我有一个情节提要设置，在某个时刻，一个按钮会用另一个按钮替换"详细信息视图"。默认情况下，根本没有转换：视图控制器会突然被替换。我可以创建一个吗？如何创建？
我的猜测是使用自定义转换——就像通常为视图更改使用自定义动画一样——但我不知道如何实现拆分视图控制器的"替换"行为。
我使用自定义segue完成了这项工作，当有splitViewController时，我会"显示细节"，否则我会尝试推送/呈现模态。所有动画。显示模式动画将使用变换淡出旧控制器，并使用变换更改显示新控制器
class ShowDetailSegue: UIStoryboardSegue {
private let showFromScale : CGFloat = 0.8
private let hideToScale : CGFloat = 1.2
private let animationDuration : NSTimeInterval = 0.33
override func perform() {
let sourceVC = self.sourceViewController as! UIViewController
let destinationVC = self.destinationViewController as! UIViewController
let animated = true
if let splitVC = sourceVC.splitViewController where splitVC.isInSplitView {
// splitview with detail is visible, we will show detail with animation
showDetail(splitVC, sourceVC : sourceVC, destinationVC: destinationVC, animated: animated)
} else if let navController = sourceVC.navigationController {
// there is no split view – just push to navigation controller
sourceVC.navigationController?.pushViewController(destinationVC, animated: animated)
} else {
// no navigation found, let just present modal
sourceVC.presentViewController(destinationVC, animated: animated, completion: nil)
}
}
private func showDetail(splitVC : UISplitViewController, sourceVC : UIViewController, destinationVC : UIViewController, animated : Bool) {
let newDetailVC = GeneralNavigationController(rootViewController: destinationVC)
newDetailVC.applyAppearance()
if !animated {
splitVC.showDetailViewController(newDetailVC, sender: sourceVC)
} else {
var currentDetailVC = splitVC.viewControllers.last as! UIViewController
if let currentDetailNC = currentDetailVC as? UINavigationController {
currentDetailVC = currentDetailNC.topViewController
}
UIView.animateWithDuration(animationDuration / 2.0, animations: { () -> Void in
// hide the old view with transform
currentDetailVC.view.alpha = 0
currentDetailVC.view.transform = CGAffineTransformMakeScale(self.hideToScale, self.hideToScale)
currentDetailVC.navigationController?.navigationBar.alpha = 0
}, completion: { (completed) -> Void in
newDetailVC.navigationController?.navigationBar.alpha = 0
newDetailVC.view.alpha = 0
newDetailVC.view.transform = CGAffineTransformScale(newDetailVC.view.transform, self.showFromScale, self.showFromScale)
splitVC.showDetailViewController(newDetailVC, sender: sourceVC)
// Show new view
UIView.animateWithDuration(self.animationDuration / 2.0, animations: { () -> Void in
newDetailVC.view.alpha = 1
newDetailVC.view.transform = CGAffineTransformScale(newDetailVC.view.transform, 1 / self.showFromScale, 1 / self.showFromScale)
newDetailVC.navigationController?.navigationBar.alpha = 1
}, completion: { (completed) -> Void in
currentDetailVC.view.transform = CGAffineTransformScale(currentDetailVC.view.transform, 1 / self.hideToScale, 1 / self.hideToScale)
})
})
}
}
}
我使用了Pavel Smejkal的答案，并添加了以下修饰：
- 新的细节控制器可能已经嵌入UINavigationController，所以我检查一下
- 我去掉了他的风俗导航控制器类
- 我把它转换成Swift 3
这是修改后的代码：
import UIKit
class SegueShowDetail: UIStoryboardSegue {
private let showFromScale: CGFloat = 0.8
private let hideToScale: CGFloat = 1.2
private let animationDuration: TimeInterval = 0.33
override func perform() {
let sourceVC = self.source
let destinationVC = self.destination
let animated = true
if let splitVC = sourceVC.splitViewController, !splitVC.isCollapsed {
// splitview with detail is visible, we will show detail with animation
showDetail( splitVC: splitVC, sourceVC : sourceVC, destinationVC: destinationVC, animated: animated )
} else if let navController = sourceVC.navigationController {
// there is no split view – just push to navigation controller
sourceVC.navigationController?.pushViewController( destinationVC, animated: animated )
} else {
// no navigation found, let just present modal
sourceVC.present( destinationVC, animated: animated, completion: nil )
}
}
fileprivate func showDetail( splitVC : UISplitViewController, sourceVC : UIViewController, destinationVC : UIViewController, animated : Bool ) {
var navController: UINavigationController? = destinationVC as? UINavigationController
if nil == navController {
navController = UINavigationController( rootViewController: destinationVC )
}
guard let newDetailNavVC = navController else {
return
}
if !animated {
splitVC.showDetailViewController( newDetailNavVC, sender: sourceVC )
} else {
var currentDetailVC = splitVC.viewControllers.last!
if let currentDetailNC = currentDetailVC as? UINavigationController {
currentDetailVC = currentDetailNC.topViewController!
}
UIView.animate(withDuration: animationDuration / 2.0, animations: { () -> Void in
// hide the old view with transform
currentDetailVC.view.alpha = 0
currentDetailVC.view.transform = CGAffineTransform(scaleX: self.hideToScale, y: self.hideToScale)
currentDetailVC.navigationController?.navigationBar.alpha = 0
}, completion: { (completed) -> Void in
newDetailNavVC.navigationController?.navigationBar.alpha = 0
newDetailNavVC.view.alpha = 0
newDetailNavVC.view.transform = newDetailNavVC.view.transform.scaledBy( x: self.showFromScale, y: self.showFromScale )
splitVC.showDetailViewController( newDetailNavVC, sender: sourceVC)
// Show new view
UIView.animate( withDuration: self.animationDuration / 2.0, animations: { () -> Void in
newDetailNavVC.view.alpha = 1
newDetailNavVC.view.transform = newDetailNavVC.view.transform.scaledBy( x: 1 / self.showFromScale, y: 1 / self.showFromScale )
newDetailNavVC.navigationController?.navigationBar.alpha = 1
}, completion: { (completed) -> Void in
currentDetailVC.view.transform = currentDetailVC.view.transform.scaledBy( x: 1 / self.hideToScale, y: 1 / self.hideToScale)
})
})
}
}
}