Question

How can I detect if the user has just downloaded the application and opened it for the first time? IS this a NSUserDefaults? I want to be able to show a welcome screen only the first time my application is run.

Thanks

Answer 1

check for a bool in NSUserDefaults and if it is not set do whatever you want and save a YES-bool back to NSUserDefaults. If you show an alert you probably should put the setBool:forKey: in the delegate method which is called after you have dismissed the alert.

if (![[NSUserDefaults standardUserDefaults] boolForKey:@"wasLaunchedBefore"]) {
    NSLog(@"First launch");
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"wasLaunchedBefore"];
}