How to add a right button to a UINavigationController?

Question

I am trying to add a refresh button to the top bar of a navigation controller with no success.

Here is the header:

@interface PropertyViewController          


        

Answer 1

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



}

-(void)refreshData{
    progressHud= [MBProgressHUD showHUDAddedTo:self.navigationController.view animated:YES];
    [progressHud setLabelText:@"拼命加载中..."];
    [self loadNetwork];
}