I have created a custom class of NSObject, and I would like to access some instance variables from my main View Controller to that custom class, how do you do that?
EDIT: Perhaps I was unclear in my first formulation. It is the instance variables from the ViewController class I would like to access, not the ivars from my custom class.
If I got you right, the simplest way is to pass view controller instance during initialization. Just implement initWithViewController:(UIViewController*)vc in your custom class.
You should expose your data as properties in your NSObject subclass. You can find a description of properties at this tutorial: http://rypress.com/tutorials/objective-c/properties.html.
You should better use properties to easy access to some info in your custom class. They automatically generate iVars.
Also you can access public (declared in .h file) ivars directly:
@interface CustomClass : NSObject
{
NSArray *_array1;
}
@property (nonatomic, strong) NSArray *array2;
CustomClass *instance = [CustomClass new];
NSArray *a1 = instance->_array1;
NSArray *a2 = instance.array2;
