Question

以下是Json输出的代码：

let params : [[String : AnyObject]]  = [["name" : "action", "value" : "pay" ],["name" : "cartJsonData" , "value" : ["total": 1,"rows":[["quantity": “1” ,"title":"Donation for SMSF India - General Fund","price":"1","itemId":"DN001","cost": “1”,”currency":"INR"]]]], ["name" : "center", "value" : "Chennai"], ["name" : "flatNumber", "value" : "503"], ["name" : "panNumber", "value" : ""], ["name" : "payWith"], ["name" : "reminderFrequency","value" : "Monthly"],  ["name" : "shipToAddr1"], ["name" : "shipToAddr2"], ["name" : "shipToCity"], ["name" : "shipToCountryName" , "value" : "India"], ["name" : "shipToEmail", "value" : “01034_186893@gmail.com"], ["name" : "shipToFirstName" , "value": "4480101010"], ["name" : "shipToLastName"], ["name" : "shipToPhone", "value" : "4480101010"], ["name" : "shipToState"], ["name" : "shipToZip"], ["name" : "userId", "value" : “null”], ["name" : "shipToCountry", "value" : "IN"]]

var jsonObject: NSData? = nil

do {
   jsonObject = try NSJSONSerialization.dataWithJSONObject(params, options: NSJSONWritingOptions())
   print(jsonObject) // This will print the below json. 
} 
catch{}

通过打印jsonObject，我得到了这个。

[{＆＃34; value＆＃34;：＆＃34; pay＆＃34;，＆＃34; name＆＃34;：＆＃34; action＆＃34; }，{＆＃34; value＆＃34;：{＆＃34; rows＆＃34;：[{ ＆＃34;价格＆＃34;：＆＃34; 1＆＃34;，＆＃34;数量＆＃34;：＆＃34; 1＆＃34;，＆＃34;费用＆＃34;：＆＃34; 1＆＃34;，＆＃34;货币＆＃34;：＆＃34; INR＆＃34;，＆＃34; itemId＆＃34;：＆＃34; DN001＆＃34;，＆＃34; title＆＃34;：＆＃34;为SMSF印度捐款 - 普通基金＆＃34; }，＆＃34; total＆＃34;：1}，＆＃34; name＆＃34;：＆＃34; cartJsonData＆＃34; }，{＆＃34;价值＆＃34;：＆＃34; Chennai＆＃34;，＆＃34; name＆＃34;：＆＃34; center＆＃34; }，{＆＃34; value＆＃34;：＆＃34; 503＆＃34;，＆＃34; name＆＃34;：＆＃34; flatNumber＆＃34; }，{ ＆＃34;价值＆＃34;：＆＃34;＆＃34;，＆＃34;名称＆＃34;：＆＃34; panNumber＆＃34; }，{＆＃34; name＆＃34;：＆＃34; payWith＆＃34; }，{＆＃34;价值＆＃34;：＆＃34;每月＆＃34;，＆＃34;名称＆＃34;：＆＃34;提醒频率＆＃34; }，{＆＃34; name＆＃34;：＆＃34; shipToAddr1＆＃34; }，{ ＆＃34; name＆＃34;：＆＃34; shipToAddr2＆＃34; }，{＆＃34; name＆＃34;：＆＃34; shipToCity＆＃34; }，{＆＃34;价值＆＃34;：＆＃34;印度＆＃34;，＆＃34; name＆＃34;：＆＃34; shipToCountryName＆＃34; }，{＆＃34; value＆＃34;：＆＃34; 01034_186893@gmail.com"，＆＃34; name＆＃34;：＆＃34; shipToEmail＆＃34; }，{＆＃34; value＆＃34;：＆＃34; 4480101010＆＃34;，＆＃34; name＆＃34;：＆＃34; shipToFirstName＆＃34; }，{＆＃34; name＆＃34;：＆＃34; shipToLastName＆＃34; }，{＆＃34;价值＆＃34;：＆＃34; 4480101010＆＃34;，＆＃34; name＆＃34;：＆＃34; shipToPhone＆＃34; }，{＆＃34; name＆＃34;：＆＃34; shipToState＆＃34; }，{ ＆＃34; name＆＃34;：＆＃34; shipToZip＆＃34; }，{＆＃34; value＆＃34;：＆＃34; null＆＃34;，＆＃34; name＆＃34;：＆＃34; userId＆＃34; }，{ ＆＃34;价值＆＃34;：＆＃34; IN＆＃34;，＆＃34;名称＆＃34;：＆＃34; shipToCountry＆＃34; }]

