NS_PROTOCOL_REQUIRES_EXPLICIT_IMPLEMENTATION does not throw warning

I meant this link (used for google translate) - about NS_PROTOCOL_REQUIRES_EXPLICIT_IMPLEMENTATION

I am trying to get NS_PROTOCOL_REQUIRES_EXPLICIT_IMPLEMENTATION

to throw a warning in my project when a required method in the protocol needs to be implemented and for all subclasses.

Here the protocol is -

NS_PROTOCOL_REQUIRES_EXPLICIT_IMPLEMENTATION
@protocol ExplicitProtocol <NSObject>

@required
- (void)requiredMethod1;
- (void)requiredMethod2;

@optional
- (void)optionalMethod1;
- (void)optionalMethod2;

@end

      

        
        
        
      

    

Base Class Header -

@interface BaseClass : NSObject<ExplicitProtocol>

@end

      

        
        
        
      

    

Base class implementation -

@implementation BaseClass

-(void)requiredMethod1
{

}

-(void)requiredMethod2
{

}

@end

      

        
        
        
      

    

SubClass header

@interface SubClass : BaseClass

@end

      

        
        
        
      

    

SubClass implementation

@implementation SubClass
//No protocol methods implemented here
@end

      

        
        
        
      

    

Since the required methods are not implemented in SubClass

, I want to raise a warning.

Is there a way to achieve this in Objective C? What am I doing wrong here?