微信小程序上传图片、长按删除及预览图片

	也是电商里做的上传评论图片之类的，如果用根据我文章中需要改的改一下就可以用了

首先是wxml

<view class="conts">
  <view class="img_box">
    <view class="imgs" wx:for="{
  {tempFilePaths}}" wx:key="index">
      <image src='{
  {item}}' bindlongpress="deleteImage" bindtap="listenerButtonPreviewImage" data-index="{
  {index}}" mode='widthFix' />
    </view>
    <view class="imgs">
      <view class="images" bindtap="upload">
        <image src='/pages/img/shangchuantupian_l.png' mode='widthFix' />
      </view>
    </view>
  </view>

  <view class="upload-img">上传图片</view>
</view>

接下来是wxss

.conts {
  height: auto;
  position: relative;
  margin: 0 auto;
  back