我希望JSON采用以下格式。

[{“name”：“action”，“value”：“pay”}，{“name”：“cartJsonData”， “值”： “{\”total \“：1，\”rows \“：[{\”itemId \“：\”DN002 \“，\”title \“：\”捐款 SMSF印度 - 将军基金\”，\”数量\”：\” 100 \”，\”货币\”：\” INR \”，\”价格\”：\” 1 \”，\”成本\”：\” 100 \ “}]}” }，{“name”：“center”，“value”：“Chennai”}，{“name”：“flatNumber”， “value”：“”}，{“name”：“panNumber”，“value”：“ASSDDBBDJD”}，{ “name”：“payWith”}，{“name”：“reminderFrequency”，“value”：“每月” }，{“name”：“shipToAddr1”}，{“name”：“shipToAddr2”}，{“name”： “shipToCity”}，{“name”：“shipToCountryName”，“value”：“India”}，{ “name”：“shipToEmail”，“value”：“Sudhakar@gmail.com”}，{“name”： “shipToFirstName”，“value”：“Raju”}，{“name”：“shipToLastName”}，{ “name”：“shipToPhone”，“value”：“1234567890”}，{“name”： “shipToState”}，{“name”：“shipToZip”}，{“name”：“userId”，“value”： “null”}，{“name”：“shipToCountry”，“value”：“IN”}]

怎么做？只需要更改cartJsonData中的值。有人可以帮我解决这个问题吗？

Answer 1

试试这个。

status_id

Answer 2

Swift （截至2018年7月10日）

func jsonToString(json: AnyObject){
    do {
        let data1 =  try JSONSerialization.data(withJSONObject: json, options: JSONSerialization.WritingOptions.prettyPrinted) // first of all convert json to the data
        let convertedString = String(data: data1, encoding: String.Encoding.utf8) // the data will be converted to the string
        print(convertedString ?? "defaultvalue")
    } catch let myJSONError {
        print(myJSONError)
    }

}

Answer 3

Swift 4.0

static func stringify(json: Any, prettyPrinted: Bool = false) -> String {
    var options: JSONSerialization.WritingOptions = []
    if prettyPrinted {
      options = JSONSerialization.WritingOptions.prettyPrinted
    }

    do {
      let data = try JSONSerialization.data(withJSONObject: json, options: options)
      if let string = String(data: data, encoding: String.Encoding.utf8) {
        return string
      }
    } catch {
      print(error)
    }

    return ""
}

用法

stringify(json: ["message": "Hello."])

Answer 4

使用新的基于Encodable的API，您可以使用String（init：encoding）初始化器获取JSON文件的字符串版本。我在Playground中运行了这个，最后一个打印语句给了我

json {"year":1961,"month":4}

似乎格式详细使用了最少数量的字符。

struct Dob: Codable {
    let year: Int
    let month: Int
}

let dob = Dob(year: 1961, month: 4)
print("dob", dob)

if let dobdata = try? JSONEncoder().encode(dob) {
    print("dobdata base64", dobdata.base64EncodedString())
    if let ddob = try? JSONDecoder().decode(Dob.self, from: dobdata) {
        print("resetored dob", ddob)
    }
    if let json = String(data: dobdata, encoding: .utf8) {
      print("json", json)
    }
}

Answer 5

Swift 4.x
xcode 10.x

如果您使用的是Swifty JSON

var stringfyJSOn  = yourJSON.description

Answer 6

将JSON对象转换为String的简单方法是： 1.首先创建一个JSON下标值，例如jsonObject [“ fieldName”] 2.使用'.stringValue'属性检索实际的字符串等效项（jsonObject [“ fieldName”]。stringValue）

Answer 7

Xcode 11，将String转换为NSString对我有用。

func jsonToString(json: AnyObject) -> String{
    do {
        let data1 = try JSONSerialization.data(withJSONObject: json, options: JSONSerialization.WritingOptions.prettyPrinted)
        let convertedString = String(data: data1, encoding: String.Encoding.utf8) as NSString? ?? ""
        debugPrint(convertedString)
        return convertedString as String
    } catch let myJSONError {
        debugPrint(myJSONError)
        return ""
    }
}

如何在ios Swift中将JSON转换为String？

7 个答案: