objective c - Show activity indicator during application launch

Question

I am trying to add an activity indicator during startup. I did have a launch image, but I'd rather have just an indicator alone. I added the following to my app delegate, but the indicator doesn't appear.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // *******Create activity indicator****
    UIActivityIndicatorView *activity = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(225, 115, 30, 30)];
    [activity setBackgroundColor:[UIColor clearColor]];
    [activity setActivityIndicatorViewStyle: UIActivityIndicatorViewStyleGray];
    [window addSubview: activity];
    [activity release];

    [activity startAnimating];
    activity.hidden = FALSE;
    // *******End activity indicator****

    MainViewController *viewController = [[MainViewController alloc] initWithNibName:@"MainView" bundle:nil];
    self.mainViewController = viewController;

    [window addSubview:[mainViewController view]];
    mainViewController.view.frame = CGRectMake(0, 20, 320, 411);

    [window addSubview:[rootController view]];
    [window makeKeyAndVisible];
#if !TARGET_IPHONE_SIMULATOR
    [application registerForRemoteNotificationTypes: 
     UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound];
#endif

    application.applicationIconBadgeNumber = 0;

    // Hide indicator
    [viewController release];
    activity.hidden = TRUE;

    [activity stopAnimating];
    return YES;
}

I visited this question from back in 2009, but the solution didn't work for me. iPhone-SDK:Activity Indicator during Startup?

Answer 1

For all those who needed this, and i know there were many...
(Made on Xcode version 4.2.1)

So...

In the AppDelegate.h add this:

@property (nonatomic, strong) UIImageView *splashView;

In the AppDelegate.m add this:

On the top of the page of cours @synthesize splashView;
And then:

- (void) splashFade
{
    splashView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 320, 480)];
    splashView.image = [UIImage imageNamed:@"Default.png"];
    [_window addSubview:splashView];
    [_window bringSubviewToFront:splashView];
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:2.0];
    [UIView setAnimationDelay:2.5];
    [UIView setAnimationTransition:UIViewAnimationTransitionNone forView:_window cache:YES];
    [UIView setAnimationDelegate:self]; 
    [UIView setAnimationDidStopSelector:@selector(startupAnimationDone:finished:context:)];
    splashView.alpha = 0.0;
    [UIView commitAnimations];

    //Create and add the Activity Indicator to splashView
    UIActivityIndicatorView *activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
    activityIndicator.alpha = 1.0;
    activityIndicator.center = CGPointMake(160, 360);
    activityIndicator.hidesWhenStopped = NO;
    [splashView addSubview:activityIndicator];
    [activityIndicator startAnimating];
}

- (void)startupAnimationDone:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
    [splashView removeFromSuperview];
}

The [UIView setAnimationDelay:2.5] is responsible for how long the splashView will be in front by the delay time you choose.

You can change the position of the indicator by changing the nubmers of x/y in:
activityIndicator.center = CGPointMake(160, 360);

At last, under the methode:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

Just add this:

[self performSelector:@selector(splashFade) withObject:nil];

And there you go :)
Hope it helped.

Have a nice programming....