Question

From the standard view-based application, I found that the generated code did this:

self.window.rootViewController = self.viewController;

So I take it as such that the AppDelegate (self) has a local variable (declared property) named viewController, which is a subclass of UIViewController, and the self.window.rootViewController is pointed towards this view controller.

When a button is clicked on the screen, I would like to jump to a new view.

Now I have created a new subclass of UIViewController, say abcViewController, and a xib file which represents the view. Should I:

(1) replace “viewController” with “abcViewController” so that it becomes the new Application Delegate’s window’s new rootViewController

or

[self.view removeFromSuperview];
[self.parentViewController.view addSubview:abcViewController];

Do I add/remove the view directly, or should I swap the view controllers, then do something to change the view within that view controller? Do I also need a new subclass of UIViewController for every view that I would like to add to the App?

Answer 1

Do like this.

In viewController class on which event you want to switch the view at there use this,

-Make object of appDelegate class,
-then on this object access the window .
-Make object for new view
-and add it on window.

see this,

    YourAppDelegate *obj=(YourAppDelegate *)[[UIApplication sharedApplication] delegate]; 

abcViewController *objAbc=[[[abcViewController alloc] initWithNibName:@"abcViewController" bundle:nil] autorelease];

    [obj.window addSubview:objAbc.view];