Question

Im loading a root view controller in landscape mode at launch(no interface builders are used).
In viewDidLoad, I am adding subviews to root view controllers view, like this

- (void)viewDidLoad
{
    [super viewDidLoad];

        // self.view.

    UIView *toolBar=[[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 50)]; 
    toolBar.backgroundColor=[UIColor darkGrayColor];

    [self.view addSubview:toolBar];
//code contiues...
}

but self.view.frame.size.width returns width of portrait mode instead of landscape.

thanks in advance

EDIT:

Answer 1

Implement the -loadView method:

- (void)loadView
{
    self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}

Also normally the parent view controller is responsible for setting the frame size of its children view controllers views. In the case of the root view controller, I believe it takes the size of the UIWindow it’s attached to (so if you set the window size in you app delegate, you can just use [[UIView alloc] init] and then set the autoresizing mask in the -loadView method).
You might need to take the status bar into account in the above code, depending on your own code.