error when i am calling next view controller - iphone

Question

i am getting an error when i am calling next view controller, i want to call a view controller that a action continue .this screen will come appear first time only when we run first time.
controller is not going next view.
-(void)viewDidLoad
{
welcomePage *temp = [[welcomePage alloc]initWithNibName:#"welcomePage" bundle:nil];
[self presentViewController:temp animated:YES completion:^(void){}];
}
Warning: Attempt to present on whose view is not in the window hierarchy!

Answer 1

Try this one..
You change the code in Appdelegate.m didFinishLaunchingWithOptions method like this
self.viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:self.viewController];
self.window.rootViewController = nav;
And in your ViewDidLoad method like this..
welcomePage *temp = [[welcomePage alloc]initWithNibName:#"welcomePage" bundle:nil];
[self.navigationController presentViewController:temp animated:YES completion:nil];
For dismissing viewcontroller you can write following code in welcomepage button action
-(IBAction)dismiss:(id)sender{
[self dismissViewControllerAnimated:YES completion:nil];
}

Answer 2

use this code
-(void)viewDidLoad
{
welcomePage *temp = [[welcomePage alloc]initWithNibName:#"welcomePage" bundle:nil];
[self presentViewController:temp animated:YES completion:nil];
}

Answer 3

That error means you are trying to present a modal view controller from a view controller that is not currently in the screen.

Answer 4

If You are using Storyboard : Use this
instantiateViewControllerWithIdentifier
UIViewController objController = [self.storyboard instantiateViewControllerWithIdentifier:#"StoryBoard Id"];
[self presentViewController:objController animated:YES completion:nil];
To Set Storybaord ID , Check Here .

Answer 5

This error means that you are trying to present 'welcome page' from a view that is not on the screen yet.
Knowing that simply moving the code to the viewDidAppear method doesn't work for you, what you can try to do is this:
-(void)viewDidAppear
{
[self presentWelcome];
}
- presentWelcome {
welcomePage *temp = [[welcomePage alloc]initWithNibName:#"welcomePage" bundle:nil];
[self presentViewController:temp animated:YES completion:^(void){}];
}
What happens here is that when the view appears (so when it is in the view hierarchy), the controller starts a function that calls the other viewController. hope this solves your problem.
Hope this helps you!