Question

All I want is an integer which everytime my app opens is incremented by one. Is there an easy way to do this? Please help.

Thanks, in advance.

Answer 1

You will want to do something like this:

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSInteger counter = [defaults integerForKey:@"counterKey"];
counter++;
[defaults setInteger:counter forKey:@"counterKey"];

This also works if the key has never been registered. integerForKey will just return 0, which is actually what we want. However, if you want to be extra-secure, you can check it beforehand. after the second line by something like this:

NSInteger counter = 0;
if ([defaults objectForKey:@"counterKey"] != nil)
    counter = [defaults integerForKey:@"counterKey"];