微信小程序实现上传图片裁剪图片过程解析

<view class="wancll-padded-15 wancll-bg-white wancll-font-size-14">
 <view class="wancll-padded-l-5 wancll-padded-b-10">商品图片:</view>
 <view class="comlist-image is-flex wancll-padded-l-5">
  <view class='image-list' wx:if="{{imgs.length}}" wx:for="{{imgs}}" wx:key="key">
   <zan-badge catchtap='deleltImage' data-id='{{index}}'>x</zan-badge>
   <view class='add-image' catchtap='previewImage' data-id='{{index}}'>
    <image class='up-img' src="{{item}}" mode="aspectFill" />
   </view>
  </view>
  <view class='add-image' catchtap='addImage'>+</view>
 </view>
</view>

.comlist-image{
 display: flex;
 flex-wrap: wrap
}
.comlist-image .image-list{
 margin-right: 20rpx;
}
.comlist-image .up-img{
 width: 100rpx;
 height: 100rpx;
}
.comlist-image .add-image{
 width: 100rpx;
 height: 100rpx;
 padding: 10rpx;
 display: flex;
 justify-content: center;
 align-items: center;
 border: 1px solid #ccc;
 border-radius: 5px;
 font-size: 50rpx;
}

data: {imgs:[]}

 // 添加图片
 addImage() {
  if (this.data.imgs.length>=5){
   APP.util.toast('商品图片不能超过5张')
   return
  }
  wx.chooseImage({
   count: 1,
   sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有
   sourceType: ['camera', 'album'], // 可以指定来源是相册还是相机，默认二者都有
   success: function (res) {
    // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片
    var tempFilePaths = res.tempFilePaths;
    wx.navigateTo({
     url: "/pages/UploadImg/index?src=" + tempFilePaths
    });
   }
  });

 },
 // 图片预览
 previewImage(e) {
  let id = APP.util.getDataSet(e, 'id')
  wx.previewImage({
   current: this.data.imgs[id],
   urls: this.data.imgs,
  })
 },
 // 删除预览图片
 deleltImage(e) {
  let id = APP.util.getDataSet(e, 'id')
  let arr = this.data.imgs
  arr.splice(id, 1);
  this.setData({
   imgs: arr
  })
 },