I'm trying to send json object to server. The server expects object to be in this format:
{
"Lat": 10.33688590000001,
"Name": "nameOfSomething",
"Lng": 58.43135800000005
}
but the object that I'm getting after defining object is this:
[
"Lat": 10.33688590000001,
"Name": nameOfSomething, //this is missing ""
"Lng": 58.43135800000005
]
the code that I'm using is this:
let jsonObject: [String: AnyObject] = [
"Lat": lat,
"Name": nameOfSender.text!,
"Lng": lng
]
let jsonData = try! NSJSONSerialization.dataWithJSONObject(jsonObject, options: .PrettyPrinted)
Any ideas how to solve this?
Please Look on this. it will give you correct answer.
/// Use this method to get JSON string from Dictionary.
///
///
/// - returns: `String` for Dictionary
func getJSONStringForDictionary(dict:[String:AnyObject]) -> String {
do {
let jsonData = try NSJSONSerialization.dataWithJSONObject(dict, options: [])
if let jsonString = NSString(data: jsonData, encoding: NSUTF8StringEncoding) as? String {
return jsonString
}
// here "jsonData" is the dictionary encoded in JSON data
} catch let error as NSError {
print(error)
}
return ""
}
/* calling */
let json = self.getJSONStringForDictionary(jsonObject)
print(json)
//{
"Lat" : 10.33688590000001,
"Name" : "nameOfSomething",
"Lng" : 58.43135800000005
}
Related
This is my first Question so I don't know a better way to ask it. My question is in Swift I am converting this String:
let points = "[{\"lat\":\"33.6240836\", \"lng\":\"73.0686886\"},{\"lat\":\"33.6235471\", \"lng\":\"73.0686249\"},{\"lat\":\"33.6234177\" , \"lng\":\"73.0681210\"},{\"lat\":\"33.6232655\" , \"lng\":\"73.0676921\"},{\"lat\":\"33.6241488\" , \"lng\":\"73.0683039\"}]"
By using the method:
let data = points.data(using: .utf8)!
do {
if let jsonArray = try JSONSerialization.jsonObject(with: data, options : .allowFragments) as? [Dictionary<String,Any>]
{
print(jsonArray) // use the json here
} else {
print("bad json")
}
} catch let error as NSError {
print(error)
}
But it returns:
[["lng": 73.0686886, "lat": 33.6240836], ["lng": 73.0686249, "lat": 33.6235471], ["lng": 73.0681210, "lat": 33.6234177], ["lng": 73.0676921, "lat": 33.6232655], ["lng": 73.0683039, "lat": 33.6241488]]
While what I need is:
[{"lng": "73.0686886", "lat": "33.6240836"}, {"lng": "73.0686249", "lat": "33.6235471"}, {"lng": "73.0681210", "lat": "33.6234177"}, {"lng": "73.0676921", "lat": "33.6232655"}, {"lng": "73.0683039", "lat": "33.6241488"}]
Can any body helps me how to achieve it in swift?
You asked about Array of Object so declare a struct and decode the JSON with Decodable
let points = "[{\"lat\":\"33.6240836\", \"lng\":\"73.0686886\"},{\"lat\":\"33.6235471\", \"lng\":\"73.0686249\"},{\"lat\":\"33.6234177\" , \"lng\":\"73.0681210\"},{\"lat\":\"33.6232655\" , \"lng\":\"73.0676921\"},{\"lat\":\"33.6241488\" , \"lng\":\"73.0683039\"}]"
struct Point : Decodable {
let lat, lng: String
}
let data = Data(points.utf8)
do {
let jsonArray = try JSONDecoder().decode([Point].self, from: data)
print(jsonArray)
} catch { // never cast to NSError
print(error)
}
Im trying to decode some JSON, but it's not parsing it. I think it may have something to to with either an incorrect KeyPath or the object itself. But I cannot figure it out.
This is the JSON that I want to decode (I want the array inside the docs path):
{
"status": 200,
"data": {
"docs": [
{
"_id": "60418a6ce349d03b9ae0669e",
"title": "Note title",
"date": "2015-03-25T00:00:00.000Z",
"body": "this is the body of my note.....",
"userEmail": "myemail#gmail.com"
}
],
"total": 1,
"limit": 20,
"page": 1,
"pages": 1
},
"message": "Notes succesfully Recieved"
}
Here's my decode function:
extension JSONDecoder {
func decode<T: Decodable>(_ type: T.Type, from data: Data, keyPath: String) throws -> T {
let toplevel = try JSONSerialization.jsonObject(with: data)
if let nestedJson = (toplevel as AnyObject).value(forKeyPath: keyPath) {
let nestedJsonData = try JSONSerialization.data(withJSONObject: nestedJson)
return try decode(type, from: nestedJsonData)
} else {
throw DecodingError.dataCorrupted(.init(codingPath: [], debugDescription: "Nested json not found for key path \"\(keyPath)\""))
}
}
}
And i'm calling it like this:
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
let notes = try decoder.decode([Note].self, from: data, keyPath: "data.docs")
Finally, this is my Note Struct:
struct Note: Codable {
var title: String?
let date: Date?
var body: String?
let userEmail: String?
