UIScrollView 内的 UIPanGestureRecognizer

Question

我在 UIScrollView 中使用 UIPanGestureRecognizer 时遇到以下问题：

UIScrollView *sv = [[UIScrollView alloc] initWithFrame:CGRectMake(200, 200, 200, 200)];
sv.contentSize = CGSizeMake(200, 100 *100);
for (int i = 0; i < 100; i++) {
    UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(0, i * 100, 200, 100)];
    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panTile:)];
    [panGesture setDelegate:self];
    [panGesture setEnabled:FALSE];
    [newView addGestureRecognizer:panGesture];

        UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
        [longPressRecognizer setDelegate:self];
        [newView addGestureRecognizer:longPressRecognizer];

        [sv addSubview:newView];
    }

完整的滚动视图充满了小图块，每个图块都实现了平移手势以使它们可拖动。问题是 - 这样做 - 会阻止滚动视图滚动。相反，拖动图块效果很好。当我禁用图块平移手势时，滚动效果很好。平移手势在某种程度上隐藏了滚动视图自己的平移手势。我的想法是从一开始就禁用图块平移手势。一旦用户长按图块，该手势就会启用。问题是用户必须抬起手指，然后再次触摸图块才能拖动它。拖动完成后，我启用长按并再次禁用平移手势。所以 longPress: 看起来如下：

- (void)longPress:(UILongPressGestureRecognizer *) gestureRecognizer {
    for (UIGestureRecognizer *r in gestureRecognizer.view.gestureRecognizers) {
        if ([r isKindOfClass:[UIPanGestureRecognizer class]]) {
            [r setEnabled:TRUE];
        }
    }
    //pan gesture should take over here...
}

是否有可能将长按和平移手势粘合在一起，以便用户不必抬起手指？或者也许是另一种解决方案？