>可空类型字段,如Int？
>具有枚举类型的属性
>一个可空对象的数组,如[MyObject？]

这有一个解决方法,也就是通过覆盖对象本身中的UnVersionKey方法的setValue.

因为我正在写一个基于反射的通用对象映射器.请参阅EVReflection我想尽量减少这种手动映射.

是否有其他方式自动设置这些属性？

解决方法可以在我的库here的单元测试中找到
这是代码：

class WorkaroundsTests: XCTestCase {
    func testWorkarounds() {
        let json:String = "{\"nullableType\": 1,\"status\": 0,\"list\": [ {\"nullableType\": 2},{\"nullableType\": 3}] }"
        let status = Testobject(json: json)
        XCTAssertTrue(status.nullableType == 1,"the nullableType should be 1")
        XCTAssertTrue(status.status == .NotOK,"the status should be NotOK")
        XCTAssertTrue(status.list.count == 2,"the list should have 2 items")
        if status.list.count == 2 {
            XCTAssertTrue(status.list[0]?.nullableType == 2,"the first item in the list should have nullableType 2")
            XCTAssertTrue(status.list[1]?.nullableType == 3,"the second item in the list should have nullableType 3")
        }
    }
}

class Testobject: EVObject {
    enum StatusType: Int {
        case NotOK = 0
        case OK
    }

    var nullableType: Int?
    var status: StatusType = .OK
    var list: [Testobject?] = []

    override func setValue(value: AnyObject!,forUndefinedKey key: String) {
        switch key {
        case "nullableType":
            nullableType = value as? Int
        case "status":
            if let rawValue = value as? Int {
                status = StatusType(rawValue: rawValue)!
            }
        case "list":
            if let list = value as? NSArray {
                self.list = []
                for item in list {
                    self.list.append(item as? Testobject)
                }
            }
        default:
            NSLog("---> setValue for key '\(key)' should be handled.")
        }
    }
}