檢索的UIAlertView中

Question

竊聽按鈕我有這個代碼在我的應用程序運行，而現在在iOS 6崩潰我的應用程序：

// Another method 
[NSThread detachNewThreadSelector:@selector(askServerForNFeID) 
      toTarget:self withObject:nil]; 

- (void)askServerForNFeID { 
    if ([response isEqualToString:@"XXXX"]) { 
     NSString *responseMessage = [NSString stringWithFormat: 
             NSLocalizedString(@"Autorizado o Uso da NFe\n para chave:\n%@", @""), 
             [invoiceInfo NFeID]]; 

     UIAlertView *alert = [[UIAlertView alloc] 
       initWithTitle:NSLocalizedString(@"Sefaz respondeu:", @"") 
        message:responseMessage 
        delegate:self 
      cancelButtonTitle:NSLocalizedString(@"OK", @"") 
      otherButtonTitles:nil]; 

     [alert show]; 
     [alert release]; 
    } 
} 

我已經瞭解到，呼籲從第二個線程警報導致崩潰，和所以我改變了我的代碼來調用從主線程像這樣的警告：

if ([response isEqualToString:@"XXXX"]) { 

    [self performSelectorOnMainThread:@selector(showAlertHelper:) 
      withObject:[[NSArray alloc] initWithObjects: 
      NSLocalizedString(@"Não posso seguir em frente", @""), 
      NSLocalizedString(@"Você usou .....", @""), @"Fechar", @"Comprar", nil] 
      waitUntilDone:YES]; 

注意我解析標題，消息和按鈕的列表showAlertHelper ...

-(void)showAlertHelper:(NSArray*)theArray{ 

    if ([[theArray objectAtIndex:3] isEqualToString:@""]) { 
     UIAlertView *alertView = [[UIAlertView alloc] 
       initWithTitle:[theArray objectAtIndex:0] 
        message:[theArray objectAtIndex:1] 
        delegate:nil 
      cancelButtonTitle:[theArray objectAtIndex:2] 
      otherButtonTitles:nil]; 
     [alertView show]; 
     [alertView release]; 
    } 
    else { 
     UIAlertView *alertView = [[UIAlertView alloc] 
      initWithTitle:[theArray objectAtIndex:0] 
        message:[theArray objectAtIndex:1] 
        delegate:nil 
     cancelButtonTitle:[theArray objectAtIndex:2] 
     otherButtonTitles:[theArray objectAtIndex:3], nil]; 

     [alertView show]; 
     [alertView release]; 
    } 
} 

現在我的問題是，我有這個處理程序來捕獲按鈕，竊聽，它不再工作。它只是不叫：

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { 
    NSString *title = [alertView buttonTitleAtIndex:buttonIndex]; 

    if ([title isEqualToString:NSLocalizedString(@"Comprar", @"")]) { 
     // Do stuff to buy credits... 
    } else if ([title isEqualToString:NSLocalizedString(@"Fechar", @"")]) { 
     NSLog(@"Fechar was selected."); 
    } 
    else if ([title isEqualToString:NSLocalizedString(@"Criar conta", @"")]) { 
     // Do stuff to create an account... 
    } 
} 

Answer 1

的問題是，在你重新編寫方法，您將代理設置爲nil而不是self。因此，不調用alertView:clickedButtonAtIndex:委託方法。你的代碼更改爲以下：通過在delegate:參數指定self：

-(void)showAlertHelper:(NSArray*)theArray{ 

    if ([[theArray objectAtIndex:3] isEqualToString:@""]) { 
     UIAlertView *alertView = [[UIAlertView alloc] 
       initWithTitle:[theArray objectAtIndex:0] 
        message:[theArray objectAtIndex:1] 
        delegate:self 
      cancelButtonTitle:[theArray objectAtIndex:2] 
      otherButtonTitles:nil]; 
     [alertView show]; 
     [alertView release]; 
    } else { 
     UIAlertView *alertView = [[UIAlertView alloc] 
      initWithTitle:[theArray objectAtIndex:0] 
        message:[theArray objectAtIndex:1] 
        delegate:self 
     cancelButtonTitle:[theArray objectAtIndex:2] 
     otherButtonTitles:[theArray objectAtIndex:3], nil]; 

     [alertView show]; 
     [alertView release]; 
    } 
} 

Answer 2

您從UIAlertView中的創建方法去除委託

UIAlertView *alertView = [[UIAlertView alloc] 
     initWithTitle:[theArray objectAtIndex:0] 
       message:[theArray objectAtIndex:1] 
       delegate:nil 
    cancelButtonTitle:[theArray objectAtIndex:2] 
    otherButtonTitles:[theArray objectAtIndex:3], nil]; 

應該

UIAlertView *alertView = [[UIAlertView alloc] 
     initWithTitle:[theArray objectAtIndex:0] 
       message:[theArray objectAtIndex:1] 
       delegate:self 
    cancelButtonTitle:[theArray objectAtIndex:2] 
    otherButtonTitles:[theArray objectAtIndex:3], nil];