Tabbar环境下的通知提醒

Question

我有一个关于在应用程序内显示本地通知提醒的问题。我认为问题出在视图控制器上。

这是我到目前为止的代码：

- (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;
}

或者：

- (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];

    }

}

但是我收到了有关视图控制器的错误。使用未声明的标识符“viewController”。我知道这是因为没有视图控制器，但是我不明白我必须如何实现，提醒显示在过程中。

非常感谢您的帮助，我在这个问题上没有进一步解决。

干杯

Answer 1

由于您的警告试图告诉您 application:didFinishLaunchingWithOptions: 中的问题所在。

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

UIViewController 没有名为 showReminder: 的方法，所以我假设它位于您的 UIViewController 子类之一的子类中。

您需要做两件事，

1）将“viewController”替换为“viewController1”或“viewController2”（以具有方法为准） showReminder:

2) 您需要等到这些 viewController 真正出现在屏幕上，然后才能在它们之上呈现更多视图。因此，将上面的块移至 [self.window makeKeyAndVisible] 之后、return YES 之前。

编辑评论说 SettingViewController 将具有 showReminder: 方法；

至于应用程序运行时接收 LocalNotifications 的问题。如果您的应用程序很简单，那么也许只需将 'viewController' 替换为：

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

因为在您的代码中您将其添加为viewControllers 属性的第二个元素。