[ObjC][CALayer]タップされたCALayerをself.view.layer.sublayersから検知する

gistfile1.m

// self.view.layerに 画像レイヤを追加するメソッド
- (void)addMetorite:(NSTimer*)timer
{
    CALayer *layer = [CALayer layer];
    [layer setContents:(__bridge id)[UIImage imageNamed:@"american-flag.png"].CGImage];
    [layer setContentsScale:[UIScreen mainScreen].scale];
    [layer setBounds:CGRectMake(0, 0, 50, 50)];
    CGRect viewBounds = CGRectInset(self.view.frame, 50, 50);
    
    [layer setPosition:CGPointMake(arc4random_uniform(viewBounds.size.width), arc4random_uniform(viewBounds.size.height))];
    [self.view.layer addSublayer:layer];
    [layer startWithScaleDuration:arc4random_uniform(10)+2];
    
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTapped:)];
    [self.view setGestureRecognizers:@[tap]]; 
}

// タップジェスチャのハンドラ
- (void)handleTapped:(UIGestureRecognizer*)gesture
{
    CALayer *tappedLayer;
    CGPoint touchPoint = [gesture locationInView:self.view];
    NSLog(@"%@",NSStringFromCGPoint(touchPoint));
    
    for (CALayer *layer in self.view.layer.sublayers) {
        tappedLayer = [layer hitTest:touchPoint];
        if (tappedLayer != nil) {
            //タップされたレイヤを発見
        }
    }
}