Question

Newbie question for iOS — I’m really confused with how navigation view works in a tabview.

Right now I have a tabview that has 2 views. In the second tab I have a button. When the button is clicked I’d like a new window to show up with some information, and the new window needs a Back button on top that goes back to the second tab.

I followed some tutorials and put a NavigationController in secondTab.xib, added the line

@property (nonatomic, retain) IBOutlet UINavigationController *navController; 

to secondTab.h, and

NewWindowController *newWindow = [[NewWindowController alloc] initWithNibName:@"NewWindowController" bundle: nil];
[self.navController pushViewController:newWindow animated:YES];
NSLog(@"clicked");

to my button implementation for -(IBAction) click: (id)sender

When I clicked the button in my second tab, the log shows “clicked” but my view is not changing.

Is there some setting I need to change for File’s Owner/Navigation Controller outlets/referencing outlets etc…?

Thanks!

Answer 1

You don’t want a property for the UINavigationController, you want to push onto the current navigation controller like so:

NewWindowController *newWindow = [[NewWindowController alloc] initWithNibName:@"NewWindowController" bundle: nil];
[self.navigationController pushViewController:newWindow animated:YES];
NSLog(@"clicked");

When a UIViewController is associated with a UINavigationController (i.e. it’s part of a navigation controller hierarchy) then its navigationController property will be set, so you can access it like I’ve shown.