我想在页面视图控制器中获取当前的视图控制器。怎么做。是否有一些代表要打电话或是什么。
答案 0 :(得分:23)
我遇到了同样的问题。在您更改页面后,当前控制器看起来像列表中的最后一个。这对我有用,但我不知道它是否总是如此。
- (void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray *)previousViewControllers transitionCompleted:(BOOL)completed
{
UIViewController *vc = [pageViewController.viewControllers lastObject];
}
答案 1 :(得分:1)
尝试在 pageViewController.viewControllers中获取第一个视图控制器
if let vc = pageViewController.viewControllers?[0] {
... vc is current controller...
}
如果要处理页面更改,请在委托方法中执行此操作:
func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
if let vc = pageViewController.viewControllers?[0] {
... vc is current controller...
}
}
答案 2 :(得分:0)
如果您在任何UIView类(如UIButton,UITable或任何其他子类)中,它是UIViewController.view(或其任何subView.subView.subView ...)的子视图
你可以检查superVew(s)链中是否有UIViewController,并在找到UIViewController时停止
类似的东西:
UIViewController* controllerFound = nil;
for (UIView* next = [self superview]; next; next = next.superview) {
UIResponder* nextResponder = [next nextResponder];
if ([nextResponder isKindOfClass:[UIViewController class]]) {
controllerFound = (UIViewController*)nextResponder;
}
}