ios - appdelegate 如何使用 Storyboard推送 ViewController

Question

在我的应用程序委托(delegate)中，如果保存了用户详细信息，我会将用户推送到 View Controller

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  
  // cached user
    PFUser *currentUser = [PFUser currentUser];
    if (currentUser)
    {
        NSLog(@"current user signing and looking for VC %@", currentUser);
        // A user was cached, so skip straight to the main view

        UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
        TaskSelectionViewController*viewController = [[TaskSelectionViewController alloc] initWithUser:currentUser];
        [navigationController pushViewController:viewController animated:YES];

                NSLog(@"VC found");
            } else {
                NSLog(@"VC not found");
    }

TaskSelectionViewController.m

 -(id)initWithUser:(PFUser *)currentUser
{
NSLog(@"current user %@", currentUser);

NSLog(@"task Selection initwithuser");
return self;
 }

推送有效，但我得到的只是顶部的 NavigationController 栏和黑屏。

缺少什么？？

感谢您的帮助。

Answer 1

好的，使用 instantiateViewControllerWithIdentifier:@"ID"完成

UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle: nil];
TaskSelectionViewController *controller = (TaskSelectionViewController*)[mainStoryboard instantiateViewControllerWithIdentifier: @"task"];
[navigationController pushViewController:controller animated:YES];