Tabbar環境中的通知提醒

Question

我有一個關於在應用程序內部顯示本地通知提醒的問題。我認爲問題在於視圖控制器。

這裏是我到目前爲止的代碼：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 

    UIViewController *viewController1, *viewController2; 
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) { 
     viewController1 = [[Number1ViewController alloc] initWithNibName:@"Number1ViewController_iPhone" bundle:nil]; 
     viewController2 = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController_iPhone" bundle:nil]; 
    } else { 
     viewController1 = [[Number1ViewController alloc] initWithNibName:@"Number1ViewController_iPad" bundle:nil]; 
     viewController2 = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController_iPad" bundle:nil]; 
    } 
    self.tabBarController = [[UITabBarController alloc] init]; 
    self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, nil]; 


     UILocalNotification *notification = [launchOptions objectForKey: 

              UIApplicationLaunchOptionsLocalNotificationKey]; 


     if (notification) { 

      NSString *stringReminder = [notification.userInfo 

             objectForKey:@"TextforReminder"]; 

      [viewController showReminder:stringReminder]; 


     } 


    } 



    application.applicationIconBadgeNumber = 0; 
    [[UIApplication sharedApplication] cancelAllLocalNotifications]; 


    self.window.rootViewController = self.tabBarController; 
    [self.window makeKeyAndVisible]; 
    return YES; 
} 

或：

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification { 

    UIApplicationState state = [application applicationState]; 

    if (state == UIApplicationStateInactive) { 

     application.applicationIconBadgeNumber = 0; 
     [[UIApplication sharedApplication] cancelAllLocalNotifications]; 


     NSString *stringReminder = [notification.userInfo 

            objectForKey:@"TextforReminder"]; 

     [viewController showReminder:stringReminder]; 

    } 

} 

關於視圖控制器但是我得到的錯誤。使用未聲明的標識符'viewController'。我明白，這是因爲沒有視圖控制器，但我並不是不知道該如何實現，而是在過程中顯示提醒。

非常感謝您的幫助，我沒有進一步解決這個問題。

乾杯

Answer 1

當你的警告是想告訴您的問題application:didFinishLaunchingWithOptions:在不在。

if (notification) { 
    NSString *stringReminder = [notification.userInfo objectForKey:@"TextforReminder"]; 
    [viewController showReminder:stringReminder]; 
} 
application.applicationIconBadgeNumber = 0; 
[[UIApplication sharedApplication] cancelAllLocalNotifications]; 

UIViewController沒有名爲showReminder:方法，所以我認爲它在你的UIViewController的一個子類子類。

你需要做兩件事情，

1）更換「viewController」以「viewController1」或「viewController2」不論選擇哪個方法showReminder:

2）您需要等到這些viewControllers實際上在屏幕上展示更多的視圖。所以將上面的塊移動到[self.window makeKeyAndVisible]之後但在return YES之前。

編輯爲評論說SettingViewController將有showReminder:方法;

只要在應用程序運行時收到LocalNotifications的問題。如果你的程序很簡單，那麼也許只是替換「viewController」：

(SettingsViewController *)[self.tabBarController.viewControllers objectAtIndex:1]

因爲在你的代碼中添加它作爲viewControllers屬性的第二個元素。