objective-c - iOS5 GestureRecognizer は 2 回目のタップでのみ起動します

Question

ios6では1回のタップ後に正常に動作しますが、ios5で2回目のタップ後にのみTapジェスチャ認識エンジンが呼び出される理由は誰にも分かりますか?

コードはios6で機能します。このコードを別のプロジェクトでも試してみましたが、ios5でも機能します。プロジェクト設定にリンクされていると思いますが、どれかわかりません。

私のコードは次のとおりです。

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = questTitle;
    //add coretextview
    scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
    scrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    coreTextView = [[FTCoreTextView alloc] initWithFrame:CGRectMake(20, 20, 280, 0)];
    coreTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    // set text
    [coreTextView setText:[self textForView]];
    // set styles
    [coreTextView addStyles:[self coreTextStyle]];
    // set delegate
    [coreTextView setDelegate:self];

    [coreTextView fitToSuggestedHeight];
    scrollView.scrollEnabled = TRUE;

    [scrollView addSubview:coreTextView];
    [scrollView setContentSize:CGSizeMake(CGRectGetWidth(scrollView.bounds), CGRectGetHeight(coreTextView.frame) + 40)];


     [self.view addSubview:scrollView];

    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
tapGesture.delegate = (id <UIGestureRecognizerDelegate>)self;
[coreTextView addGestureRecognizer:tapGesture];
tapGesture.numberOfTapsRequired = 1;            // How many taps
tapGesture.numberOfTouchesRequired = 1;


coreTextView.userInteractionEnabled = YES;

tapGesture.cancelsTouchesInView = NO;
scrollView.userInteractionEnabled = YES;
scrollView.exclusiveTouch = NO;
scrollView.delegate = self;
[tapGesture release];


}


- (void)pan:(UITapGestureRecognizer*)sender {
     NSLog(@"Pan tap");
}



- (BOOL)gestureRecognizerShouldBegin:(UITapGestureRecognizer *)gestureRecognizer{
      NSLog(@"tap");
    return YES;
}

- (BOOL)gestureRecognizer:(UITapGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UITapGestureRecognizer *)otherGestureRecognizer{
      NSLog(@"tap");
    return YES;
}
- (BOOL)gestureRecognizer:(UITapGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
      NSLog(@"tap");
    return YES;
}