UITapGestureRecognizerでダブルタップ時にシングルタップアクションをさせない

  UITapGestureRecognizer *doubleTapGestureRecognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)] autorelease];
  doubleTapGestureRecognizer.numberOfTapsRequired = 2;
  [self.view addGestureRecognizer:doubleTapGestureRecognizer];

  UITapGestureRecognizer *singleTapGestureRecognizer = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)] autorelease];
  singleTapGestureRecognizer.numberOfTapsRequired = 1;
  // ダブルタップに失敗した時だけシングルタップとする
  [singleTapGestureRecognizer requireGestureRecognizerToFail:doubleTapGestureRecognizer];
  [self.view addGestureRecognizer:singleTapGestureRecognizer];