详解微信小程序图片地扯转base64解决方案

let $this = this;request({   url:'https://www.dounine.com/hello.jpg',   method:'GET',   responseType: 'arraybuffer',   success:function(res){    let base64 = wx.arrayBufferToBase64(res);    $this.data.userImageBase64 = 'data:image/jpg;base64,' + base64;;   }}); 

<image src='{{userImageBase64}}' style='width:90rpx;height:90rpx;' />

  wx.chooseImage({   success: function(res) {    console.log(wx.getFileSystemManager().readFileSync(res.tempFilePaths[0], "base64"))   },  })