问题描述
当我接近UiPageVC时,在调用UiPageVC的viewWilldisappear之后,将调用ChildVC的viewWillAppear和viewDidAppear函数。最后,UiPageVC的viewDiddisappear起作用。
我需要像正常方式一样使用ChildVC。当我解雇UiPageVC时,应该调用ChildVC的viewWilldisappear和viewDiddisappear。
解决方法
根据this answer,viewWillDisappear(_:)
和viewDidDisappear(_:)
可能不会在子视图控制器中被调用。
在Apple's Doc之后,在viewWillDisappear(_:)
子类中覆盖viewDidDisappear(_:)
和UIPageViewController
。
override func viewWillDisappear(_ animated: Bool) {
super.viewWillAppear(animated)
children.forEach { $0.beginAppearanceTransition(false,animated: true) }
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
children.forEach { $0.endAppearanceTransition() }
}