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

  
    
      
        
          图片上传
          {{files.length}} / 9
        
        
          
            
              
                
              
            
          
          
            
          
        
      
    
  

Page({
  data: {
    files: []
  },
  chooseImage: function(e) {
    var that = this;    var images = that.data.files;
    wx.chooseImage({
      count: 9 - images.length,
      sizeType: ['original', 'compressed'],
      sourceType: ['album', 'camera'],
      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: '系统提醒',
      content: '确定要删除此图片吗？',
      success: function(res) {
        if (res.confirm) {
          images.splice(index, 1);
        } else if (res.cancel) {          return false;
        }
        that.setData({
          files: images
        });
      }
    })
  }
})