Ios RestKit JSON空值崩溃

我有这个问题。我正在Swift中开发应用程序，并使用RestKit检索数据并将其发布回API。然而，我遇到了路障。如果检索到的JSON负载包含一些空值，则应用程序将崩溃，并显示以下消息：

***由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“-[NSNull length]：未识别的选择器已发送到实例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"
  }
}

---

办公室、电话和姓名都会崩溃。

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

@Hotlicks是正确的，空值应由客户端处理。我相信这次崩溃的原因是Restkit不能在Swift中正确地内省类属性类型。我们在项目中通过向RKObjectMapping添加显式targetClass解决了这个问题。因此，不要使用addAttributeMappingsFromDictionary方法，请尝试：

let userMapping = RKObjectMapping(forClass: User.self)
let simpleMapping = RKAttributeMapping(fromKeyPath: "first_name", toKeyPath: "firstName")
simpleMapping.propertyValueClass = NSString.classForCoder() // we used class for coder when we did our project, but you might have success with something else.
userMapping.addPropertyMapping(simpleMapping)

对于关系，您也必须这样做，例如：

let relationshipMapping = RKRelationshipMapping(fromKeyPath: "person", toKeyPath: "person", withMapping: Person.self)
relationshipMapping.propertyValueClass = Person.classForCoder()
userMapping.addPropertyMapping(relationshipMapping)

---

这允许从NSNull自动转换为Swift可选。

显示JSON和映射。改进JSON。将NSNull的处理添加到您的代码中。我已编辑了我的问题以满足您的要求：）我如何使用RestKit处理NSNull？您使用的是什么版本（实际上应该转换为零）RestKit 0.24.0、Xcode 6.1.1、iOS 8.1如果我从映射中删除公司、办公室和电话，我确实尝试过旧版本，它将JSON中的null映射为Swift/Obj中的nil-C@ZdeněkTopič你能说出哪个版本吗？