UIProgressHUD

@interface UIProgressHUD : NSObject
- (void) show: (BOOL) yesOrNo;
- (UIProgressHUD *) initWithWindow: (UIView *) window;
@end
@interface HelloController : UIViewController
@end
@implementation HelloController
- (void) killHUD: (id) aHUD
{
 [aHUD show:NO];
 [aHUD release];
}
- (void) presentSheet
{
 id HUD = [[UIProgressHUD alloc] initWithWindow:self.view];
    [HUD setText:@"Downloading File. Please wait."];
    [HUD show:YES];
    [self performSelector:@selector(killHUD:) withObject:HUD afterDelay:5.0];
}