wx.getSetting({     success(res) {         if (!res.authSetting['scope.writePhotosAlbum']) {             wx.authorize({                 scope: 'scope.writePhotosAlbum',                 success() {                     // 申请授权成功                 },                 fail: err => {                     // 授权失败，若是用户取消授权，短时间内不会再弹出授权窗口                 }             })         } else {             // 已授权         }     },     fail: err => {              } })