微信小程序实现图片选择并预览功能

<view class="wrap"> <view class="contant_wrap"> <view class="contant">  <textarea name="bindTextAreaBlur" bindblur="bindTextAreaBlur" auto-height placeholder="请描述您的问题或意见(必填)" maxlength="600"/> </view> <view class="contant-pic">  <view class="pics-list" wx:for="{{pics}}" wx:key="" >  <image src="{{item}}" class="uploadImg"></image>  <image src="../../images/delete.png" class="uploadImg-error" data-img="{{item}}" bindtap='deleteImg'></image>  </view>  <image src="../../images/uploadImg.png" class="uploadImg {{isShow?'true':'hideTrue'}}" bindtap='uploadImage' ></image> </view> </view> <view class="phone"> <input name="inputPhone" bindinput="inputPhone" placeholder="您的手机号或者邮箱(选填)" /> </view> <view class="phone"> <input name="inputName" bindinput="inputName" placeholder="您的称呼(选填)" /> </view> <view class="bottom" bindtap='submitAdvice'> 保存</view></view>

page{ background-color: #efefef;}.wrap{ width:90%; margin-left:5%; margin-top:10px; font-size:15px;}.contant_wrap{ background-color: #fff;}.contant{ width: 94%; margin: 0 auto}textarea{ min-height:300rpx; max-height: 300rpx; padding: 10rpx 0; width: 100%; }.contant-pic{ width: 94%; margin: 0 auto; height:80px; }.pics-list{ width:73px; height:73px; float:left; margin-right:6px; }.uploadImg{ width:70px; height:70px;}.uploadImg-error{ height:25px; width:25px; position:relative; top:-80px; left:55px;}.hideTrue { display: none}.true { display: block}input{ margin-top: 30rpx; height: 80rpx; padding-left: 20rpx; background-color: #fff;}.placeholder{ color: #999999; font-size: 12pt;}.bottom{ width:100%; height:40px; background-color:#e64340; position:fixed; bottom:0; color:#ffff; text-align: center; line-height: 40px;}

// pages/advice/advice.jsPage({  /** 页面的初始数据*/ data: { content:'', phone:'', name:'', advice:'', pics:[], isShow: true }, /**获取textarea值：评论内容 */ bindTextAreaBlur:function(e){ this.setData({  advice:e.detail.value }) }, /**获取手机或邮箱*/ inputPhone: function (e) { this.setData({  phone: e.detail.value }) }, /**获取称呼 */ inputName: function (e) { this.setData({  name: e.detail.value }) },  /**上传图片 */ uploadImage:function(){ let that=this; let pics = that.data.pics; wx.chooseImage({  count:3 - pics.length,  sizeType: ['original', 'compressed'],   sourceType: ['album', 'camera'],   success: function(res) {  let imgSrc = res.tempFilePaths;   pics.push(imgSrc);  if (pics.length >= 3){   that.setData({   isShow: false   })   }  that.setData({   pics: pics  })  }, })  },  /**删除图片 */ deleteImg:function(e){ let that=this; let deleteImg=e.currentTarget.dataset.img; let pics = that.data.pics; let newPics=[]; for (let i = 0;i<pics.length; i++){  //判断字符串是否相等  if (pics[i]["0"] !== deleteImg["0"]){  newPics.push(pics[i])  } } that.setData({  pics: newPics,  isShow: true })  },  /**提交 */ submitAdvice:function(){ let that=this; let advice = that.data.advice let name=this.data.name let phone=this.data.phone let pics=this.data.pics //保存操作 }})