ios - 数据源更改后动态重新加载 UIPageViewController

Question

所以我正在尝试创建一个类似 ibooks 的阅读器，我需要在从 web 服务获取数据后动态更新 UIPageViewController 的内容。由于一系列原因，我必须在开始时实例化它，然后在数据到来时更新它。

我是这样创建的:

NSDictionary *options =
[NSDictionary dictionaryWithObject:
 [NSNumber numberWithInteger:UIPageViewControllerSpineLocationMin]
                            forKey: UIPageViewControllerOptionSpineLocationKey];

self.pageController = [[UIPageViewController alloc]
                       initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl
                       navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal
                       options: options];

self.pageController.dataSource = self;
self.pageController.delegate = self;

[[self.pageController view] setFrame:[[self view] bounds]];

MovellaContentViewController *initialViewController = [self viewControllerAtIndex:0];

self.controllers = [NSArray arrayWithObject:initialViewController];

[self.pageController setViewControllers:self.controllers
                              direction:UIPageViewControllerNavigationDirectionForward
                               animated:NO
                             completion:nil];

[self addChildViewController:self.pageController];
[[self view] addSubview:[self.pageController view]];
[self.pageController didMoveToParentViewController:self];

然后我设置 self.controllers = newControllersArray;

我正在为 UITableViewController 寻找类似 reloadData 的东西，UIPageViewController 有这样的东西吗？

Answer 1

你必须再次发送 setViewControllers:direction:animated:completion: 到 pageController并给它第一个显示的 View Controller :

[self.pageController setViewControllers:[NSArray arrayWithObject:
                                            [self viewControllerAtIndex:0]
                                        ]
                              direction:UIPageViewControllerNavigationDirectionForward
                               animated:NO
                             completion:nil];

如果 viewControllerAtIndex: 没有像我最初假设的那样访问 self.controllers，它可能应该是

[self.pageController setViewControllers:[NSArray arrayWithObject:
                                            [self.controllers objectAtIndex:0]
                                        ]
                              direction:UIPageViewControllerNavigationDirectionForward
                               animated:NO
                             completion:nil];

代替