小程序如何实现多图上传、图片预览效果？（代码示例）

wxml代码：

 <view class="weui-cell">   <view class="weui-cell__bd">    <view class="weui-uploader">      <view class="weui-uploader__hd">        <view class="weui-uploader__title">点击可预览选好的图片</view>        <view class="weui-uploader__info">{{pics.length}}/9</view>      </view>      <view class="weui-uploader__bd">        <view class="weui-uploader__files">          <block wx:for="{{pics}}" wx:for-item="image">            <view class="weui-uploader__file">              <image class="weui-uploader__img" src="{{image}}" src="{{image}}" bindtap="previewImage"></image>            </view>          </block>        </view><view class="delete-btn" data-index="{{index}}" catchtap="deleteImg"></view>        <!-- isShow 这个是判断是否进行触发点隐藏操作 -->        <view class="weui-uploader__input-box {{isShow?'true':'hideTrue'}}">          <view class="weui-uploader__input" bindtap="chooseImage"></view>        </view>      </view>    </view>  </view></view>

wxss代码：

page {  line-height: 1.6;  font-family: -apple-system-font, "Helvetica Neue", sans-serif;}icon {  vertical-align: middle;}.weui-cell {  padding: 10px 15px;  position: relative;  display: -webkit-box;  display: -webkit-flex;  display: flex;  align-items: center;}.weui-cell_input {  padding-top: 0;  padding-bottom: 0;}.weui-uploader__hd {  display: -webkit-box;  display: -webkit-flex;  display: flex;  padding-bottom: 10px;  align-items: center;}.weui-uploader__title {  flex: 1;}.weui-uploader__info {  color: #b2b2b2;}.weui-uploader__bd {  margin-bottom: -4px;  margin-right: -9px;  overflow: hidden;}.weui-uploader__file {  float: left;  margin-right: 9px;  margin-bottom: 9px;}.weui-uploader__img {  display: block;  width: 79px;  height: 79px;}.weui-uploader__input-box {  float: left;  position: relative;  margin-right: 9px;  margin-bottom: 9px;  width: 77px;  height: 77px;  border: 1px solid #d9d9d9;}.weui-uploader__input-box:before, .weui-uploader__input-box:after {  content: " ";  position: absolute;  top: 50%;  left: 50%;  transform: translate(-50%, -50%);  background-color: #d9d9d9;}.weui-uploader__input-box:before {  width: 2px;  height: 39.5px;}.weui-uploader__input-box:after {  width: 39.5px;  height: 2px;}.weui-uploader__input {  position: absolute;  z-index: 1;  top: 0;  left: 0;  width: 100%;  height: 100%;  opacity: 0;}.hideTrue {  disp软件开发
lay: none}

js代码：

var app = getApp();Page({  data: {    pics: [],    count: [1, 2, 3, 4, 5, 6, 7, 8, 9],    isShow: true  },  onLoad: function (options) {    // 生命周期函数--监听页面加载    isShow: (options.isShow == "true" ? true : false)  },  // 图片上传  chooseImage: function () {    var _this = this,      pics = this.data.pics;    wx.chooseImage({      count: 9 - pics.length, // 最多可以选择的图片张数，默认9      sizeType: ['original', 'compressed'], // original 原图，compressed 压缩图，默认二者都有      sourceType: ['album', 'camera'], // album 从相册选图，camera 使用相机，默认二者都有      success: function (res) {        // success        var imgSrc = res.tempFilePaths;   //图片路径        pics = pics.concat(imgSrc);   //选取的图片的地址数组        // 控制触发添加图片的最多时隐藏        if (pics.length >= 9) {          _this.setData({            isShow: (!_this.data.isShow)          })        } else {          _this.setData({            isShow: (_this.data.isShow)          })        }        _this.setData({          pics: pics        })      },      fail: function () {        // fail      },      complete: function () {        // complete      }    })  },  // 图片预览  previewImage: function (e) {    var current = e.target.dataset.src    wx.previewImage({      current: current,      urls: this.data.pics    })  } // 删除图片 deleteImg: function (e) {  var imgs = this.data.imgs;  var index = e.currentTarget.dataset.index;  imgs.splice(index, 1);  this.setData({   imgs: imgs  }); },uploadimg:function(){//这里触发图片上传的方法       var pics=this.data.pics;       app.uploadimg({           url:'https://........',//这里是你图片上传的接口           path:pics//这里是选取的图片的地址数组        });  },})              
              

            
小程序,多图上传,图片预览