WeChat 미니 프로그램에서 사진 정보를 얻는 방법

<view class="zn-uploadimg">  
  <image src="{{tempFilePaths}}" mode="aspecFill" style="width: 100%; height: 450rpx" />  
  <text>图片的大小：{{imgwidth}}px*{{imgheight}}px</text> 
</view>

var app = getApp()  
Page({ 
  data: {  
    tempFilePaths: '../uploads/foods.jpg', 
    imgwidth:0, 
    imgheight:0,  
  }, 
  onReady:function(){ 
    // 页面渲染完成  
    var _this = this;  
    wx.getImageInfo({ 
      src: _this.data.tempFilePaths, 
      success: function (res) { 
        _this.setData({ 
          imgwidth:res.width, 
          imgheight:res.height, 
        }) 
      } 
    })  
  }  
})

<view class="zn-uploadimg"> 
  <button type="primary"bindtap="chooseimage">获取图片</button>  
  <image src="{{tempFilePaths}}" mode="aspecFill" style="width: 100%; height: 450rpx"/>  
  <text>图片的大小：{{imgwidth}}px*{{imgheight}}px</text> 
</view>