mirror of
https://gitee.com/huangge1199_admin/vue-pro.git
synced 2024-12-11 16:32:28 +08:00
236 lines
7.5 KiB
Vue
236 lines
7.5 KiB
Vue
<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="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"
|
||
>
|
||
<u--text
|
||
:text="`+${urls.length - maxCount}`"
|
||
color="#fff"
|
||
:size="multipleSize * 0.3"
|
||
align="center"
|
||
customStyle="justify-content: center"
|
||
></u--text>
|
||
</view>
|
||
</view>
|
||
</view>
|
||
</view>
|
||
</template>
|
||
|
||
<script>
|
||
import props from './props.js';
|
||
// #ifdef APP-NVUE
|
||
// 由于weex为阿里的KPI业绩考核的产物,所以不支持百分比单位,这里需要通过dom查询组件的宽度
|
||
const dom = uni.requireNativePlugin('dom')
|
||
// #endif
|
||
|
||
/**
|
||
* Album 相册
|
||
* @description 本组件提供一个类似相册的功能,让开发者开发起来更加得心应手。减少重复的模板代码
|
||
* @tutorial https://www.uviewui.com/components/album.html
|
||
*
|
||
* @property {Array} urls 图片地址列表 Array<String>|Array<Object>形式
|
||
* @property {String} keyName 指定从数组的对象元素中读取哪个属性作为图片地址
|
||
* @property {String | Number} singleSize 单图时,图片长边的长度 (默认 180 )
|
||
* @property {String | Number} multipleSize 多图时,图片边长 (默认 70 )
|
||
* @property {String | Number} space 多图时,图片水平和垂直之间的间隔 (默认 6 )
|
||
* @property {String} singleMode 单图时,图片缩放裁剪的模式 (默认 'scaleToFill' )
|
||
* @property {String} multipleMode 多图时,图片缩放裁剪的模式 (默认 'aspectFill' )
|
||
* @property {String | Number} maxCount 取消按钮的提示文字 (默认 9 )
|
||
* @property {Boolean} previewFullImage 是否可以预览图片 (默认 true )
|
||
* @property {String | Number} rowCount 每行展示图片数量,如设置,singleSize和multipleSize将会无效 (默认 3 )
|
||
* @property {Boolean} showMore 超出maxCount时是否显示查看更多的提示 (默认 true )
|
||
*
|
||
* @event {Function} albumWidth 某些特殊的情况下,需要让文字与相册的宽度相等,这里事件的形式对外发送 (回调参数 width )
|
||
* @example <u-album :urls="urls2" @albumWidth="width => albumWidth = width" multipleSize="68" ></u-album>
|
||
*/
|
||
export default {
|
||
name: 'u-album',
|
||
mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
|
||
data() {
|
||
return {
|
||
// 单图的宽度
|
||
singleWidth: 0,
|
||
// 单图的高度
|
||
singleHeight: 0,
|
||
// 单图时,如果无法获取图片的尺寸信息,让图片宽度默认为容器的一定百分比
|
||
singlePercent: 0.6,
|
||
}
|
||
},
|
||
watch: {
|
||
urls: {
|
||
immediate: true,
|
||
handler(newVal) {
|
||
if (newVal.length === 1) {
|
||
this.getImageRect()
|
||
}
|
||
}
|
||
}
|
||
},
|
||
computed: {
|
||
imageStyle() {
|
||
return (index1, index2) => {
|
||
const {
|
||
space,
|
||
rowCount,
|
||
multipleSize,
|
||
urls
|
||
} = this, {
|
||
addUnit,
|
||
addStyle
|
||
} = uni.$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 this.$u.addUnit(this.urls.length === 1 ? this.singleWidth : this.multipleSize)
|
||
},
|
||
imageHeight() {
|
||
return this.$u.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.$emit('albumWidth', width)
|
||
return width
|
||
}
|
||
},
|
||
methods: {
|
||
// 预览图片
|
||
onPreviewTap(url) {
|
||
const urls = this.urls.map(item => {
|
||
return this.getSrc(item)
|
||
})
|
||
uni.previewImage({
|
||
current: url,
|
||
urls
|
||
});
|
||
},
|
||
// 获取图片的路径
|
||
getSrc(item) {
|
||
return uni.$u.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 uni.$u.sleep(30)
|
||
// #ifndef APP-NVUE
|
||
this.$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> |