a.m

#import "ViewController.h"

@interface ViewController ()

@end

@interface asdf : NSObject

@end

@implementation asdf

- (NSMethodSignature *)methodSignatureForSelector:(SEL)aSelector
{
    return [super methodSignatureForSelector:aSelector];
}

- (void)forwardInvocation:(NSInvocation *)anInvocation
{
    NSLog(@"yo");
    [super forwardInvocation:anInvocation];
}

- (void)go
{
    NSLog(@"bro");
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [[[asdf alloc] init] go];
    // Do any additional setup after loading the view, typically from a nib.
}


@end