我已经用PageControl 实现了一个不错的UIPageViewControl。滑动指示器时会发生变化并显示正确的当前页面。
但是我注意到，当前页面指示器切换所需的只是开始滑动。这意味着如果我开始滑动但随后松开手指，则当前页面指示器已切换，就像页面已切换一样，但事实并非如此。这是我用来进行切换的代码:
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated{
NSUInteger index = [self.navigationController.viewControllers indexOfObject:viewController];
self.pageControl.currentPage = index;
}
我注意到的另一件事是，当我快速向右和向左滑动更改 View 时，页面指示器只是卡住并且不会移动。
因此它仅在您不快速更改 View 时才有效。如果您需要任何其他代码，请告诉我。谢谢。
编辑
这是我用来实现 UIPageViewController 的代码。
- (void)viewDidLoad
{
[super viewDidLoad];
// Create the data model
self.navigationItem.title = @"Tabell";
self.identifiers = [[NSMutableArray alloc] init];
[self.identifiers addObject:@"rankTable"];
[self.identifiers addObject:@"page2"];
// Create page view controller
self.pageViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"PageViewController"];
self.pageViewController.dataSource = self;
self.pageViewController.delegate = self;
self.navigationController.delegate = self;
CGSize navBarSize = self.navigationController.navigationBar.bounds.size;
CGPoint origin = CGPointMake( navBarSize.width/2, navBarSize.height/2 );
self.pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(origin.x, origin.y+16,
0, 0)]; //Here added 45 to Y and it did the trick
self.pageControl.pageIndicatorTintColor = navbarColor;
self.pageControl.currentPageIndicatorTintColor = [UIColor lightGrayColor];
[self.pageControl setNumberOfPages:2];
[self.navigationController.navigationBar addSubview:self.pageControl];
UITableViewController *startingViewController = [self viewControllerAtIndex:0];
NSArray *viewControllers = @[startingViewController];
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];
CGFloat tabBarHeight = self.tabBarController.tabBar.frame.size.height;
// Change the size of page view controller
self.pageViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - tabBarHeight);
[self addChildViewController:_pageViewController];
[self.view addSubview:_pageViewController.view];
[self.pageViewController didMoveToParentViewController:self];
}
最佳答案
你为什么不实现UIPageViewControllerDelegate的
- pageViewController: didFinishAnimating: previousViewControllers: transitionCompleted: 方法？它有一个 transitionCompleted bool 值，告诉您是否应该更新您的页面控件。您当前的实现似乎有问题，因为一旦您开始滑动页面，它就会加载下一页的 View Controller 并调用 ...didShow... 方法。希望这会有所帮助。
关于ios - UIPageControl 当前页面指示器在呈现新 View 之前切换，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30324011/