如何使用 UIButton 点击​​事件移动下一页和上一页？

Posted 2023-03-13

【中文标题】如何使用 UIButton 点击​​事件移动下一页和上一页？

【英文标题】：How to move next and previous page using UIButton click event?

【发布时间】：2015-10-09 06:14:37

【问题描述】：

我正在使用以下代码来实现UIPageViewController。

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

    NSUInteger index = ((PageContentView*) viewController).pageIndex;

    if ((index == 0) || (index == NSNotFound)) 
        return nil;
    

    index--;
    return [self viewControllerAtIndex:index];


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

    NSUInteger index = ((PageContentView *) viewController).pageIndex;

    if (index == NSNotFound) 
        return nil;
    

    index++;
    if (index == [arrCarStatus count]) 
        return nil;
    
    return [self viewControllerAtIndex:index];

【参考方案1】：

您需要在您的UIButton 点击上调用UIPageViewController 方法。这是您需要做的。为UIPageViewController创建方法

- (void)changePage:(UIPageViewControllerNavigationDirection)direction 
    NSUInteger pageIndex = ((ViewControllerContainingUIImageView *) [_pageViewController.viewControllers objectAtIndex:0]).index;

    if (direction == UIPageViewControllerNavigationDirectionForward)
    
        pageIndex++;
    
    else
    
        pageIndex--;
    

    initialViewController = [self viewControllerAtIndex:pageIndex];

    if (initialViewController == nil) 
        return;
    

    [_pageViewController setViewControllers:@[initialViewController]
                                  direction:direction
                                   animated:YES
                                 completion:nil];

现在在UIButton 上调用此方法，点击提供前进/后退方向

-(void)backSlide

    [self changePage:UIPageViewControllerNavigationDirectionReverse];


-(void)forwardSlide

    [self changePage:UIPageViewControllerNavigationDirectionForward];

【参考方案2】：

- (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];

试试这个它可以帮助你。我制作了全新的演示。

【讨论】：

感谢您的奉献和辛勤工作以获得所需的输出，我很感激。 :)

【参考方案3】：

您可以只使用名为 a 的页面视图控制器的委托方法

- (void)changePage:(UIPageViewControllerNavigationDirection)direction

只需简单检查我在下面提到的条件。

 if (direction == UIPageViewControllerNavigationDirectionForward)
    
        pageIndex++;
    
    else
    
        pageIndex--;