ios - RestKit JSON 空值崩溃

Question

我有这个问题。我正在 Swift 中开发应用程序并使用 RestKit 检索数据并将数据发回 API。但是我遇到了障碍。如果检索到的 JSON 负载包含一些空值，应用程序将崩溃并显示消息:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull length]: unrecognized selector sent to instance 0x1994faba0'

我该怎么办？映射的属性是字符串。

映射对象:

public class User: NSObject {

    public var id: Int? = 0
    public var email: String?
    public var firstName: String?
    public var lastName: String?
    public var name: String?
    public var office: String?
    public var phone: String?
    public var company: String?

}

映射:

let userMapping = RKObjectMapping(forClass: User.self)
userMapping.addAttributeMappingsFromDictionary([
    "id": "id",
    "email": "email",
    "first_name": "firstName",
    "last_name": "lastName",
    "name": "name",
    "company": "company",
    "phone": "phone",
    "office": "office",
])
let responseDescriptor = RKResponseDescriptor(mapping: userMapping, pathPattern: currentUserPath, keyPath: "data", statusCodes: NSIndexSet(index: 200))
objectManager.addResponseDescriptor(responseDescriptor)

JSON 响应:

{
  "status": "ok",
  "data": {
    "id": 1,
    "email": "some@email.com",
    "created_at": 1418832714451,
    "updated_at": 1421077902126,
    "admin": true,
    "first_name": "John",
    "last_name": "Doe",
    "company": null,
    "office": null,
    "phone": null,
    "name": "John Doe"
  }
}

它在以下每一项上崩溃:办公室、电话和姓名。

Answer 1

尝试使用其他版本的 RestKit。 RestKit 代码库中有关于空值绑定(bind)的更改。