如何更改 UIPageViewControllerOptionInterPageSpacingKey 的值？

Question

我正在尝试在ViewDidAppear() 中设置值UIPageViewControllerOptionInterPageSpacingKey

但是我的 UIPageViewController 的初始化代码在ViewDidLoad()

如果我在视图设置它的布局之前设置UIPageViewControllerOptionInterPageSpacingKey，则自动布局会出现问题

Answer 1

您必须在初始化时更改页面间距。这可以在 XIB/Storyboard 中完成，或者通过 initWithTransitionStyle:navigationOrientation:options: 方法传递 @{UIPageViewControllerOptionInterPageSpacingKey : @(5.f)}。这在UIPageViewController.h 文件from Apple 中提到：

// Key for specifying spacing between pages in options dictionary argument to initWithTransitionStyle:navigationOrientation:options:.
// Value should be a CGFloat wrapped in an NSNumber. Default is '0'.
// Only valid for use with page view controllers with transition style 'UIPageViewControllerTransitionStyleScroll'.
UIKIT_EXTERN NSString * const UIPageViewControllerOptionInterPageSpacingKey NS_AVAILABLE_IOS(6_0);