找不到会员＆＃39; DataReadingMappedIfSafe＆＃39;错误

Question

我试试这段代码

 if let path = NSBundle.mainBundle().pathForResource(file as String, ofType: "sks") {
        var sceneData = NSData(contentsOfFile: path, options: .DataReadingMappedIfSafe, error: nil)!

swift 2.0之后出现错误 找不到会员＆＃39; DataReadingMappedIfSafe＆＃39;

该怎么办？