Objective-c delegate

Delegate.h

@protocol MyControlDelegate <NSObject>

@optional
- (void)delegateAction:(id)value;

@end

@interface MyControl : NSObject{
    id<MyControlDelegate> delegate;
}

@property (nonatomic, assign) id<MyControlDelegate> delegate;

- (id)initWithDelegate:(id<MyControlDelegate>)aDelegate;
+ (id)objectWithDelegate:(id<MyControlDelegate>)aDelegate;

@end

Delegate.m

@implementation MyControl

@synthesize delegate;

- (id)initWithDelegate:(id<MyControlDelegate>)aDelegate{
    if((self = [super init])){
        self.delegate = aDelegate;
    }
    return self;
}

+ (id)objectWithDelegate:(id<MyControlDelegate>)aDelegate{
	return [[[[self class] alloc] initWithDelegate:aDelegate] autorelease];
}

- (void)action{
    if(self.delegate && [self.delegate respondsToSelector:@selector(delegateAction:)]){
        [self.delegate delegateAction];
    }
}

- (void)dealloc{
    delegate = nil;
    [super dealloc];
}

@end