从 AppDelegate 重定向到特定屏幕：点击通知

Question

对于消息应用程序。

结构是

TabBarController -> NavigationController->View_One -> View_Two. Whenever user tab on notification, i need to redirect to View_2 from appdelegate.m [DidReceiveRemoteNotification method].

当前代码帮助我登陆 View_One。如何在不影响 NavigationController 和 Tabbar 控制器功能的情况下转到 View_Two？

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler{
if(application.applicationState == UIApplicationStateInactive||application.applicationState == UIApplicationStateBackground){

    UIStoryboard *mainSB = [UIStoryboard storyboardWithName:MAIN_STORYBOARD bundle:nil];
    UITabBarController *tabBarController = [mainSB instantiateViewControllerWithIdentifier:TAB_BAR_ID];
    tabBarController.selectedIndex = 0;
    [[UIApplication sharedApplication].keyWindow setRootViewController:tabBarController];
    [self.window makeKeyAndVisible];
}

提前致谢。

Answer 1

试试这个

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler{
if(application.applicationState == UIApplicationStateInactive||application.applicationState == UIApplicationStateBackground){

    UIStoryboard *mainSB = [UIStoryboard storyboardWithName:MAIN_STORYBOARD bundle:nil];
    UITabBarController *tabBarController = [mainSB instantiateViewControllerWithIdentifier:TAB_BAR_ID];
    tabBarController.selectedIndex = 0;
    UINavigationController *nav = [tabBarController.viewControllers objectAtIndex:0];
    View2 *destViewController = (View2*) [self.nav.viewControllers objectAtIndex:0];
    [nav pushViewController:destViewController animated:YES];


}

选择 2

我不确定上述方法是否有效，在这里我们采用一些 hacky 方法，在这里根据您的代码我们使用 NSUSerdefault 概念

 -(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler{
if(application.applicationState == UIApplicationStateInactive||application.applicationState == UIApplicationStateBackground){

    UIStoryboard *mainSB = [UIStoryboard storyboardWithName:MAIN_STORYBOARD bundle:nil];
    UITabBarController *tabBarController = [mainSB instantiateViewControllerWithIdentifier:TAB_BAR_ID];
    tabBarController.selectedIndex = 0;
    [[NSUserDefaults standardUserDefaults]setObject:@"APNS" forKey:@"openVC"]
    [[UIApplication sharedApplication].keyWindow setRootViewController:tabBarController];
    [self.window makeKeyAndVisible];
}

检索喜欢

- (void)viewDidLoad // or call in loadView Method 
{
 if ([[[NSUserDefaults standardUserDefaults]objectForKey:@"openVC"]isEqualToString:@"APNS"])
{
 // Navigate to second VC
 }
 }

终于

在你的第二个 VC 上

 -(void)viewWillDisappear:(BOOL)animated
{
[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"openVC"];
[super viewWillDisappear:animated];
}

从 AppDelegate 重定向到特定屏幕：点击通知

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