Best way to check if an iPhone app is running for the first time

Question

I want to check if my iPhone app is running for the first time. I can create a file in the documents folder and check that file to see if this is the first time the app is running, but I wanted to know if there is a better way to do this.

Answer 1

I like to use NSUserDefaults to store an indication of the the first run.

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];   if (![defaults objectForKey:@"firstRun"])   [defaults setObject:[NSDate date] forKey:@"firstRun"];  [[NSUserDefaults standardUserDefaults] synchronize]; 

You can then test for it later...

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];         if([defaults objectForKey:@"firstRun"])            {   // do something or not... }