UIPageViewController在iOS 6中不返回Gesture Recognizers [英] UIPageViewController returns no Gesture Recognizers in iOS 6

问题描述

我正在尝试为UIPageViewController禁用平移手势识别器。

I am trying to disable the pan gesture recognizer for a UIPageViewController.

在iOS 5上，我可以遍历它们并禁用它们。

On iOS 5 I can loop through them and disable them.

for (UIGestureRecognizer* recognizer in self.pageViewController.gestureRecognizers) {
    if ([recognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
        recognizer.enabled = NO;
    }
}

在使用UIPageViewControllerTransitionStyleScroll的iOS 6上，没有返回手势识别器通过页面视图控制器。

On iOS 6 using UIPageViewControllerTransitionStyleScroll there are no gesture recognizers returned by the Page View Controller.

这可以归结为：

当UIPageViewController的过渡样式设置为滚动时，self.pageViewController.gestureRecognizers = 0，因此我无法访问手势识别器。

self.pageViewController.gestureRecognizers = 0 when UIPageViewController's transition style is set to scroll so I can't access the gesture recognizers.

是有什么方法可以解决这个问题吗？由于卷曲过渡工作正常，我认为我没有做错任何事。

Is there any way I can get around this? I don't think I am doing anything wrong since the curl transition works fine.

推荐答案

有一个在雷达中提交的。所以，我敢打赌，直到Apple修复它才有机会解决这个问题。

There is a bug filed in radar for this behavior. So, I bet that until Apple fixes it there will be no chance to solve this.

我想到的一个解决方法是在你的<上面放置一个透明的子视图code> UIPageViewController 并添加一个 UIPanGestureRecognizer 来截取这种手势而不是进一步前进。你可以在需要禁用手势时启用此视图/识别器。

One workaround that comes to my mind is laying a transparent subview on top of your UIPageViewController and add to it a UIPanGestureRecognizer to intercept that kind of gesture and not forward further. You could enable this view/recognizer when disabling the gesture is required.

我尝试使用Pan和Tap手势识别器的组合，它可以工作。

I tried it with a combination of Pan and Tap gesture recognizers and it works.

这是我的测试代码：

- (void)viewDidLoad {
  [super viewDidLoad];

   UIPanGestureRecognizer* g1 = [[[UIPanGestureRecognizer alloc] initWithTarget:self
                                                                      action:@selector(g1Pan:)] autorelease];
  [self.view addGestureRecognizer:g1];

  UITapGestureRecognizer* s1 = [[[UITapGestureRecognizer alloc] initWithTarget:self
                                                                      action:@selector(g1Tap:)] autorelease];

  [self.view addGestureRecognizer:s1];

  UIView* anotherView = [[[UIView alloc]initWithFrame:self.view.bounds] autorelease];
  [self.view addSubview:anotherView];

  UIPanGestureRecognizer* g2 = [[[UIPanGestureRecognizer alloc] initWithTarget:self
                                                                      action:@selector(g2Pan:)] autorelease];
  [anotherView addGestureRecognizer:g2];

}

当 g2 已启用，它将阻止 g1 被识别。另一方面，它不会阻止s1被识别。

When g2 is enabled, it will prevent g1 from being recognized. On the other hand, it will not prevent s1 from being recognized.

我知道这是黑客，但面对中的一个看似错误UIPageViewController （至少，实际行为与参考状态明显不同），我看不出更好的解决方案。

I understand this is hack, but in the face of a seeming bug in UIPageViewController (at least, actual behavior is blatantly different from what the reference states), I cannot see any better solution.

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