NSUserDefaults - How to tell if a key exists

Question

I\'m working on a small iPhone app, and I am using NSUserDefaults as my data persistence. It only has to keep track of a few things, such as some names and som

Answer 1

Try this little crumpet:

-(void)saveUserSettings{
NSNumber*   value;

value = [NSNumber numberWithFloat:self.sensativity];
[[NSUserDefaults standardUserDefaults] setObject:value forKey:@"sensativity"];
}
-(void)loadUserSettings{
    NSNumber*   value;
    value = [[NSUserDefaults standardUserDefaults] objectForKey:@"sensativity"];
    if(value == nil){
        self.sensativity = 4.0;
    }else{
        self.sensativity = [value floatValue];
    }
}

Treat everything as an object. Seems to work for me.