[self.navigationController pushViewController：ngView animated：YES]; 不工作

Question

If i use

 NGViewController *ngView = [[NGViewController alloc]initWithNibName:Nil bundle:Nil];
[self presentViewController:ngView animated:NO completion:nil];

above code the controller will go to NGViewController page.

But if I use this navigation controller

NGViewController *ngView = [[NGViewController alloc]initWithNibName:Nil bundle:Nil];
[self.navigationController pushViewController:ngView animated:YES];

the Controller will be in same page.

Can any one tell that what's the problem.

Answer 1

You should use this code

NGViewController *ngView = [[NGViewController alloc]initWithNibName:Nil bundle:Nil];
[self presentViewController:ngView animated:NO completion:nil];

after writting this line when then you you want go on different page with push view controller

UINavigationController *navigationController = [[UINavigationController       alloc]initWithRootViewController:ngView];

[self.navigationController pushViewController:navigationController animated:YES];

I hope you will solve this issue by this code Good luck

Answer 2

Your self.navigationController is probably nil - check it out through debugging. Your self view controller is not within a UINavigationController .

Answer 3

Now im using this code

 NGViewController *ngView = [[NGViewController alloc]initWithNibName:Nil bundle:Nil];
 [UIView beginAnimations:nil context:NULL];
 [UIView setAnimationDuration: 0.50];
 [self presentViewController:ngView animated:NO completion:nil];

so that it wil give same effect other

Answer 4

自控器应具有导航控制器（在故事板中）以便导航。

[self.navigationController pushViewController:nextController animated:YES];

Answer 5

UINavigationController is a controller of controllers and it is designed to allow you to push and pop controllers and manage a hierarchy of your view's. And your navigationController property tells you whether your NGViewController is currently in a UINavigationController's hierarchy; if not (as in this case), the navigationController property returns nil .

Answer 6

You have to create your own navigation controller and then try to push the view controllers and thus build up a view hierarchy. I normally would suggest this:

 UINavigationController *navigationController = [[UINavigationController       alloc]initWithRootViewController:firstviewController];
[self.window setRootViewController:navigationController];
navigationController.delegate = self;
navigationController.navigationBarHidden = YES;

Answer 7

you need to declare this in your first controller

NGViewController *ngView = [[NGViewController alloc]init];
[self.navigationController pushViewController:ngView animated:YES];