禁用警報視圖連接到互聯網時

-2

我有一個警報視圖，當沒有互聯網連接時彈出。當有互聯網連接時，我有辦法禁用它...。 工作代碼：禁用警報視圖連接到互聯網時

-(void)reachabilityChanged:(NSNotification*)note 

    { 
     Reachability * reach = [note object]; 

     if([reach isReachable]) 
     { 
      notificationLabel.text = @"Notification Says Reachable"; 
      NSLog(@"Internet is Up"); 



     } 
     else 
     { 
      notificationLabel.text = @"Notification Says Unreachable"; 
      NSLog(@"Internet is Down"); 
      UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Please connect to Internet" 
                  message:nil 
                  delegate:self 
                cancelButtonTitle:nil 
                otherButtonTitle:nil 
      [alert show]; 
     } 
    } 

-(void)dismissAlert:(UIAlertView *)alertView{ 
      [alertView dismissWithClickedButtonIndex:0 animated:YES];

}

來源

2012-11-22 Programmer...

你可以保持alertView作爲實例變量，然後調用didDismissWithButtonIndex你的伊娃。所以，你可以在你的viewDidLoad中的Alloc警報後使用它：

-(void)reachabilityChanged:(NSNotification*)note{ 
     Reachability * reach = [note object]; 
     if([reach isReachable]) 
     { 
      notificationLabel.text = @"Notification Says Reachable"; 
      NSLog(@"Internet is Up"); 
      [self performSelector:@selector(dismissAlert:) withObject:alert afterDelay:0]; 
     } 
     else 
     { 
      notificationLabel.text = @"Notification Says Unreachable"; 
      NSLog(@"Internet is Down"); 
      //or you can realloc here your alert 
      UIActivityIndicatorView *progress= [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(125, 50, 30, 30)]; 
      progress.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge; 
      [alert addSubview:progress]; 
      [progress startAnimating]; 
      [alert show]; 
     } 
    } 

    -(void)dismissAlert:(UIAlertView *)alertView{ 
       [alertView dismissWithClickedButtonIndex:0 animated:YES]; 
    }

並確保在你的頭文件來實現UIAlertViewDelegate。

來源

2012-11-22 22:06:21 Mat

您的簡化版，代碼甚至顯示警報視圖...。 –

我想在有互聯網連接時禁用警報視圖...。 –

如果您已經注意到，我在代碼的末尾添加了一種方法，可以讓您關閉警報。在if語句中（所以當有互聯網連接時），就會調用該方法。你在頭文件中實現了'UIAlertViewDelegate'嗎？ – Mat

（無效）alertView：（UIAlertView中*）alertView didDismissWithButtonIndex：（NSInteger的）buttonIndex

與駁回buttonIndex 0.

來源

2012-11-22 21:44:48 Larme

- （空）alertView：（UIAlertView中*）alertView didDismissWithButtonIndex：（NSInteger的）buttonIndex { 如果（buttonIndex == 0）{ } } –

沒有什麼事情發生... –

您可以關閉UIAlertView s的下列實例方法：

- (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated

即

[alert dismissWithClickedButtonIndex:0 animated:YES];

當然，你需要先找到該警報的視圖的引用。

UIAlertView class reference

來源

2012-11-22 21:57:29 ohr

禁用警報視圖連接到互聯網時

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