Question

I built an application using Xcode 4.5 with storyboards. The first time the app launches I want the initial view controller to appear with terms and conditions that must be accepted to proceed. After that, I want the app to launch and skip over the first view controller and go to the second one.

I know I have to use the NSUserDefaults class and something to the effect of:
if ([[NSUserDefaults standard…] boolForKey:@”iHaveAcceptedTheTerms”])

But I have never used this class before and have no idea how to implement this code. Can someone share the specifics of how to do this?

Answer 1

You put in in your AppDelegate:

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

//first-time ever defaults check and set
if([[NSUserDefaults standardUserDefaults] boolForKey:@"TermsAccepted"]!=YES)
{
    [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"TermsAccepted"];
}

Then you implement in your rootViewController the terms and conditions and a way to accept it.
You will have to check if the terms are accepted, for example like this:

if ([[NSUserDefaults standardUserDefaults] boolForKey:@"TermsAccepted"]){
    //proceed with app normally
}
else{
//show terms
}

When accepted, the following code will change the default settings:

 if(termsaccepted){
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"TermsAccepted"];
}