XCode升级后出错，IOS8.1，spritekit和after，对象构造‘NSData(contentsOfFile:options: Error：)

Question

我有一个工作游戏，我运行，编译和上传到ITunes连接。但是在更新了XCode并试图用目标ios 8.1 (而不是8.0)编译我的游戏之后。我犯了这个错误。

extension SKNode {
    class func unarchiveFromFile(file : NSString) -> SKNode? {

        let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks")

// ERROR: 
// 'dataWithContentsOfFile(_:options:error:)' is unavailable: use object construction 'NSData(contentsOfFile:options:error:)'

        var sceneData = NSData.dataWithContentsOfFile(path!, options: .DataReadingMappedIfSafe, error: nil)


        var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)

        archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
        let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as GameScene
        archiver.finishDecoding()
        return scene
    }
}

我在这里没有碰过unarchiveFromFile方法，通过搜索google，我找不到有同样问题的人。在这里真的迷路了。

编辑:将代码更新为以下内容(在注释之后)

extension SKNode {
    class func unarchiveFromFile(file : NSString) -> SKNode? {

        let path = NSBundle.mainBundle().pathForResource(file, ofType: "sks")

        var sceneData = NSData.dataWithContentsOfFile(path!, options: .DataReadingMappedIfSafe, error: nil)
        var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)

        archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
        let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as GameScene
        archiver.finishDecoding()
        return scene
    }
}

现在它编译并运行，但随后模拟崩溃！

我只知道这个：

dyld`dyld_fatal_error:
0x1fe1e08c:  trap   
0x1fe1e090:  nop     

Answer 1

你可以试试：

extension SKNode {
    class func unarchiveFromFile(file : NSString) -> SKNode? {

    if let path = NSBundle.mainBundle().pathForResource(file as String, ofType: "sks") {

        var sceneData = NSData()
        do {
            try sceneData = NSData(contentsOfFile: path, options:NSDataReadingOptions.DataReadingMappedIfSafe)

        } catch {
            abort()
        }

        let archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)

        archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
        let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as! GameScene
        archiver.finishDecoding()
        return scene
    } else {
        return nil
    }
}