使用Swift从底部向上推视图控制器

Question

我想使用Swift推动一个视图控制器并为其设置动画,使其从底部显示并向上移动.我有以下代码来推动我的视图控制器:

let helloTableViewController = self.storyboard!.instantiateViewControllerWithIdentifier("helloTableViewController") as! HelloTableViewController
self.navigationController!.pushViewController(helloTableViewController, animated: true)

我从另一个问题中找到了以下内容,但似乎无法在Swift中使用它:

CATransition *animation = [CATransition animation]; 
[animation setDuration:2]; 
[animation setType:kCATransitionPush]; 
[animation setSubtype:kCATransitionFromTop]; 
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]]; 
SecondView *sObj=[[SecondView alloc] initWithNibName:@"SecondView" bundle:nil];
[self.navigationController pushViewController:sObj animated:YES];
[[sObj.view layer] addAnimation:animation forKey:@"SwitchToView1"];

Answer 1

Swift3:

推送:

    // push view controller but animate modally
    let storyBoard: UIStoryboard = UIStoryboard(name: "myStoryBoard", bundle: nil)
    let vc = storyBoard.instantiateViewController(withIdentifier: "myViewControllerIdentifier") as! MyViewController

    let navigationController = self.navigationController


    vc.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Close", style: .plain, target: vc, action: #selector(vc.closeView))
    vc.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: vc, action: nil)

    let transition = CATransition()
    transition.duration = 0.5
    transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    transition.type = kCATransitionMoveIn
    transition.subtype = kCATransitionFromTop
    navigationController?.view.layer.add(transition, forKey: nil)
    navigationController?.pushViewController(vc, animated: false)

并在vc中为pop:

func closeView() {
    let transition = CATransition()
    transition.duration = 0.5
    transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    transition.type = kCATransitionReveal
    transition.subtype = kCATransitionFromBottom
    navigationController?.view.layer.add(transition, forKey: nil)
    _ = navigationController?.popViewController(animated: false)
}

Answer 2

这是推送的代码

  let transition:CATransition = CATransition()
    transition.duration = 0.5
    transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    transition.type = kCATransitionPush
    transition.subtype = kCATransitionFromBottom
    self.navigationController!.view.layer.add(transition, forKey: kCATransition)
    self.navigationController?.pushViewController(dstVC, animated: false)

和您可以使用的过渡类型

 kCATransitionFromLeft
 kCATransitionFromBottom
 kCATransitionFromRight
 kCATransitionFromTop

Answer 3

使用 Swift 5 和 Xcode 11.4 更新

当前动画风格的控制器推送

    let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let viewController = storyBoard.instantiateViewController(withIdentifier: "ViewController") as! ViewController

    let transition = CATransition()
    transition.duration = 0.5
    transition.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    transition.type = CATransitionType.moveIn
    transition.subtype = CATransitionSubtype.fromTop
    self.navigationController?.view.layer.add(transition, forKey: nil)
    self.navigationController?.pushViewController(viewController, animated: false)

Dismiss 风格的 PopToView 控制器

            let transition:CATransition = CATransition()
        transition.duration = 0.5
        transition.timingFunction = CAMediaTimingFunction(name:CAMediaTimingFunctionName.easeInEaseOut)
        transition.type = CATransitionType.reveal
        transition.subtype = CATransitionSubtype.fromBottom
        self.navigationController?.view.layer.add(transition, forKey: kCATransition)
        self.navigationController?.popViewController(animated: false)

Answer 4

我遇到了类似的情况，我需要在视图控制器上显示带有一些 UIBarButtonItems 的导航项，但以模态方式呈现时，它没有显示。它仅在从导航控制器推送时显示，但我确实需要从下到上的动画。我尝试了上面的 CATransition 示例，但它带来了另一个错误，在动画过程中出现黑色阴影/半透明背景。我最终想出了一个非常简单的解决方案：

let someVC = storyboard?.instantiateViewController(withIdentifier: "SomeVC") as! SomeVC
let navController = UINavigationController(rootViewController: someVC)
navigationController?.present(navController, animated: true, completion: nil)

要关闭视图控制器并完全摆脱导航控制器，您只需调用：

self.dismiss(animated: true, completion: nil)

这将关闭视图控制器，并从内存中释放我们的导航控制器。

最终这是一个简单的解决方案，但我花了一些时间才想出它。也许我会节省别人的时间:)

Answer 5

Swift 5.0 及更高版本

  let transition:CATransition = CATransition()
  transition.duration = 0.5
  transition.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
  transition.type = CATransitionType.push
  transition.subtype = CATransitionSubtype.fromTop
  self.navigationController!.view.layer.add(transition, forKey: kCATransition)