How to add a UIActivityIndicator to a splash screen in a iphone application ?

Question

How to add a UIActivityIndicator to a splash screen ?

Edit : I tried the following things

I created UIViewController Sub class called SplashViewController. and the code is as below, still the image is not persisting long enough .

Answer 1

UIActivityIndicators are UIViews and can be added like any other.

something like: [myView addSubview:mySpinner];

Or just drop one in your NIB.

here's another answer: http://stackoverflow.com/questions/593234/how-to-use-activity-indicator-view-on-iphone

Answer 2

If by "Splash Screen" you mean the image that is displayed when your app launches, the answer is that you can't.

What you can do is have an initial view that includes a background image that looks just like your launch image, and then add an activity indicator into that view. To the user, it will appear that the activity indicator is "part" of your launch image.

The trick is to load your initial nib as quickly as possible (keep it small and simple) so the static images transitions to a view you can manipulate right away.

Answer 3

It depends on what you mean by a splash screen. If you mean the image that is first shown when the app is run, then we have a more tricky situation. This is just a static image (Default.png) so what you would then need to do is create a view that has your splash screen image as the background, add the activity indicator view on top of it, and then add that view directly from the app delegate. When whatever you're loading is done, you can get rid of this view and proceed with the rest of your program. Probably easier to do in a NIB, but here's an idea of it programmatically:

- (void)loadView;
{
    CGRect r = [UIScreen mainScreen].applicationFrame;
    UIView *activityView = [[[UIView alloc] initWithFrame:r] autorelease];
    self.view = activityView;

    activityView.backgroundColor = [UIColor blackColor];
    activityView.alpha = 0.5;

    UIImageView *imgView = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default.png"]] autorelease];
    [activityView addSubview:imgView];

    CGRect wheelR = CGRectMake(r.size.width / 2 - 12, r.size.height / 2 - 12, 24, 24);
    UIActivityIndicatorView *activityWheel = [[UIActivityIndicatorView alloc] initWithFrame:wheelR];
    activityWheel.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite;
    activityWheel.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin |
                                    UIViewAutoresizingFlexibleRightMargin |
                                    UIViewAutoresizingFlexibleTopMargin |
                                    UIViewAutoresizingFlexibleBottomMargin);
    [activityWheel startAnimating];
    [activityView addSubview:activityWheel];
}