UIPageViewController禁用滚动 [英] UIPageViewController disable scrolling

问题描述

我正在使用带有transitionStyle UIPageViewControllerTransitionStyleScroll 的UIPageViewController和navigationOrientation UIPageViewControllerNavigationOrientationVertical

I am using a UIPageViewController with transitionStyle UIPageViewControllerTransitionStyleScroll and navigationOrientation UIPageViewControllerNavigationOrientationVertical

我在视图上也有一个 UIPanGestureRecognizer ，我想在平移手势处于活动状态时禁用页面滚动。

I also have a UIPanGestureRecognizer on the view and I want to disable page scrolling when the pan gesture is active.

我想在手势开始时设置以下内容：

I am trying to set the following when the gesture begins:

pageViewController.view.userInteractionEnabled = NO;

这似乎没有效果，或者看起来偶尔有效。

This seems to have no effect, or it appears to work sporadically.

我发现做的唯一另一种方法（工作方式）是在平移手势运行时将UIPageViewController dataSource设置为nil，但这会在重置dataSource时造成很大的延迟。

The only other way I have found to do it (which works) is to set the UIPageViewController dataSource to nil while the pan gesture is running, however this causes a huge delay when resetting the dataSource.

推荐答案

UIPageViewController使用一些UIScrollView对象来处理滚动（至少对于transitionStyle UIPageViewControllerTransitionStyleScroll ）。您可以按控制器的子视图 pageViewController.view.subviews 进行迭代以获取它。现在，您可以轻松启用/禁用滚动：

UIPageViewController uses some UIScrollView object to handle scrolling (at least for transitionStyle UIPageViewControllerTransitionStyleScroll). You can iterate by controller's subviews pageViewController.view.subviews to get it. Now, you can easly enable/disable scrolling:

- (void)setScrollEnabled:(BOOL)enabled forPageViewController:(UIPageViewController*)pageViewController
{
    for (UIView *view in pageViewController.view.subviews) {
        if ([view isKindOfClass:UIScrollView.class]) {
            UIScrollView *scrollView = (UIScrollView *)view;
            [scrollView setScrollEnabled:enabled];
            return;
        }
    }
}

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