在Swift for iOS中使用BWWWalkthroughController進行轉換錯誤

Question

我正在嘗試使用開源框架BWWWalkthroughController（鏈接： https ： //github.com/ariok/BWWalkthrough ）為我的iOS應用程序創建自定義演練，但我無法讓它工作！

這是發生錯誤的類：

import UIKit

class StartPageViewController: UIViewController, BWWalkthroughViewControllerDelegate {

override func viewDidLoad() {
    super.viewDidLoad()
}

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)

    let userDefaults = NSUserDefaults.standardUserDefaults()

    if !userDefaults.boolForKey("walkthroughPresented") {

        showWalkthrough()

        userDefaults.setBool(true, forKey: "walkthroughPresented")
        userDefaults.synchronize()
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
}

@IBAction func showWalkthrough(){

    // Get view controllers and build the walkthrough
    let stb = UIStoryboard(name: "Walkthrough", bundle: nil)

讓walkthrough = stb.instantiateViewControllerWithIdentifier（“walk”）為！ BWWalkthroughViewController <-----這就是錯誤發生的地方

    let page_zero = stb.instantiateViewControllerWithIdentifier("walk0") as! UIViewController
    let page_one = stb.instantiateViewControllerWithIdentifier("walk1") as! UIViewController
    let page_two = stb.instantiateViewControllerWithIdentifier("walk2")as! UIViewController

    // Attach the pages to the master
    walkthrough.delegate = self
    walkthrough.addViewController(page_one)
    walkthrough.addViewController(page_two)
    walkthrough.addViewController(page_zero)

    self.presentViewController(walkthrough, animated: true, completion: nil)
}


// MARK: - Walkthrough delegate -

func walkthroughPageDidChange(pageNumber: Int) {
    println("Current Page \(pageNumber)")
}

func walkthroughCloseButtonPressed() {
    self.dismissViewControllerAnimated(true, completion: nil)
}

}

這是我的錯誤：

2015-06-29 00:24:02.951 Up & Down - Minimalistic, Beautiful Counter[13041:715011] Unknown class _TtC43Up & Down - Minimalistic, Beautiful Counter27BWWalkthroughViewController in Interface Builder file.
Could not cast value of type 'UIViewController' (0x10570c418) to 'Up___Down___Minimalistic__Beautiful_Counter.BWWalkthroughViewController' (0x103972fb0).
(lldb) 

我確保所有課程都在IB中正確命名，並且我確信所有課程都正確鏈接（插座，操作等）（我已經查看了許多類似的問題，沒有任何答案適合我。想法可能是什么問題？謝謝！

Answer 1

問題可能是Xcode中的一個錯誤 - 我的“walk”視圖控制器是IB中的BWWalkthroughViewController類，但是Xcode不斷告訴我。 我最終刪除了視圖控制器並創建了一個新的視圖控制器。