当func编码中的归档对象(使用aCoder:NSCoder)方法在实际的revice中使用swift enum崩溃

Question

在我的singleton班上,我有一个swift枚举:

import UIKit

enum UserType {
    case terant  // 
    case normalUser  // 
    case normalUserFinancialer  // 
}

@objc(UserStaticSwift)
class UserStaticSwift:NSObject, NSCoding {

报道error:

随着console日志:

libc ++ abi.dylib:以NSException类型的未捕获异常终止

在encode:

func encode(with aCoder: NSCoder) {

    /* ?? */
    aCoder.encode(islogin, forKey: "islogin")
    aCoder.encode(type!, forKey: "type")  // crash here in real device 
    aCoder.encode(forOcType, forKey: "forOcType")
    aCoder.encode(username, forKey: "username")
    aCoder.encode(password, forKey: "password")
    aCoder.encode(userId, forKey: "userId")

code我在这里存档我userStatic:

    userStatic.addUserInfo(type: userStatic.type!, dic: userInfoDic, closure: { (void) in

                // success then archive `userStatic`
                let paths:NSArray = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true) as NSArray
                let path = paths.firstObject
                let homePath = "\(path)/\(Global.archive_userStaticData)"

                let _ = NSKeyedArchiver.archiveRootObject(userStatic, toFile: homePath)

            })

我的debug时间archiveRootObject:

该console日志:

(lldb) po NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true) as NSArray

error: Couldn't materialize: couldn't get the value of void: extracting data from value failed

error: errored out in DoExecute, couldn't PrepareToExecuteJITExpression
(lldb) po homePath

error: Couldn't materialize: couldn't get the value of void: extracting data from value failed

error: errored out in DoExecute, couldn't PrepareToExecuteJITExpression

我已经在测试simulator和device,在simulator不存在的问题,在实际device的问题出来.

Answer 1

试试这个问题吧

func encode(with aCoder: NSCoder) {
    aCoder.encode(type.rawValue, forKey: "type")
}

欲获得更多信息

让我们详细讨论这个问题

例如,这是我的枚举:

enum PieceType : Int {
    case empty
    case notEmpty
}

这是我的对象,它是孩子的 NSObject

class Piece: NSObject, NSCoding {
    var islogin: Bool
    var type: PieceType
    var username: String!
    var password: String!

    override init() {
        islogin = false
        type = PieceType.empty
        username = ""
        password = ""
    }

    required init(coder aDecoder: NSCoder) {
        islogin = aDecoder.decodeBool(forKey: "islogin")
        type = PieceType(rawValue: aDecoder.decodeObject(forKey: "type") as! Int)!
        username = aDecoder.decodeObject(forKey: "username") as! String
        password = aDecoder.decodeObject(forKey: "password") as! String

    }

    func encode(with aCoder: NSCoder) {
        aCoder.encode(islogin, forKey: "islogin")
        aCoder.encode(type.rawValue, forKey: "type")
        aCoder.encode(username, forKey: "username")
        aCoder.encode(password, forKey: "password")

    }

}

当你调用 NSKeyedArchiver.archiveRootObject(::)它时会调用func encode(with aCoder: NSCoder)方法并转换NSObject为数据当你尝试取消归档你的对象时,它将调用init(coder aDecoder: NSCoder)方法并NSObject使用Key 转换数据.

但是Enum如果你不能enum直接编码B'Coz它是用户定义数据类型,但rawValue必须是内置数据类型,如Int,String,Float .....所以.这就是为什么当你尝试编码时enum你需要使用rawValue

我希望你能得到点.