UIStoryboardSegue:顶视图没有向下滑动
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【中文标题】UIStoryboardSegue:顶视图没有向下滑动【英文标题】:UIStoryboardSegue: top view is not sliding down 【发布时间】:2015-08-04 08:20:59 【问题描述】:我有以下 swift 代码,我想要实现的是从顶部滑落的 segue。我希望 secondVCView 位于 firstVCView 下方,并且希望 firstVCView 滑出显示 secondVCView。
目前没有动画,只是闪烁到第二个VCView。
非常感谢
import UIKit
class TopToBottomSegue: UIStoryboardSegue
override func perform()
// Assign the source and destination views to local variables.
var firstVCView = self.sourceViewController.view as UIView!
var secondVCView = self.destinationViewController.view as UIView!
// Get the screen width and height.
let screenWidth = UIScreen.mainScreen().bounds.size.width
let screenHeight = UIScreen.mainScreen().bounds.size.height
// Specify the initial position of the destination view.
secondVCView.frame = CGRectMake(0, 0, screenWidth, screenHeight)
// Access the app's key window and insert the destination view below the current (source) one.
let window = UIApplication.sharedApplication().keyWindow
window?.insertSubview(secondVCView, belowSubview: firstVCView)
// Animate the transition.
UIView.animateWithDuration(0.4, animations: () -> Void in
firstVCView.frame = CGRectOffset(firstVCView.frame, 0.0, screenHeight)
//secondVCView.frame = CGRectOffset(secondVCView.frame, -screenWidth, 0.0)
) (Finished) -> Void in
self.sourceViewController.presentViewController(self.destinationViewController as! UIViewController,
animated: false,
completion: nil)
【问题讨论】:
【参考方案1】:据我所知,您需要在 animateWithduration 块中调用 layoutIfNeed 才能获得流畅的动画。
问候
【讨论】:
【参考方案2】:我不确定这是否是正确的方法,但我设法通过插入两个视图使其工作。
L
--
import UIKit
class TopToBottomSegue: UIStoryboardSegue
override func perform()
// Assign the source and destination views to local variables.
let firstVCView = self.sourceViewController.view as UIView!
let secondVCView = self.destinationViewController.view as UIView!
// Get the screen width, height and status bar height.
let screenWidth = UIScreen.mainScreen().bounds.size.width
let screenHeight = UIScreen.mainScreen().bounds.size.height
let statusBarHeight = self.statusBarHeight()
// Specify the initial position of both views.
secondVCView.frame = CGRectMake(0.0, 0.0, screenWidth, screenHeight)
firstVCView.frame = CGRectMake(0.0, statusBarHeight, screenWidth, screenHeight)
// Access the app's key window and insert the destination view below the current (source) one.
let window = UIApplication.sharedApplication().keyWindow
window?.insertSubview(firstVCView, aboveSubview: secondVCView)
window?.insertSubview(secondVCView, belowSubview: firstVCView)
// Animate the transition.
UIView.animateWithDuration(0.3, animations: () -> Void in
firstVCView.frame = CGRectOffset(firstVCView.frame, 0.0, screenHeight)
) (Finished) -> Void in
self.sourceViewController.presentViewController(self.destinationViewController as UIViewController,
animated: false,
completion: nil)
func statusBarHeight() -> CGFloat
let statusBarSize = UIApplication.sharedApplication().statusBarFrame.size
return Swift.min(statusBarSize.width, statusBarSize.height)
【讨论】:
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