在Swift for iOS中使用BWWWalkthroughController进行转换错误

Question

我正在尝试使用开源框架BWWWalkthroughController（链接： https ： //github.com/ariok/BWWalkthrough ）为我的iOS应用程序创建自定义演练，但我无法让它工作！

这是发生错误的类：

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)

让walkthrough = stb.instantiateViewControllerWithIdentifier（“walk”）为！ BWWalkthroughViewController <-----这就是错误发生的地方

    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)
}

}

这是我的错误：

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) 

我确保所有课程都在IB中正确命名，并且我确信所有课程都正确链接（插座，操作等）（我已经查看了许多类似的问题，没有任何答案适合我。想法可能是什么问题？谢谢！

Answer 1

问题可能是Xcode中的一个错误 - 我的“walk”视图控制器是IB中的BWWalkthroughViewController类，但是Xcode不断告诉我。 我最终删除了视图控制器并创建了一个新的视图控制器。