iOS：UIPageViewController - 使用按钮跳转到下一页 [英] iOS: UIPageViewController - Use button to jump to next page

问题描述

我在PageViewController中有一系列VC，用户可以用手指从左到右导航。我需要添加按钮，这些按钮基本上执行与手指滑动相同的操作，通过VC向左或向右移动一个按钮。我怎样才能做到这一点？现在我使用这两种方法动态设置VC作为用户滑动：

I have a series of VCs in a PageViewController that a user navigates left to right through with their fingers. I need to add in buttons that essentially perform the same action as the finger swiping, moving left or right by one through the VCs . How can I do this? Right now I am using these two methods to dynamically setting the VCs as the user swipes:

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController          viewControllerBeforeViewController:(UIViewController *)viewController;

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController;

如果用户点击按钮，我可以做同样的事情吗？

Is there someway I can do the same thing if a user clicks a button?

推荐答案

您可以使用 setViewControllers：direction：animated：completion：在您的页面视图控制器上。

You can programmatically set the currently displayed view controller with a transition animation using setViewControllers:direction:animated:completion: on your page view controller.

这是一个显示具有随机背景颜色的视图控制器的示例。您可以调整此选项以使用特定的视图控制器。

Here is an example that presents view controllers with random background colors. You can adjust this to use your specific view controllers.

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.pvc = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];
    self.pvc.view.frame = CGRectInset(self.view.bounds, 200, 200);
    [self.view addSubview:self.pvc.view];

    [self.pvc setViewControllers:@[[self randomVC]] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
}

-(UIViewController*)randomVC
{
    UIViewController *vc = [[UIViewController alloc] init];
    UIColor *color = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1];
    vc.view.backgroundColor = color;
    return vc;
}

- (IBAction)previousButtonPressed:(id)sender {
    [self.pvc setViewControllers:@[[self randomVC]] direction:UIPageViewControllerNavigationDirectionReverse animated:YES completion:nil];
}

- (IBAction)nextButtonPressed:(id)sender {
    [self.pvc setViewControllers:@[[self randomVC]] direction:UIPageViewControllerNavigationDirectionForward animated:YES completion:nil];
}

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