objective-c : using basic NSDictionary

snippet.m

//using basic NSDictionary

//inside  DataModel.m
- (void)registerDefaults {
	NSDictionary *dictionary = @{ 
		@"ChecklistIndex" : @-1,
		@"FirstTime" : @YES //“FirstTime” acts as a boolean value because it’s either yes or no (true or false)
	};

	[[NSUserDefaults standardUserDefaults] registerDefaults:dictionary];
}

//call method
- (id)init {
	if ((self = [super init])) { 
		[self registerDefaults];
	}
	return self; 
}