wx.downloadFile({
      url: 'https:xxx/f12f.jpg', //僅為示例，并非真實的資源
      success: function (res) {
        // 只要服務器有響應數據，就會把響應內容寫入文件并進入 success 回調，業務需要自行判斷是否下載到了想要的內容
        if (res.statusCode === 200) {
          wx.saveImageToPhotosAlbum({
            title:"",
            filePath: res.tempFilePath,
            success(res) {
              ui.toast('保存圖片成功')
              that.setData({
                bol:true
              })
              // 保存圖片成功之后
              // 調用小程序的掃一掃功能
              // wx.scanCode({
              //   success(res) {
              //     console.log(res.result)
              //   }
              // })
            },
            fail(res) {
              console.log('fail')
              console.log(res)
              ui.toast('保存圖片失敗')

 

              wx.getSetting({
                success (res) {
                  console.log(res.authSetting)
                  res.authSetting = {
                    "scope.userInfo": true,
                    "scope.userLocation": true
                  }
                }
              })
            }
          })
        }
      }
    })
 
 
依然存在的bug  當用戶第一次拒絕時，第二次依然是拒絕
如果您的問題還未解決可以聯系站長付費協助。