Can't find interface declaration for my IOS view controller

Question

I'm getting this error: "Cannot find interface declaration for 'BaseViewController', superclass of 'ViewController'. Here's the situation:

AppDelegate:

• Subclass of NSObject

• In the header file:

  #include UIApplicationDelegate

BaseViewController

• Subclass of UIViewController

• In the header file:

  #import "AppDelegate.h"

ViewController

• Subclass of BaseViewController

  #import "BaseViewController.h"

The error doesn't make sense, as BaseViewController is imported in ViewController's header file. What is the problem here?

Answer 1

Also check for infinite loops in your import statements

Answer 2

Try adding

#import <UIKit/UIKit.h>

Answer 3

Cannot find interface declaration for 'BaseViewController'

That error means that the compiler can't find the line that looks like this:

@interface BaseViewController : UIViewController

But I think it CAN find the BaseViewController.h (Or it would complain about that specifically)

I'd check that the spelling is the same including upper/lowercase?

Other than that, it should work as you'd expect.