Question

I believe I have the code for determining if my application has been opened before set in stone:

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
BOOL didFirstLaunch = [defaults boolForKey:@"DidFirstLaunch"];
if (!didFirstLaunch) {
    [defaults setBool: YES forKey:@"DidFirstLaunch"];

    //Code for assembling overlay view
}

I put this code in the didFinishLaunchingWithOptions method.

I want the transparent overlay view to only cover 3/4 of the iPhone screen and be slightly transparent so you can still see a little of the main page of my application — it will have a couple pictures and text on it (basically a simple tutorial). How do I go about creating a simple view of this nature?

Answer 1

You should put your code in didFinishLaunchingWithOptions method:

BOOL didFirstLaunch = [[NSUserDefaults standardUserDefaults] boolForKey:@"DidFirstLaunch"];

if (!didFirstLaunch) {

    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"DidFirstLaunch"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, window.frame.size.width, window.frame.size.height)];
    //add some stuff to your transparent view. Example background color
    [v setBackgroundColor:[UIColor orangeColor]];

    // Finally set the alpha value
    [v setAlpha:0.3];
    [window addSubview:v];

}

Hope it helps. 😉