UIPageViewController沒有完成按鈕點擊轉換

Question

我有一個UIPageViewController，處理一個數組viewControllers 當我在他們之間滑動一切都很好，但我有幾個方法（成功登錄後，菜單按鈕點擊後）觸發'跳轉到UIPageViewControllers陣列中的viewController。 每當我跳轉到一個頁面，過渡不完整的，我有一個在兩個viewControllers

之間「卡住」爲了簡單的畫面，我只會添加成功登錄的代碼，因爲我設置的一切同爲按鈕點擊，同樣的事情發生。

這是我UIPageViewController設置：

import UIKit 

class PageViewController: UIPageViewController , UIPageViewControllerDataSource , UIPageViewControllerDelegate , ClubViewControllerDelegate , CustomSvDelegate{ 

//clubvcdelegate protocol method 

func fbLoggedInWithSuccess(){ 
self.displayPageForIndex(index: 4, animated: false) 
} 

//menubuttondelegate protocol method 
func menuButtonPressed0() { 

    self.displayPageForIndex(index: 0, animated: false) 
    self.currentPageIndex = 0 
    self.closeMenu() 
} 

//page swipe control 

lazy var vcArray : [UIViewController] = { 
    return [self.vcInstance (name : "clubVC"), 
      self.vcInstance (name : "menuVC"), 
      self.vcInstance (name : "contactVC"), 
      self.vcInstance (name : "aboutVC"), 
      self.vcInstance (name : "membersVC")] 
    }() 

private func vcInstance(name : String) -> UIViewController{ 
    let storyBoard = UIStoryboard(name: "Main", bundle: nil) 
    return storyBoard.instantiateViewController(withIdentifier: name) 
} 


override func viewDidLoad() { 
    super.viewDidLoad() 
    self.dataSource = self 
    self.delegate = self 
    if let clubVC = vcArray.first { 
     let club = clubVC as! ClubViewController 
     club.delegate = self 
     setViewControllers([clubVC], direction: .forward, animated: true, completion: nil) 
    } 
    self.generateStackView() 
} 


override func viewDidLayoutSubviews() { 
    super.viewDidLayoutSubviews() 
    for view in self.view.subviews { 
     if view is UIScrollView {view.frame = UIScreen.main.bounds} else if view is UIPageControl {view.backgroundColor = UIColor.clear} 
    } 
} 

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

public func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController?{ 
    guard let viewControllerIndex = vcArray.index(of: viewController) else {return nil} 

    let previousIndex = viewControllerIndex - 1 

    guard previousIndex >= 0 else {return vcArray.last} 

    guard vcArray.count > previousIndex else {return nil} 

    return vcArray[previousIndex] 

} 


public func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController?{ 
    guard let viewControllerIndex = vcArray.index(of: viewController) else {return nil} 

    let nextIndex = viewControllerIndex + 1 

    guard nextIndex < vcArray.count else {return vcArray.first} 

    guard vcArray.count > nextIndex else {return nil} 

    return vcArray[nextIndex] 

} 

public func presentationCount(for pageViewController: UIPageViewController) -> Int{ 
    return vcArray.count 
} 


public func presentationIndex(for pageViewController: UIPageViewController) -> Int{ 
    guard let firstViewController = viewControllers?.first , 
    let firstViewControllerIndex = vcArray.index(of: firstViewController) else { 
     return 0 
    } 
    return firstViewControllerIndex 
} 

，這是我建立的東西在那裏fblogin是成功的：

protocol ClubViewControllerDelegate:class { 
func fbLoggedInWithSuccess() 
} 

class ClubViewController: UIViewController , FBSDKLoginButtonDelegate { 
var delegate:ClubViewControllerDelegate? 

func showFbDetails(){ 

    let accesToken = FBSDKAccessToken.current() 

    guard let accesTokenString = accesToken?.tokenString else {return} 

    let credentials = FIRFacebookAuthProvider.credential(withAccessToken: accesTokenString) 

    FIRAuth.auth()?.signIn(with: credentials, completion: { (user, error) in 
     if error != nil { 
      print ("something went wrong" , error!) 
      return 
     } 
     print ("succes") 
     self.delegate?.fbLoggedInWithSuccess() 
    }) 

} 

圖片：

EDIT2 這只是發生在動畫真的，假的時，在完成正常

EDIT3 這是方法我現在用它來設置視圖控制器：

func displayPageForIndex(index : Int , animated : Bool = true){ 
    assert(index >= 0 && index < self.vcArray.count, "Error: Attempting to display a page for an out of bounds index") 
    if self.currentPageIndex == index {return} 
    if index < self.currentPageIndex { 
     self.setViewControllers([self.vcArray[index]], direction: .reverse, animated: false, completion: nil) 
    } else if index > self.currentPageIndex { 
     self.setViewControllers([self.vcArray[index]], direction: .forward, animated: false, completion: nil) 
    } 
} 

我把它叫做fbLoggenInWithSuccess和menuButtonPressed內。 此外，具有可變CURRENTINDEX保存的頁面

Answer 1

當前指數馬特建議刪除viewDidLayoutSubviews解決了這個問題