UIPageViewController子视图控制器之间的水平填充

Question

我正在使用UIPageViewController来显示嵌入在子视图控制器中的图像.

NSDictionary *options = [NSDictionary dictionaryWithObject: [NSNumber numberWithInteger:UIPageViewControllerSpineLocationMin] forKey: UIPageViewControllerOptionSpineLocationKey];
self.pageViewController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options: options];
self.pageViewController.dataSource = self;
self.pageViewController.view.frame = self.view.bounds;

ImageViewController *initialViewController = [self viewControllerAtIndex:0];
initialViewController.index = 0;

NSArray *viewControllers = [NSArray arrayWithObject:initialViewController];
[self.pageViewController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

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

一切都很好,但我讨厌儿童视图控制器彼此相邻.

我想知道是否有办法在子视图控制器之间添加填充,这样它们就不会彼此相邻.

看起来更像是这样的东西:

Answer 1

检查UIPageViewController init方法

- (id)initWithTransitionStyle:(UIPageViewControllerTransitionStyle)style navigationOrientation:(UIPageViewControllerNavigationOrientation)navigationOrientation options:(NSDictionary *)opt

您可以在页面间的空间值传递给opt在UIPageViewControllerOptionInterPageSpacingKey

Answer 2

使用Swift,您可以使用initWithTransitionStyle:navigationOrientation:options:初始化程序并UIPageViewControllerOptionInterPageSpacingKey在options参数中传递值以在页面之间设置空格.

作为示例,以下代码显示了如何使用Swift 2.2实现它:

let optionsDict = [UIPageViewControllerOptionInterPageSpacingKey : 20]

let pageViewController = UIPageViewController(transitionStyle: .Scroll,
    navigationOrientation: .Horizontal,
    options: optionsDict)

请注意,UIPageViewController类引用说明UIPageViewControllerOptionInterPageSpacingKey:

该值应该是包含在NSNumber实例中的CGFloat.

但是,[String : Int]如前面的代码所示,类型字典也可以使用.

Answer 3

从故事板中选择UIPageViewController.在Attributes Inspector中,有一个用于设置Page Spacing的选项.