NSLog / print out what UI element you tap. For finding what code / method / function belongs to what element. From Aryan Ghassemi in ios-dev slack

Log UI Elements

- (void)viewDidLoad {
   [super viewDidLoad];
   [self addGesture:self.view];
}

- (void)addGesture:(UIView *)aView {
    UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(didDetectClick:)];
    [aView addGestureRecognizer:gesture];
    
    for (UIView *subView in aView.subviews) {
        [self addGesture:subView];
    }
}

- (void)didDetectClick:(UITapGestureRecognizer *)tap {
    NSLog(@"%@", tap.view);
}