How to add button in UINavigationController

You can write following code in ViewDidLoad method

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(newDate:)];

and also define the selector to get the user interaction response

This is the Selector of above right bar button

- (void) newDate: (id) sender{
}