1.实例化控制器

self.pageViewController = [[UIPageViewController alloc]initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

self.pageViewController.dataSource = self;

self.pageViewController.delegate = self;

2.设置子控制器

// 勋章

CLHonorCardViewController *cardVC = [[CLHonorCardViewController alloc] init];

// 荣誉

CLHonorViewController *honorVC = [[CLHonorViewController alloc] init];

// 特权

CLHonorPrivilegeViewController *privilegeVC = [[CLHonorPrivilegeViewController alloc] init];

// 每日成绩

CLHonorCoreViewController *coreVC = [[CLHonorCoreViewController alloc] init];

self.subViewController = @[cardVC,honorVC,privilegeVC,coreVC];

[self addChildViewController:self.pageViewController];

[self.view addSubview:self.pageViewController.view];

// 3.设置UIPageViewController的frame

self.pageViewController.view.frame = CGRectMake(0, CGRectGetMaxY(self.selectTab.frame), LYRHomePageScreenW, LYRHomePageScreenH - CGRectGetMaxY(self.selectTab.frame));

[self.pageViewController didMoveToParentViewController:self];

// 4.设置默认的控制器

[self.pageViewController setViewControllers:@[cardVC] direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:NULL];

self.view.gestureRecognizers = self.pageViewController.gestureRecognizers;

5.实现UIPageViewController的代理方法

#pragma mark - UIPageViewControllerDataSource

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController

viewControllerBeforeViewController:(UIViewController *)viewController {

NSUInteger index = [self.subViewController indexOfObject:viewController];

if (index == 0) {  // 注意点如果子控制器为0，则返回空

return nil;

}

return self.subViewController[index - 1];  // 此处index必须减一

}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController

viewControllerAfterViewController:(UIViewController *)viewController {

NSUInteger index = [self.subViewController indexOfObject:viewController];

if (index >= self.subViewController.count - 1) {

return nil;

}

return self.subViewController[index + 1];

}

#pragma mark UIPageViewControllDelegate

- (void)pageViewController:(UIPageViewController *)pageViewController willTransitionToViewControllers:(NSArray<UIViewController *> *)pendingViewControllers

{

UIViewController* controller = [pendingViewControllers firstObject];

self.nextIndex = [self.subViewController indexOfObject:controller];

}

- (void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray<UIViewController *> *)previousViewControllers transitionCompleted:(BOOL)completed

{

if (completed) {

[self.selectTab selectButtonAtIndex:self.nextIndex];

}

}