Add UIActivityIndicatorView to UINavigationBar
For me it took sometime to figure out how to show activity indicator in the navigation bar. Later I found it was very simple. When you push a view to the navigation you get to play with navigationItem property on the view that is being pushed. In your viewWillAppear method you can add this code.
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-(void)viewWillAppear:(BOOL)animated{ [super viewWillAppear:YES]; //Create an instance of activity indicator view UIActivityIndicatorView * activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)]; //set the initial property [activityIndicator stopAnimating]; [activityIndicator hidesWhenStopped]; //Create an instance of Bar button item with custome view which is of activity indicator UIBarButtonItem * barButton = [[UIBarButtonItem alloc] initWithCustomView:activityIndicator]; //Set the bar button the navigation bar [self navigationItem].rightBarButtonItem = barButton; //Memory clean up [activityIndicator release]; [barButton release]; } |
I have done a sample application demonstrating this code. It is based on iPhone navigation project template. In the application I have two action to start and stop the animation.
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-(IBAction)startActivity:(id)sender{ //Send startAnimating message to the view [(UIActivityIndicatorView *)[self navigationItem].rightBarButtonItem.customView startAnimating]; } -(IBAction)stopActivity:(id)sender{ //Send stopAnimating message to the view [(UIActivityIndicatorView *)[self navigationItem].rightBarButtonItem.customView stopAnimating]; } |
Screen shot of the application
Download Load Activity Indicator Xcode project files.
