Objective-C trivia

MyController.h

typedef void (^AboutBlock)();

@interface MyController : UIViewController {
    AboutBlock aboutBlock;
}

@end

MyController.m

#import "MyController.h"
@implementation MyController

- (void)viewDidLoad {
    [super viewDidLoad];
    aboutBlock = ^() {
        NSLog(@"%@", [self description]);
    };
    aboutBlock();
}
@end