In the mini program, you can select a preview image and long-press to delete the image at the same time.-Mini Program Development-php.cn

In the mini program, you can select a preview image and long-press to delete the image at the same time.

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Release： 2018-08-10 14:18:37

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The content of this article is about the code that allows you to select preview images and long press to delete images in the mini program. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you. help.

I am currently working on a small program project. It is my first contact with it and I am learning while doing it. Currently, I am encountering problems related to image processing. I will record it here and provide some help to friends in need. Similar to posting pictures in WeChat Moments, long press the specified picture to delete

In the mini program, you can select a preview image and long-press to delete the image at the same time.
. Press and hold the picture to delete. If there are less than 9 pictures, you can continue to add

Picture preview effect

Implementation ideas:

Adjust the page to achieve the display effect
Use wx.chooseImage to take pictures and select photos
Use wx.previewImage to preview pictures
Use bindlongpress custom image deletion function

Without further ado, here’s the code:
wxml code

<view class="weui-cells">
  <view class="weui-cell">
    <view class="weui-cell__bd">
      <view class="weui-uploader">
        <view class="weui-uploader__hd">
          <view class="weui-uploader__title">图片上传</view>
          <view class="weui-uploader__info">{{files.length}} / 9</view>
        </view>
        <view class="weui-uploader__bd">
          <view class="weui-uploader__files" id="uploaderFiles">
            <block wx:for="{{files}}" wx:key="*this">
              <view class="weui-uploader__file" bindtap="previewImage" bindlongpress="deleteImage" id="{{item}}" data-index="{{index}}">
                <image class="weui-uploader__img" src="{{item}}" mode="aspectFill"/>
              </view>
            </block>
          </view>
          <view wx:if="{{files.length < 9}}" class="weui-uploader__input-box" >
            <view class="weui-uploader__input" bindtap="chooseImage"></view>
          </view>
        </view>
      </view>
    </view>
  </view></view>

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js Code

Page({
  data: {
    files: []
  },
  chooseImage: function(e) {
    var that = this;    var images = that.data.files;
    wx.chooseImage({
      count: 9 - images.length,
      sizeType: [&#39;original&#39;, &#39;compressed&#39;],
      sourceType: [&#39;album&#39;, &#39;camera&#39;],
      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
        that.setData({
          files: that.data.files.concat(res.tempFilePaths)
        });
      }
    })
  },
  previewImage: function(e) {
    wx.previewImage({
      current: e.currentTarget.id,
      urls: this.data.files
    })
  },
  deleteImage: function(e) {
    var that = this;    var images = that.data.files;    var index = e.currentTarget.dataset.index; //获取当前长按图片下标
    wx.showModal({
      title: &#39;系统提醒&#39;,
      content: &#39;确定要删除此图片吗？&#39;,
      success: function(res) {
        if (res.confirm) {
          images.splice(index, 1);
        } else if (res.cancel) {          return false;
        }
        that.setData({
          files: images
        });
      }
    })
  }
})

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