vant uploader实现上传图片拖拽功能(设为封面)
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效果图如下所示：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="public/vant/index.css" rel="external nofollow" >
<script class="lazy" data-src="public/vue.min.js"></script>
<script class="lazy" data-src="public/vant/vant.min.js"></script>
<script class="lazy" data-src="public/sortable/Sortable.min.js"></script>
<script class="lazy" data-src="public/draggle/vuedraggable.umd.js"></script>
</head>
<style>
.img_uploader{display: flex;}
.img_upload span {display: -webkit-box;display: -webkit-flex;display: flex;-webkit-flex-wrap: wrap;flex-wrap: wrap;}
.img_upload_item {position: relative;margin: 0 8px 8px 0;cursor: pointer;}
.preview-cover {position: absolute;bottom: 0;box-sizing: border-box;width: 100%;padding: 4px;color: #fff;font-size: 12px;text-align: center;background: rgba(0, 0, 0, 0.3);}
.van-image__error,.van-image__img,.van-image__loading {object-fit: cover;}
</style>
<body>
<div id="app">
<div class="img_uploader">
<van-uploader :after-read="onRead"> </van-uploader>
<draggable class="img_upload" v-model="fileList" :group="{name:'imgs'}" @end="end" animation="200">
<transition-group>
<div class="img_upload_item" v-for="(item,index) in fileList" :key="index" @click="previewImg(fileList,index)">
<div class="van-image van-uploader__preview-image">
<img :class="lazy" data-src="item.content" alt="图片" class="van-image__img">
<div class="van-uploader__preview-cover">
<div class="preview-cover van-ellipsis" v-if="index == 0">封面图</div>
</div>
</div>
<div class="van-uploader__preview-delete" @click="delImg(index)">
<i class="van-icon van-icon-cross van-uploader__preview-delete-icon"></i>
</div>
</div>
</transition-group>
</draggable>
</div>
</div>
</body>
<script>
var app = new Vue({
el: "#app",
components: {
vuedraggable: window.vuedraggable, //当前页面注册拖拽组件
},
data() {
return {
fileList: [
{content: 'https://img01.yzcdn.cn/vant/leaf.jpg',name: '12'},
{content: 'images/banner1.png',name: '12'},
{content: 'images/banner2.png',name: '12'},
{content: 'images/banner3.png',name: '12'},
{content: 'images/banner4.png',name: '12'},
],
}
},
methods: {
// 删除图片
delImg(index) {
if (isNaN(index) || index >= this.fileList.length) {
return false
}
let tmp = []
for (let i = 0, len = this.fileList.length; i < len; i++) {
if (this.fileList[i] !== this.fileList[index]) {
tmp.push(this.fileList[i])
}
}
this.fileList = tmp
},
onRead(file) { // 上传图片到图片服务器
this.fileList.push(file)
console.log(file)
},
// 点击预览
previewImg(images, index) {
let listclass="lazy" data-src = [];
this.fileList.forEach(function(v,i){
listclass="lazy" data-src.push(v.content)
})
vant.ImagePreview({
images:listclass="lazy" data-src,
startPosition: index,
closeable:true
});
},
// 拖拽结束后 获取刚刚拖动的数据
end(e) {
var _oldIndex = e.oldIndex
var _oldItem = this.fileList[_oldIndex]
console.log(_oldItem);
},
}
})
</script>
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