Question

I am working on an app which has been created in Xcode 3.2.5. My app is working as expected in XCode 3.2.5 but because of some memory issues now I am using Xcode 4.2.

Xcode 4.2 offers a tool to convert existing code into ARC [which stands for Automatic Reference Counting.] enabled code . Select Edit -> Refactor… -> Convert to Objective-C ARC…worked for me.

In my code I am using navigationController to switch between views on UIbutton click.
UIButton created programmatically. I am using following code to push view controller on button_click:

 -(void) button_click:(id)sender{

NSLog(@"button_clicked.....");
SecondView  *sv = [[SecondView alloc] initWithNibName:@"SecondView" bundle:[NSBundle mainBundle]];

    [self.navigationController pushViewController:sv animated:NO];
}

On button_click console showing message button_clicked….. but pushViewcontroller not pushing SecondView.

pushViewController is working in XCode 3.2.5 but in XCode 4.2 button click is working but navigationController’s pushviewController is not working.

how can i fix it?

Any help would be greatly appreciated.

Thank you in advance!

Answer 1

Did you try putting the RootViewController into a navigation controller on the MainWindow.xib?

Addition to my answer:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    [self.window makeKeyAndVisible];

    // create the MyView controller instance:
    MyViewController *controller = [[MyViewController alloc] initWithNibName:@"MyView" bundle:nil];

    // set the title that appears in the navigation bar:
    [controller.navigationItem setTitle:@"Main View"];

    // create the Navigation Controller instance:
    UINavigationController *newnav = [[UINavigationController alloc] initWithRootViewController:controller];

    // set the navController property:
    [self setNavController:newnav];

    // release both controllers:
    [newnav release];
    [controller release];

    // add the Navigation Controller's view to the window:
    [window addSubview:[navController view]];

    return YES;
}

or

[self.window setRootViewController:navigationController];

[self.window makeKeyAndVisible];

Handling NavigationControllers is explained in detail here