Question

我从Web服务接收JSON字典，我需要将返回值映射到现有值。这基本上就是我想要做的事情：

class Contract {
var contractID: String?

var ebState: String?
var ibState: String?
var importerState: String?

var exportersBankRefNo: String?
var importersBankRefNo: String?
}

let contract1 = Contract()
contract1.contractID = "001"

let contract2 = Contract()
contract2.contractID = "002"

// This is the JSON return dictionary
let exportAppnStatusList: [[String: String]] = [["contractID":"001",
    "ExporterBankRefNo":"ExporterBankRefNo001",
    "ExporterBankState":"ACCEPTED",
    "ImporterBankRefNo":"",
    "ImporterBankState":"UNKNOWN",
    "ImporterState":"UNKNOWN" ],
  ["contractID":"002",
    "ExporterBankRefNo":"ExporterBankRefNo002",
    "ExporterBankState":"ACCEPTED",
    "ImporterBankRefNo":"ImporterBankRefNo002",
    "ImporterBankState":"ACCEPTED",
    "ImporterState":"UNKNOWN" ]]

我需要使用exportAppnStatusList并填写现有contract1和contract2中的关联值，并按contractID

进行映射

Answer 1

这会使合同中包含可用信息，它会忽略无法找到ID的合同：

for contract in [contract1, contract2] {
    if let contractDict = exportAppnStatusList.filter({$0["contractID"] == contract.contractID}).first {
        contract.exportersBankRefNo = contractDict["ExporterBankRefNo"]
        contract.ebState = contractDict["ExporterBankState"]
        contract.importersBankRefNo = contractDict["ImporterBankRefNo"]
        contract.ibState = contractDict["ImporterBankState"]
        contract.importerState = contractDict["ImporterState"]
    }
}

Answer 2

尝试使用此init（您的类必须从NSObject继承）：

init(jsonDict: [String: String]) {
        super.init()

        for (key, value) in jsonDict {
        if class_respondsToSelector(Contract.self, NSSelectorFromString(key)) {
            setValue(value, forKey: key)
        }
    }
    }

然后你可以这样做：

exportAppnStatusList.forEach {
    print(Contract(jsonDict: $0))
}

Answer 3

为什么不通过映射这样的字典数组来生成合约对象？您需要编写一个自定义初始化程序来获取所有这些参数

string sourceDirectory = @"C:\TestInput\";
string destinationDirectory = @"C:\TestOutput\";

// or with OpenFileDialog.FileNames
string[] inputFiles = System.IO.Directory.GetFiles(sourceDirectory)

foreach(string inputfilePath in inputFiles)
{
    string outputfilePath = System.IO.Path.Combine(destinationDirectory, 
        System.IO.Path.GetFileName(inputfilePath) + "_encrypted");

    //Encrypt here
}

使用Swift从字典数组创建一个Object数组

3 个答案: