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 r

Answer 1

You can implement it with the static method below. I think it's better since you can call this method as many times as you like, unlike the other solutions. enjoy: (Keep in mind that it's not thread-safe)

+ (BOOL)isFirstTime{
    static BOOL flag=NO;
    static BOOL result;
    if(!flag){
        if ([[NSUserDefaults standardUserDefaults] boolForKey:@"hasLaunchedOnce"])
        {
            result=NO;
        } else
        {
            [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"hasLaunchedOnce"];
            [[NSUserDefaults standardUserDefaults] synchronize];
            result=YES;
        }

    flag=YES;
    }
    return result;
}