}
The problem was that I was trying to decode date as a Date object instead of a String as is shown on the JSON.
Thanks #vadian!
I'm trying to parse some data from JSON, I already got that working with another API but now I have another struct and I'm getting typeMissmatch Erros...
The JSON looks like:
{
"status": 200,
"data": {
"date": "2018-04-07T00:00:00.508Z",
"featured": [
{
"id": "2345",
"name": "name",
"price": "1,000",
"priceIcon": "String",
"priceIconLink": "URLString",
"images": {
"icon": "URLString",
"png": "URLString",
"gallery": "URLString",
"featured": "URLString"
},
"rarity": "1String",
"type": "1String",
"readableType": "1String"
}
],
"daily": [
{
"id": "12324",
"name": "name",
"price": "1,500",
"priceIcon": "String",
"priceIconLink": "URLString",
"images": {
"icon": "URLString",
"png": "URLString",
"gallery": "URLString",
"featured": "URLString"
},
"rarity": "1String",
"type": "1String",
"readableType": "1String"
}
]
}}
And a Codable struct like that:
struct Base : Codable {
let status : Int
let data : DataItems
}
struct DataItems : Codable {
let date : String
let featured : [Featured]
let daily : [Daily]
}
struct Featured : Codable {
let id : String
let name : String
let price : String
let priceIcon : String
let priceIconLink : String
let images : Images
let rarity : String
let type : String
let readableType : String
}
struct Daily : Codable {
let id : String
let name : String
let price : String
let priceIcon : String
let priceIconLink : String
let images : Images
let rarity : String
let type : String
let readableType : String
}
struct Images : Codable {
let icon : String
let png : String
let gallery : String
let featured : String
}
But when I try to decode that Json I get a "Swift.DecodingError.typeMismatch" Error:
▿ Swift.DecodingError.typeMismatch
▿ typeMismatch: (2 elements)
- .0: Swift.String #0
▿ .1: Swift.DecodingError.Context
▿ codingPath: 5 elements
- CodingKeys(stringValue: "data", intValue: nil)
- CodingKeys(stringValue: "daily", intValue: nil)
▿ _JSONKey(stringValue: "Index 0", intValue: 0)
- stringValue: "Index 0"
▿ intValue: Optional(0)
- some: 0
- CodingKeys(stringValue: "images", intValue: nil)
- CodingKeys(stringValue: "featured", intValue: nil)
- debugDescription: "Expected to decode String but found a number instead."
- underlyingError: nil
My JSON Decoder:
enum Result<Value> {
case success(Value)
case failure(Error)
}
func getItems(for userId: Int, completion: ((Result<Base>) -> Void)?) {
var urlComponents = URLComponents()
urlComponents.scheme = "https"
urlComponents.host = "api.jsonbin.io"
urlComponents.path = "/myurl"
let userIdItem = URLQueryItem(name: "userId", value: "\(userId)")
urlComponents.queryItems = [userIdItem]
guard let url = urlComponents.url else { fatalError("Could not create URL from components") }
var request = URLRequest(url: url)
request.httpMethod = "GET"
let config = URLSessionConfiguration.default
config.httpAdditionalHeaders = [
"secret-key": "xyz"
]
let session = URLSession(configuration: config)
let task = session.dataTask(with: request) { (responseData, response, responseError) in
DispatchQueue.main.async {
if let error = responseError {
completion?(.failure(error))
} else if let jsonDataTest = responseData {
// Now we have jsonData, Data representation of the JSON returned to us
// from our URLRequest...
// Create an instance of JSONDecoder to decode the JSON data to our
// Codable struct
let decoder = JSONDecoder()
do {
// We would use Post.self for JSON representing a single Post
// object, and [Post].self for JSON representing an array of
// Post objects
let posts = try decoder.decode(Base.self, from: jsonDataTest)
completion?(.success(posts))
} catch {
completion?(.failure(error))
}
} else {
let error = NSError(domain: "", code: 0, userInfo: [NSLocalizedDescriptionKey : "Data was not retrieved from request"]) as Error
completion?(.failure(error))
}
}
}
task.resume()
}
var base:Base?
func loadJson() {
getItems(for: 1) { (result) in
switch result {
case .success(let base):
self.base = base
dump(base)
case .failure(let error):
fatalError("error: \(error.localizedDescription)")
}
}
}
I'm new to swift and not sure what this Error is telling me or where the problem "decode String but found a number" is. I think there is something wrong with me struct.. I hope someone can help me there.
