在ViewControllers之间转换后无法保存数据

Question

我的应用

的目的

• 我的小项目中有两个ViewControllers，FrontSideViewController和BackSideViewController。
• 我即将使用FrontSideViewController将BackSideViewController翻转为CATransition，同时可以保存每个ViewController的数据。
  

问题描述

1. 意见以animation似乎不是UIAnimationTransition.FlipFromLeft(or)Right的意外方式转换。
2. 翻阅视图后，无法保存以前的视图数据，这意味着当我翻回旧视图时，其微小的数据（如textField's text）就不见了。



我的代码

• 相同的逻辑函数，用于在两个Classes中使用的视图之间进行翻转。




FrontSideViewController.swift

class FrontSideViewController: UIViewController {

var frontSideViewController: FrontSideViewController?
var backSideViewController: BackSideViewController?
var frontSide: Bool = true
@IBOutlet weak var flip_1Button: UIButton!
override func viewDidLoad() {
    super.viewDidLoad()
    frontSideViewController = storyboard?.instantiateViewControllerWithIdentifier("FrontSideViewController") as? FrontSideViewController
    backSideViewController = storyboard?.instantiateViewControllerWithIdentifier("BackSideViewController") as? BackSideViewController
    flip_1Button.addTarget(self, action: "flipViews", forControlEvents: UIControlEvents.TouchUpInside)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func textFieldDoneEditing(sender: UITextField) {
    sender.resignFirstResponder()
}

func flipViews() {

    UIView.beginAnimations("ViewSwitch", context: nil)
    UIView.setAnimationDuration(0.6)
    UIView.setAnimationCurve(.EaseInOut)
    UIView.setAnimationTransition(.FlipFromLeft, forView: view, cache: true)
    backSideViewController?.view.frame = self.view.frame
    frontSideViewController?.willMoveToParentViewController(nil)
    frontSideViewController?.view.removeFromSuperview()
    frontSideViewController?.removeFromParentViewController()
    self.addChildViewController(backSideViewController!)
    self.view.addSubview(backSideViewController!.view)
    backSideViewController?.didMoveToParentViewController(self)

} }

BackSideViewController.swift

class BackSideViewController: UIViewController {

var frontSideViewController: FrontSideViewController?
var backSideViewController: BackSideViewController?
@IBOutlet weak var flip_2Button: UIButton!
override func viewDidLoad() {
    super.viewDidLoad()
    frontSideViewController = storyboard?.instantiateViewControllerWithIdentifier("FrontSideViewController") as? FrontSideViewController
    backSideViewController = storyboard?.instantiateViewControllerWithIdentifier("BackSideViewController") as? BackSideViewController

    flip_2Button.addTarget(self, action: "flipViews", forControlEvents: UIControlEvents.TouchUpInside)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func flipViews() {

    UIView.beginAnimations("ViewSwitch", context: nil)
    UIView.setAnimationDuration(0.6)
    UIView.setAnimationCurve(.EaseInOut)
    UIView.setAnimationTransition(.FlipFromRight, forView: view, cache: true)
    frontSideViewController?.view.frame = self.view.frame
    backSideViewController?.willMoveToParentViewController(nil)
    backSideViewController?.view.removeFromSuperview()
    backSideViewController?.removeFromParentViewController()
    self.addChildViewController(frontSideViewController!)
    self.view.addSubview(frontSideViewController!.view)
    frontSideViewController?.didMoveToParentViewController(self)
}




请教我如何解决这两个问题。

感谢您的帮助。

Ethan Joe