取图片的尺寸信息,让图片宽度默认为容器的一定百分比
singlePercent: 0.6
}
},
watch: {
urls: {
immediate: true,
handler(newVal) {
if (newVal.length === 1) {
this.getImageRect()
}
}
}
},
emits: ["albumWidth"],
computed: {
imageStyle() {
return (index1, index2) => {
const { space, rowCount, multipleSize, urls } = this,
{ addUnit, addStyle } = uni.$u,
rowLen = this.showUrls.length,
allLen = this.urls.length
const style = {
marginRight: addUnit(space),
marginBottom: addUnit(space)
}
// 如果为最后一行,则每个图片都无需下边框
if (index1 === rowLen) style.marginBottom = 0
// 每行的最右边一张和总长度的最后一张无需右边框
if (
index2 === rowCount ||
(index1 === rowLen &&
index2 === this.showUrls[index1 - 1].length)
)
style.marginRight = 0
return style
}
},
// 将数组划分为二维数组
showUrls() {
const arr = []
this.urls.map((item, index) => {
// 限制最大展示数量
if (index + 1 <= this.maxCount) {
// 计算该元素为第几个素组内
const itemIndex = Math.floor(index / this.rowCount)
// 判断对应的索引是否存在
if (!arr[itemIndex]) {
arr[itemIndex] = []
}
arr[itemIndex].push(item)
}
})
return arr
},
imageWidth() {
return addUnit(
this.urls.length === 1 ? this.singleWidth : this.multipleSize
)
},
imageHeight() {
return addUnit(
this.urls.length === 1 ? this.singleHeight : this.multipleSize
)
},
// 此变量无实际用途仅仅是为了利用computed特性让其在urls长度等变化时重新计算图片的宽度
// 因为用户在某些特殊的情况下,需要让文字与相册的宽度相等,所以这里事件的形式对外发送
albumWidth() {
let width = 0
if (this.urls.length === 1) {
width = this.singleWidth
} else {
width =
this.showUrls[0].length * this.multipleSize +
this.space * (this.showUrls[0].length - 1)
}
this.$emit('albumWidth', width)
return width
}
},
methods: {
// 预览图片
onPreviewTap(url) {
const urls = this.urls.map((item) => {
return this.getSrc(item)
})
uni.previewImage({
current: url,
urls
})
},
// 获取图片的路径
getSrc(item) {
return test.object(item)
? (this.keyName && item[this.keyName]) || item.src
: item
},
// 单图时,获取图片的尺寸
// 在小程序中需要将网络图片的的域名添加到小程序的download域名才可能获取尺寸
// 在没有添加的情况下,让单图宽度默认为盒子的一定宽度(singlePercent)
getImageRect() {
const src = this.getSrc(this.urls[0])
uni.getImageInfo({
src,
success: (res) => {
// 判断图片横向还是竖向展示方式
const isHorizotal = res.width >= res.height
this.singleWidth = isHorizotal
? this.singleSize
: (res.width / res.height) * this.singleSize
this.singleHeight = !isHorizotal
? this.singleSize
: (res.height / res.width) * this.singleWidth
},
fail: () => {
this.getComponentWidth()
}
})
},
// 获取组件的宽度
async getComponentWidth() {
// 延时一定时间以获取dom尺寸
await sleep(30)
// #ifndef APP-NVUE
this.$uGetRect('.u-album__row').then((size) => {
this.singleWidth = size.width * this.singlePercent
})
// #endif
// #ifdef APP-NVUE
// 这里ref="u-album__row"所在的标签为通过for循环出来导致this.$refs['u-album__row']是一个数组
const ref = this.$refs['u-album__row'][0]
ref &&
dom.getComponentRect(ref, (res) => {
this.singleWidth = res.size.width * this.singlePercent
})
// #endif
}
}
}
</script>
<style lang="scss" scoped>
@import '../../libs/css/components.scss';
.u-album {
@include flex(column);
&__row {
@include flex(row);
flex-wrap: wrap;
&__wrapper {
position: relative;
&__text {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: rgba(0, 0, 0, 0.3);
@include flex(row);
justify-content: center;
align-items: center;
}
}
}
}
</style>