Question

我有一个从NSJSONSerialization构建的json字符串，如下所示：

 {
    "credentialMemberControlled" : "",
    "credentialRSVP" : 0,
    "credentialIsCheckedIn" : 0,
    "credentialMember" : {
      "memberEMail" : "",
      "memberJob" : "",
      "memberCompany" : "",
      "memberFirstName" : "test4",
      "memberPhoneNumber" : "",
      "memberLastName" : "test4"
    },
    "credentialTypeName" : "",
    "credentialIsCheckedOut" : 0,
    "credentialComment" : "",
    "credentialHosts" : [
      {
        "hostName" : "testHostName"
      }
    ],
    "credentialCountCheckOut" : 0,
    "credentialCountCheckIn" : 0,
    "credentialId" : "2015081130008",
    "credentialExtensionFields" : [

    ],
    "credentialIsHost" : 0
  }

它是由一个NSManaged类和Shoaib编写的解析器生成的。

（我没有使用Hearst ObjectMapper）从头开始映射我的NSManaged类及其关系。

问题：在等待儿子数据时，我需要更改所有的姓名，以适应具有不同键名的Web服务。

编辑1 ：

所以我的NSManaged Class Credential看起来像这样：

import Foundation
import CoreData

class Credential: NSManagedObject, Mappable {

    @NSManaged var credentialArrivalDate: String?
    @NSManaged var credentialBarCode: String?
    @NSManaged var credentialComment: String?
    @NSManaged var credentialCountCheckIn: Int
    @NSManaged var credentialCountCheckOut: Int
    @NSManaged var credentialDepartureDate: String?
    @NSManaged var credentialId: String?
    @NSManaged var credentialIsArrived: Bool
    @NSManaged var credentialIsCheckedOut: Bool
    @NSManaged var credentialIsHost: Bool
    @NSManaged var credentialLastModificationDate: String?
    @NSManaged var credentialMemberControlled: String?
    @NSManaged var credentialNumberOfPeople: Int
    @NSManaged var credentialRSVP: Int
    @NSManaged var credentialTypeId: String?
    @NSManaged var credentialTypeName: String?
    @NSManaged var credentialZoneId: String?
    @NSManaged var credentialZoneName: String?
    @NSManaged var credentialHosts: Set<Host>?
    @NSManaged var credentialMember: Member
    @NSManaged var credentialExtensionFields: Set<ExtensionFields>?
    @NSManaged var credentialDeltaFirstCheckIn: String?
    @NSManaged var credentialDeltaFirstCheckOut: String?
    @NSManaged var credentialIsCheckedIn: Bool
}

我创建了一个新的Credential实体，如下所示：

// create Credential entity
let newCredential = NSEntityDescription.insertNewObjectForEntityForName("Credential", inManagedObjectContext: self.managedObjectContext!) as! Credential

然后我检索一些文本字段值并将其提供给我的newCredential：

// set credential values
newCredential.setValue(textFieldType.text, forKey: "credentialTypeName")

等

在某些时候，我通过其ID：

检索我的“当前正在创建的”凭据

// create a request to fetch the credential
let requestGuest = NSFetchRequest(entityName: "Credential")

// set a predicate to retrieve the credential according to its Id
requestGuest.predicate = NSPredicate(format: "credentialId = %@", newCredential.credentialId!)
// execute request
let fetchedGuest = (managedObjectContext!.executeFetchRequest(requestGuest, error:nil))!

// convert fetched Guest to data
let dataInArr: NSArray = ManagedParser.convertToArray(fetchedGuest)

然后我可以使用NSJSONSerialization从该数组中获取JSON数据：

var jsonError : NSError?
jsonCredential = NSJSONSerialization.dataWithJSONObject(dataInArr, options: NSJSONWritingOptions.PrettyPrinted, error: &jsonError)

这就是我在原帖中打印结果的方式：

let stringJSONCredential = NSString(data: jsonCredential!, encoding: NSUTF8StringEncoding)
println(stringJSONCredential!)

我需要做的是：

找到一种方法来转换（几乎）每个键以适应Web服务
找到一种方法，使用Hearst-DD ObjectMapper（）等框架将Credential Entity直接映射到JSON（这会导致我与多对多关系的麻烦）

现在我甚至陷入了字典解决方案，因为我没有本地字典类型来循环，只有一些NSData打印出来。

希望这篇文章更容易理解！

编辑2

这是在使用NSJSONSerialization之前应该映射的数组的（示例）内容，如@vadian所示：

(
        {
        credentialComment = "";
        credentialCountCheckIn = 0;
        credentialCountCheckOut = 0;
        credentialExtensionFields =         (
        );
        credentialHosts =         (
        );
        credentialId = 2015081500280;
        credentialMember =         {
            memberCompany = "";
            memberEMail = "";
            memberFirstName = test6;
            memberJob = "";
            memberLastName = test6;
            memberPhoneNumber = "";
        };
        credentialMemberControlled = "";
        credentialTypeName = "";
    }
)

它仍然有点不完整，这意味着我有更多的键/值对可以添加，但你已经有了这个想法。

它包含的密钥是我需要更改以适应我的Web服务的密钥，这就是我被困住的地方。

再次感谢您的贡献

Answer 1

这是一个例子。不是递归的，但你已经有了这个想法。

typealias SpecialDictionary = [String: AnyObject]

var dictionary: SpecialDictionary = [
    "credentialMemberControlled" : "",
    "credentialRSVP" : 0,
    "credentialIsCheckedIn" : 0,
    "credentialMember" : [
        "memberEMail" : "",
        "memberJob" : "",
        "memberCompany" : "",
        "memberFirstName" : "test4",
        "memberPhoneNumber" : "",
        "memberLastName" : "test4"
    ],
    "credentialTypeName" : "",
    "credentialIsCheckedOut" : 0,
    "credentialComment" : "",
    "credentialHosts" : [
    [
    "hostName" : "testHostName"
    ]
    ],
    "credentialCountCheckOut" : 0,
    "credentialCountCheckIn" : 0,
    "credentialId" : "2015081130008",
    "credentialExtensionFields" : [

    ],
    "credentialIsHost" : 0
]

let keysMapping = [
    "credentialMemberControlled": "memberControlled",
    "credentialRSVP" : "rsvp",
    "credentialIsCheckedIn" : "checkedIn",
]

func processDictionaryForWebservice(dictionary: SpecialDictionary) -> SpecialDictionary {
    var result = SpecialDictionary()
    for element in dictionary {
        let value: AnyObject = element.1
        let key = keysMapping[element.0] ?? element.0
        result[key] = value
    }
    return result
}

Answer 2

修改：考虑 EDIT 2 的问题

如有必要，请创建新文件localizable.strings。

插入键/值对，左侧是当前值，右侧是新值，例如

"credentialCountCheckIn" = "countCheckIn";
"credentialCountCheckOut" = "countCheckOut;

使用此代码，假设dataInArr包含一个字典数组，其中每个字典的键都必须映射。

var jsonError : NSError?
var resultArray = [Dictionary<String, AnyObject>]()
for aDictionary in dataInArr as! [Dictionary<String, AnyObject>] {
  var modifiedDictionary = Dictionary<String, AnyObject>()
  for (key, value) in aDictionary {
    modifiedDictionary[NSLocalizedString(key,  comment:"")] = value
  }
  resultArray.append(modifiedDictionary)
}
let jsonCredential = NSJSONSerialization.dataWithJSONObject(resultArray, options: NSJSONWritingOptions(), error: &jsonError)

如果在.strings文件中找不到匹配的密钥，则密钥不会更改

在Swift

2 个答案: