这行代码:varerrorView=UIAlertView(title:errorTitle,message:errorString,delegate:self,cancelButtonTitle:"Cancel",otherButtonTitles:"OK",nil)重写自Objective-C代码:UIAlertView*errorView=[[UIAlertViewalloc]initWithTitle:errorTitlemessage:errorStringdelegate:selfcancelButtonTitle:nilotherButtonTitles:@"OK",ni