//把base64轉(zhuǎn)換成圖片
  getBase64ImageUrl(data) {
    // 獲取到base64Data
    var base64Data = data;
    /// 通過微信小程序自帶方法將base64轉(zhuǎn)為二進制去除特殊符號，再轉(zhuǎn)回base64
    base64Data = wx.arrayBufferToBase64(wx.base64ToArrayBuffer(base64Data));
    /// 拼接請求頭，data格式可以為image/png或者image/jpeg等，看需求
    const base64ImgUrl = "data:image/png;base64," + base64Data;
    /// 刷新數(shù)據(jù)
   // console.log(base64ImgUrl)
    this.setData({
      baseImgUrl:base64ImgUrl
    })
  }