如何關閉UIAlertController（無需按鈕）

Question

我使用UIAlertController和UIActivityIndi​​catorView作爲我的加載指示器，它會關閉，直到我的應用程序獲得服務器響應。但是，當我的服務器或網絡出現問題時，我的應用永遠不會得到響應，我無法從AlertView取回我的控制權，我想知道是否有某種方法可以通過觸摸屏幕關閉此AlertView。 而我的UIAlertView沒有標題和任何按鈕。 任何提示都會很感激。

墜毀，當我觸摸屏幕，下面是我的代碼：

UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil 
                 message:@"正在裝載頁面...\n\n" 
                 preferredStyle:UIAlertControllerStyleAlert]; 
UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
spinner.center = CGPointMake(130.5, 65.6); 
spinner.color = [UIColor darkGrayColor]; 
[spinner startAnimating]; 
[alert.view addSubview:spinner]; 
UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc]initWithTarget:alert action:@selector(stopWaiting)]; 
[alert.view addGestureRecognizer:recognizer]; 

Answer 1

您的報警控制器保存到某些屬性（例如，alertController），並與

[self.alertController dismissViewControllerAnimated:YES completion:nil]; 

要做到關閉它通過觸摸警報添加輕擊手勢識別器來alertController的視圖：

- (void)showAlert { 
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"" 
                      message:@"Some message" 
                     preferredStyle:UIAlertControllerStyleAlert]; 
    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self 
                          action:@selector(closeAlert)]; 
    [alertController.view addGestureRecognizer:tapGestureRecognizer]; 
    self.alertController = alertController; 

    [self presentViewController:alertController animated:YES completion:nil]; 
} 

- (void)closeAlert { 
    [self.alertController dismissViewControllerAnimated:YES 
              completion:nil]; 
}