iOS中的「解析問題 - 預期聲明」

Question

我的代碼顯示「Parse Issue - Expected Statement」錯誤，我不知道需要更改或添加哪些內容才能解決問題。

-(IBAction)email { 
    MFMailComposeViewController *composer = [[MFMailComposeViewController alloc] init]; 
    [composer setMailComposeDelegate:self]; 
    if ([MFMailComposeViewController canSendMail]) { 
     [composer setToRecipients:[NSArray arrayWithObjects:@"matt_srfgtr@hotmail.com", nil]]; 
     [composer setSubject:@"subject here"]; 
     [composer setMessageBody:@"message here"isHTML:NO]; 
     [composer setModalTransitionStyle:UIModalTransitionStyleCoverVertical]; 
     [self presentViewController:composer animated:YES completion:nil]; 
    } 
    else 
     } 

預期的語句錯誤顯示了這個大括號^

-(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error { 
    if (error) { 
     UIAlertView *alert = [[UIAlertView alloc] 
           initWithTitle:@"error" 
           message:[NSString stringWithFormat:@"error %@", [error description]] 
           delegate:nil cancelButtonTitle:@"dismiss" otherButtonTitles:nil, nil]; 
     [alert show]; 
     [self dismissViewControllerAnimated:YES completion:nil]; 
    } 
    else { 
     [self dismissViewControllerAnimated:YES completion:nil]; 
    } 

Answer 1

試試這個代碼：

-(IBAction)email { 
    MFMailComposeViewController *composer = [[MFMailComposeViewController alloc] init]; 
    [composer setMailComposeDelegate:self]; 
    if ([MFMailComposeViewController canSendMail]) { 
     [composer setToRecipients:[NSArray arrayWithObjects:@"matt_srfgtr@hotmail.com", nil]]; 
     [composer setSubject:@"subject here"]; 
     [composer setMessageBody:@"message here"isHTML:NO]; 
     [composer setModalTransitionStyle:UIModalTransitionStyleCoverVertical]; 
     [self presentViewController:composer animated:YES completion:nil]; 
    } 
    else { 

    } 
} 

-(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error { 
    if (error) { 
     UIAlertView *alert = [[UIAlertView alloc] 
           initWithTitle:@"error" 
           message:[NSString stringWithFormat:@"error %@", [error description]] 
           delegate:nil cancelButtonTitle:@"dismiss" otherButtonTitles:nil, nil]; 
     [alert show]; 
     [self dismissViewControllerAnimated:YES completion:nil]; 
    } 
    else { 
     [self dismissViewControllerAnimated:YES completion:nil]; 
    } 
} 

Answer 2

問題就出在你的-(IBAction)email方法。它有一個沒有括號的else語句。只要將其刪除並重新運行即可。

-(IBAction)email { 
    MFMailComposeViewController *composer = [[MFMailComposeViewController alloc] init]; 
    [composer setMailComposeDelegate:self]; 
    if ([MFMailComposeViewController canSendMail]) { 
     [composer setToRecipients:[NSArray arrayWithObjects:@"matt_srfgtr@hotmail.com", nil]]; 
     [composer setSubject:@"subject here"]; 
     [composer setMessageBody:@"message here"isHTML:NO]; 
     [composer setModalTransitionStyle:UIModalTransitionStyleCoverVertical]; 
     [self presentViewController:composer animated:YES completion:nil]; 
    } 
}