Please show the code where you want to parse the data to json.
let urlString = "your_url.json"
guard let url = URL(string: urlString) else { return }
URLSession.shared.dataTask(with: url) { (data, response, error) in
if error != nil {
print(error!.localizedDescription)
}
guard let data = data else { return }
do {
//Decode retrived data with JSONDecoder and assing type of Article object
let baseData = try JSONDecoder().decode(Base.self, from: data)
print(baseData) //whole project
print(baseData.status) //200.0
print(baseData.data.date)
for day in baseData.data.daily {
print(day.id)
print(day.images.icon)
print(day.images.featured)
print(day.images.gallery)
print(day.images.png)
print(day.name)
print(day.price)
print(day.priceIcon)
print(day.priceIconLink)
print(day.rarity)
print(day.readableType)
print(day.type)
}
for feature in baseData.data.featured {
print(feature.id)
print(feature.images.icon)
print(feature.images.featured)
print(feature.images.gallery)
print(feature.images.png)
print(feature.name)
print(feature.price)
print(feature.priceIcon)
print(feature.priceIconLink)
print(feature.rarity)
print(feature.readableType)
print(feature.type)
}
} catch let jsonError {
print(jsonError)
}
}.resume()
I tried this and it works for me.
By the way I was a little bit confused that Featured and Daily have all the same variables but are different models.
EDIT
Your posted data in the question are valid. The json from https://api.jsonbin.io/b/5acbd2dc214f9a2b84c6f167/1 is wrong or not consistent.
There is "featured": false in Daily and in Featured it is a string. In the struct is a string expected. So you will get a mismatch. Once you try to parse a string (works) and then you try to parse a boolean to a string (error).
I've got an API endpoint that returns JSON in the following format:
[
{
"id": "1",
"name": "John"
},
{
"id": "2",
"name": "Jane"
},
{
"id": "3",
"name": "Nick"
}
]
I am trying to parse this in Swift 3, but I can only find examples to parse JSON formatted like so:
{
"blogs": [
{
"needspassword": true,
"id": 73,
"url": "http://remote.bloxus.com/",
"name": "Bloxus test"
},
{
"needspassword": false,
"id": 74,
"url": "http://flickrtest1.userland.com/",
"name": "Manila Test"
}
],
"stat": "ok"
}
, which has an extra level above what mine does.
So, where examples I've seen are simply parsing their data like jsonResponse["blogs"], I can't do that as my format is different.
How can I parse the format I've got, or how can I return a format that is easier to parse?
Any suggestions appreciated, thanks!
You can just do the following :
let data = // Data received from WS
do {
let json = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions()) as? [[String : String]]
//json is now an array from dictionary matching your model
}
catch {
//handle error
}
This will parse it when placed in the network call.
do {
let json = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions()) as! [[String : AnyObject]]
let firstPerson = json[0]
print(firstPerson)
let id = firstPerson["id"] as! String
print(id)
let name = firstPerson["name"] as! String
print(name)
} catch {
//handle error
}
Also, I tend to be against advising third party libraries, but SwiftyJSON is an exception I make. If you want to try it, add this to your pod file:
pod SwiftyJSON', '3.0.0'
Documentation: https://github.com/SwiftyJSON/SwiftyJSON
EDIT - Answering Comment:
Replacement line:
if let id = firstPerson["id"] as? String {
print(id)
}
Replacement line (if you need to hold on to the value):
var thisId: String?
if let id = firstPerson["id"] as? String {
thisId = id
}
print(thisId ?? "")
i don't really know swift but there might be the equivalent of ajax json encoding (server side you json_encode your array and client side you json_decode the response)
the idea is to have the same formatter that encodes and decodes the data
i currently trying to decode Json in Xcode, but i not succed to get one of them.
This is what i get :
[
{
"id": "1",
"title": "bmw",
"price": "500.00",
"description": "330",
"addedDate": "2015-05-18 00:00:00",
"user_id": "1",
"user_name": "CANOVAS",
"user_zipCode": "32767",
"category_id": "1",
"category_label": "VEHICULES",
"subcategory_id": "2",
"subcategory_label": "Motos",
"bdd": {}
}
"pictures":
[
{ "name": "http://cars.axlegeeks.com/sites/default/files/4315/media/images/2014_BMW_Z4_sDrive28i_3790993.jpg"
}
]
}
]
And i want to get the value of "name" for the "Pictures" lines but i have the error "unexpectedly found nil while unwrapping value".
For the others values i proceed this way :
let jsonData:NSDictionary = NSJSONSerialization.JSONObjectWithData(urlData!, options:NSJSONReadingOptions.MutableContainers , error: &error) as! NSDictionary
//Browse into JSON to get datas
let resp = jsonData["0"] as! NSDictionary
let user_nameR = resp["user_name"] as! String
let user_zipCodeR = resp["user_zipCode"] as! String
let titleR = resp["title"] as! String
let priceR = resp["price"] as! String
let descriptionR = resp["description"] as! String
Thank's for your help !
Pictures is in not in the subdictionary your other values are. This should work, but you should check all values if they are nil before you force cast them.
if let pictureArray = jsonData["pictures"] as? NSArray
{
if let pictureDict = pictureArray.firstObject as? NSDictionary
{
if let pictureName = pictureDict.objectForKey("name") as? String
{
NSLog("Picture name: %#", pictureName)
}
}
}
jsonData contains two sub-dictionaries, one without a key and one with key 'pictures'. Pictures is an array containing one sub-dictionary.