Laying out & sizing of subviews in a UIViewController

You can do your layout logic inside the viewWillLayoutSubviews of the UIViewController.

-(void)viewWillLayoutSubviews{
    [super viewWillLayoutSubviews];
    // Your layout logic here
}

DOC: Called just before the view controller’s view’s layoutSubviews method is invoked. Subclasses can implement as necessary. The default is a nop.