Photo Bombers Stage 4 Code Challenge problems

I'm having a problem with the triple-tap gesture recognizer code challenge. My code seems fine, but it's saying there's a compiler error (with no other explanation). What am I doing wrong?

Here's my code:

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(like)];
tap.numberOfTapsRequired = 2;
[self addGestureRecognizer:tap];

Edit: Okay, I've tried everything now and it's still not working:

• I actually had set numberOfTapsRequired to 3, but I forgot to write it in here.
• I've used self and self.view in both the first and third line (every combination)
• I've tried using @selector(like), @selector(like:), and nil in line 1.
• I've even tried removing line 3, since it's not really in the instructions as written.

Nothing has worked, and every time I just get "compiler errors" in the code challenge. I'm beginning to think that something on the backend is broken. Is there something stupid that I've missed? I can't see how I'm doing anything wrong...

Edit 2: Turns out the answer was very simple. I was copying from the Xcode files I'd been making as I followed along with the videos, and it turns out that was going beyond what the Code Challenge was asking for. You LITERALLY just need to alloc/init the UITapGestureRecognizer and set numberOfTapsRequired. Nothing else! :)