我在ios应用程序中使用数据存储dropbox sdk。
昨天我的申请工作，今天授权错误：
*** WebKit discarded an uncaught exception in the webView:decidePolicyForNavigationAction:request:frame:decisionListener: delegate: <NSInvalidArgumentException> Invalid object of type "NSNull" received.
2013-12-25 12:36:04.885 MCCoreData[11162:70b] [WARNING] DropboxSDK: error loading DBConnectController - Error Domain=NSURLErrorDomain Code=-1002 "unsupported URL" UserInfo=0x8cf5230 {NSErrorFailingURLStringKey=db-zsqvahc7cly3eop://1/connect?oauth_token=ylse13anatwjuyq9&oauth_token_secret=x9vg1ya77cvwadx&uid=3022092&state=47ce9e4d1c8f5128de8a25eedb5bb8fb, NSErrorFailingURLKey=db-zsqvahc7cly3eop://1/connect?oauth_token=ylse13anatwjuyq9&oauth_token_secret=x9vg1ya77cvwadx&uid=3022092&state=47ce9e4d1c8f5128de8a25eedb5bb8fb, NSLocalizedDescription=unsupported URL, NSUnderlyingError=0x8cf2280 "unsupported URL"}
我看到同样的问题，他在2个月前被问过，但没有人回答