如何自定义Modal View Controller演示动画？

Question

我不想设置uiviewcontroller的modalTransitionStyle，而是想添加一个CAAnimation(或其他一些东西)。此代码可以在navigationController中执行自定义动画

CATransition* transition = [CATransition animation];
          transition.duration = 0.4;
          transition.type = kCATransitionFade;
          transition.subtype = kCATransitionFromBottom;
          [self.navigationController.view.layer addAnimation:transition forKey:kCATransition];
          [self.navigationController pushViewController:adjustViewController animated:NO];

如何将其实现为Modal View Controller？

Answer 1

您只需将过渡添加到窗口的层，并呈现您的控制器，而不是推送它：

     CATransition* transition = [CATransition animation];
     transition.duration = 1;
     transition.type = kCATransitionFade;
     transition.subtype = kCATransitionFromBottom;
     [self.view.window.layer addAnimation:transition forKey:kCATransition];
     [self presentViewController:adjustViewController animated:NO completion:nil];

Answer 2

Swift版本

let viewController = YourViewController()
let transition = CATransition()
transition.duration = 0.5
transition.type = kCATransitionFade
transition.subtype = kCATransitionFromBottom
view.window!.layer.add(transition, forKey: kCATransition)
present(viewController, animated: false, completion: nil)

Answer 3

来自苹果开发指南：

Presenting a View Controller Using Custom Animations

要使用自定义动画呈现视图控制器，请在现有视图控制器的操作方法中执行以下操作：

• 创建您想要转换自定义转换委托对象的视图控制器，并将其分配给视图控制器的transitioningDelegate属性。转换代理的方法应在请求时创建并返回自定义动画器对象。
• 调用presentViewController:animated:completion:方法来呈现视图控制器。

..。