dev.enekoalonso.com » reload http://dev.enekoalonso.com having fun with code Wed, 12 Oct 2011 21:40:17 +0000 en hourly 1 Placing a UIActivityIndicartorView on a UIBarButtonItem http://dev.enekoalonso.com/2009/07/26/placing-a-uiactivityindicartorview-on-a-uibarbuttonitem/ http://dev.enekoalonso.com/2009/07/26/placing-a-uiactivityindicartorview-on-a-uibarbuttonitem/#comments Sun, 26 Jul 2009 21:36:39 +0000 Eneko Alonso http://dev.enekoalonso.com/?p=347 Have you seen those iPhone apps with a reload button that switches itself to an animated activity indicator while the reload action is being performed?

Here is how to do that. Place this code on your ViewController:

  1. - (void)showReloadButton {
  2.   UIBarButtonItem *refreshItem = [[UIBarButtonItem alloc]
  3.     initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh
  4.                                         target:self
  5.                                         action:@selector(reload:)];
  6.   self.navigationItem.rightBarButtonItem = refreshItem;
  7.   [refreshItem release];
  8. }
  9.  
  10. - (void)showActivityIndicator {
  11.   UIActivityIndicatorView *activityIndicator =
  12.     [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
  13.   [activityIndicator startAnimating];
  14.   UIBarButtonItem *activityItem =
  15.     [[UIBarButtonItem alloc] initWithCustomView:activityIndicator];
  16.   [activityIndicator release];
  17.   self.navigationItem.rightBarButtonItem = activityItem;
  18.   [activityItem release];
  19. }
  20.  
  21. - (IBAction) reload {
  22.   // Do your reload stuff
  23. }

Seen here.

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