Question

Im wanting to show an alert when the user has been using the app for an hour

In the app delegate:

First I tried this: Displaying UIAlertView after some time

Then I tried

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[self performSelector:@selector(showAlert) withObject:nil afterDelay:3600];

return YES;
}

-(void)showAlert{
  UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"title!"
                                                 message:@"message!"
                                                delegate:self
                                       cancelButtonTitle:@"Cancel"
                                       otherButtonTitles:nil];
  [alert show];
}

In both examples I tried using various figures in the after delay. No matter what I put for the delay, the timer fires after a min every time?

UPDATE:
This is correct code, I had also left this in the viewDidLoad in my view controller in addition to delegate so it was also firing that method. Thanks all

Answer 1

If this is what you do:

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

    [self performSelector:@selector(showAlert) withObject:nil afterDelay:3600];

    return YES;
}

-(void)showAlert{
    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"title!"
                                                     message:@"message!"
                                                    delegate:self
                                           cancelButtonTitle:@"Cancel"
                                           otherButtonTitles:nil];
    [alert show];
}

you should edit your question to this, and add additional information, as the problem has to be somewhere else.

Otherwise, this is your answer.