Accessing a property from another class

Question

Im trying to build an app where the user inputs a number at a textfield and after pressing the button another view shows up with the result of that input.

Each number th

Answer 1

As far as I understand your question, if you need a method returning the string title depending on the number provided you can make your method as a class method of your LibraryData class, not instance method, like:

+ (NSString *)titleStringFromInt: (NSInteger) intVal {
    if (intVal < 5000) 
        return @"Poor!";
    else
    return @"Rich!";
}

And call it from your controller like, [LibraryData titleStringFromInt: [[ViewController.fieldLabel text] intValue]];

If you need to actually store data into your LibraryData class being accessible from all other controllers in your app, I would suggest taking into singleton pattern implementation.

For example using blocks:

+ (LibraryData *)instance
{
   static dispatch_once_t onceToken = 0;

   __strong static id _sharedObject = nil;

   dispatch_once(&onceToken, ^{
       _sharedObject = [[self alloc] init];
   });

   return _sharedObject;
}

And call it, like [LibraryData instance].number from your ViewController code. Anyway I think it's a good to move your if/else code out of getter method of your variable to some helper class method.