线程1：保存NSMutableArray时出现EXC_BAD_INSTRUCTION错误在swift中保存在NSUserDefaults中的自定义对象

Question

我创建了一个自定义对象，它由字符串int，UIImage组成。我试图添加一个NSMutable数组，当试图运行我的项目时，我收到了一个错误。 “线程1：EXC_BAD_INSTRUCTION（代码= EXC_1386_INVOP，子代码= 0x0）”。 如何防止此错误并在此类中使用此nsmutablearray？

这是我的班级：

class develop : NSObject, NSCoding {

    var power: Int!
    var name: String!
    var image: UIImage!
    var flag: UIImage!
    var militaryName: String!

    var relations: NSMutableArray!


    override init() {
        super.init()
    }

    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeInteger(power, forKey:"power")
        aCoder.encodeObject(name, forKey:"name")
        aCoder.encodeObject(image, forKey:"image")
        aCoder.encodeObject(flag, forKey: "flag")
        aCoder.encodeObject(militaryName, forKey: "militaryName")
        aCoder.encodeObject(relations, forKey: "relations")
    }

    required init(coder aDecoder: NSCoder) {

        super.init()

        power = aDecoder.decodeIntegerForKey("power")
        name = aDecoder.decodeObjectForKey("name") as! String
        image = aDecoder.decodeObjectForKey("image")as! UIImage
        flag = aDecoder.decodeObjectForKey("flag") as! UIImage
        militaryName = aDecoder.decodeObjectForKey("militaryName") as! String
        relations = aDecoder.decodeObjectForKey("relations") as! NSMutableArray
    }
}

这里是对象的设置：

func setUpDefaults(){
    //Afghanistan
    Afghanistan.power = 0
    Afghanistan.name = "Afghanistan"
    Afghanistan.image = UIImage(named: "afghan_flag.jpg")!
    Afghanistan.flag = UIImage(named: "afghan_flag.jpg")!
    Afghanistan.militaryName = "Afghan Military"
    Afghanistan.relations = [New_Zealand]
}

这是装载：

class Test:UIViewController {


@IBOutlet var Label: UILabel!
@IBOutlet var imageView: UIImageView!

override func viewDidLoad() {
    //Afganistan


    setUpDefaults()
    let developData = NSKeyedArchiver.archivedDataWithRootObject(Afghanistan)
    NSUserDefaults().setObject(developData, forKey: "Afg")


    if let loadedData = NSUserDefaults().dataForKey("Afg") {
        if let loadedDevelop = NSKeyedUnarchiver.unarchiveObjectWithData(loadedData) as? develop{
            Label.text = Afghanistan.militaryName
            imageView.image = loadedDevelop.flag
        }
    }

   }
}