应该实现UIScrollViewDelegate方法来限制边缘滚动

class MyPageViewController: UIPageViewController {

    override func loadView() {
        super.loadView()
    
        view.subviews.forEach { sv in
            if let scrollView = sv as? UIScrollView {
                scrollView.delegate = self
            }
        }
    }
}

extension MyPageViewController: UIScrollViewDelegate {

    func scrollViewDidScroll(_ scrollView: UIScrollView) {
            
        if currentPage == 0, scrollView.contentOffset.x + scrollView.contentInset.left < 0 {
            scrollView.contentOffset = CGPoint(x: -scrollView.contentInset.left, y: scrollView.contentOffset.y)
        }
        else if currentPage == pageCount - 1, scrollView.contentInset.right < 0, scrollView.contentOffset.x + scrollView.contentInset.right > 0 {
            scrollView.contentOffset = CGPoint(x: -scrollView.contentInset.right, y: scrollView.contentOffset.y)
        }
    }

    func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {

        if currentPage == 0, scrollView.contentOffset.x + scrollView.contentInset.left < 0 {
            targetContentOffset.pointee = CGPoint(x: -scrollView.contentInset.left, y: targetContentOffset.pointee.y)
        }
        else if currentPage == pageCount - 1, scrollView.contentInset.right < 0, scrollView.contentOffset.x + scrollView.contentInset.right > 0 {
            targetContentOffset.pointee = CGPoint(x: -scrollView.contentInset.right, y: targetContentOffset.pointee.y)
        }
    }
}

这里的currentPage是当前页面索引，pageCount是总页数。

要在UIPageViewController上禁用反弹，您可以这样做（在Swift 5中），假设您将myPages var声明为UIViewController数组：

// 添加滚动委托

class myController: UIPageViewController, UIScrollViewDelegate { ... }

// 声明 currentIdx 和 scrollview 变量

private var currentIdx: Int = 0
private var scrollview: UIScrollView?

// 在 ViewDidLoad 中，添加委托和股票滚动视图

for view in view.subviews {
   if let subView = view as? UIScrollView {
      subView.delegate = self
      scrollview = subView 
   }
}

// 在你的代码中可以像这样检索当前索引

guard let currentViewController = viewControllers?.first, let currentIndex = myPages.firstIndex(of: currentViewController) else {
   return
}

currentIdx = index

// 声明私有函数来计算需要的反弹次数

private func setBounces() {
    let max = myPages.count - 1
    scrollview?.bounces = currentIdx > 0 && currentIdx < max
}

// 添加UIScrollViewDelegate方法

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
    setBounces()
}

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    setBounces()
}

UIPageViewController实际上对你来说并没有太多用处。你可以很容易地使用带有视图控制器的UIScrollView，并禁用其弹跳效果。

只需像这样做

int x=0;
for (NSString *storyboardID in storyboardIDs){
        UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:storyboardID];
        [self addChildViewController:vc];
        vc.view.frame = CGRectMake(x++*vc.view.frame.size.width, 0, vc.view.frame.size.width, vc.view.frame.size.height);
        [self.scrollView addSubview:vc.view];
        [vc didMoveToParentViewController:self];
        self.scrollView.contentSize = CGSizeMake(storyboardIDs.count*vc.view.frame.size.width, vc.view.frame.size.height);
}

如果你尝试禁用UIPageViewController.scrollView的弹跳效果，你肯定会导致pageViewController出现问题：滑动操作将无法正常工作。所以，请不要这样做。

self.theScrollView.alwaysBounceHorizontal = NO;
self.theScrollView.bounces = NO;

使用在UIPageViewController子视图中搜索scrollView引用的解决方案，以完全禁用滚动：

@interface MyPageViewController : UIPageViewController
@property (nonatomic, assign) BOOL scrollEnabled;
@end

@interface MyPageViewController ()
@property (nonatomic, weak) UIScrollView *theScrollView;
@end

@implementation MyPageViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    for (UIView *view in self.view.subviews) {
        if ([view isKindOfClass:UIScrollView.class]) {
            self.theScrollView = (UIScrollView *)view;
            break;
        }
    }
}

- (void)setScrollEnabled:(BOOL)scrollEnabled
{
    _scrollEnabled = scrollEnabled;
    self.theScrollView.scrollEnabled = scrollEnabled;
}

@end

禁用UIPageViewController中的弹跳解决方案：

1. 创建UIScrollView类别（例如CustomScrolling）。 UIScrollView已经是其手势识别器的委托。
2. 请注意，您的目标UIViewController（即内部带有UIPageViewController的baseVC）通过AppDelegate共享。否则，您可以使用运行时（#import <objc/runtime.h>）并将引用属性（到您的控制器baseVC）添加到类别中。

3. 实现类别：

   @interface UIScrollView (CustomScrolling) <UIGestureRecognizerDelegate>
   @end
   
   @implementation UIScrollView (CustomScrolling)
   
   - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
   {
       UIViewController * baseVC = [(AppDelegate *)[[UIApplication sharedApplication] delegate] baseVC];
       if (gestureRecognizer.view == baseVC.pageViewController.theScrollView) {
           NSInteger page = [baseVC selectedIndex];
           NSInteger total = [baseVC viewControllers].count;
           UIPanGestureRecognizer *recognizer = (UIPanGestureRecognizer *)gestureRecognizer;
           CGPoint velocity = [recognizer velocityInView:self];
           BOOL horizontalSwipe = fabs(velocity.x) > fabs(velocity.y);
           if (!horizontalSwipe) {
               return YES;
           }
           BOOL scrollingFromLeftToRight = velocity.x > 0;
           if ((scrollingFromLeftToRight && page > 0) || (!scrollingFromLeftToRight && page < (total - 1))) {
               return YES;
           }
           return NO;
       }
       return YES;
   }
   
   @end
   

4. 在使用UIPageViewController的baseVC中导入类别文件#import "UIScrollView+CustomScrolling.h"。

编辑：不要使用此解决方案。仅供参考和教育目的后来我发现这会引入一个 bug，大约有 5% 的情况下，用户不能以同一方向翻页。他们必须返回到上一页，然后再次前进才能继续。

如果您正在使用 UIPageViewControllerDataSource，一个相对简单的解决方法（有点 hacky）是在每次调用 pageViewController:viewControllerBeforeViewController: 代理方法时禁用弹跳。以下是一个示例实现：

@interface YourDataSourceObject ()
@property (strong, nonatomic) UIScrollView *scrollView;
@end

@implementation
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController {
    if (!self.scrollView) {
        for (UIView *view in pageViewController.view.subviews) {
            if ([view isKindOfClass:[UIScrollView class]]) {
                self.scrollView = (UIScrollView *)view;
            }
        }
    }
    self.scrollView.bounces = NO;

    // Your other logic to return the correct view controller. 
}
@end

可行的解决方案 - Swift 5

从UIPageViewController的子视图中找到UIScrollView实例，

然后将bounces属性设置为false，就可以轻松解决问题。

let vc = UIPageViewController(transitionStyle: UIPageViewController.TransitionStyle.scroll, navigationOrientation: UIPageViewController.NavigationOrientation.horizontal, options: [:])
for subview in vc.view.subviews {
  if let scrollView = subview as? UIScrollView {
    scrollView.bounces = false
    break
  }
}
        

这对我来说在viewDidLoad中起了作用：

for subview in pager.view.subviews {
    if let scrollView = subview as? UIScrollView {
        scrollView.bounces = false
        scrollView.alwaysBounceHorizontal = false
        break
    }
}