I am trying to convert jsonString.rawString() to JSON object, but it returns nil.
let jsonData = newsfeedData.rawString()?.data(using: .utf8)
let object = try? JSONSerialization.jsonObject(with: jsonData!, options: .mutableContainers)
print(object) //it returns nil
This is the jsonString:
Printing description of newsfeedData.rawString:
"Data:[{\"UserID\":1,\"post\":[{\"PostId\":1,\"UserId\":1,\"UserName\":\"party Patel\",\"ImagePath\":\"/Files/User/user_20180606_040913967_Hydrangeas.jpg\",\"FileId\":2108,\"FileName\":\"Business Category.png\",\"Email\":\"parth.patel#shaligraminfotech.com\",\"Location\":\"Ahmedabad\",\"PostDescription\":\"P7800\",\"PostPath\":\"/Files/NewsFeed/Photo/fd1c7fcf-e1d0-4ffe-afb4-42bb3fea4fa4.PNG\",\"UserRole\":\"Business\",\"BusinessName\":\"Shaligram infotech\",\"PostType\":false,\"Type\":\"Photo\",\"AdminUserId\":0,\"DisplayText\":null,\"PostCreatedDate\":\"06/08/2018\",\"LikeCount\":4,\"CommentCount\":4,\"ViewCount\":3},{\"PostId\":3,\"UserId\":1,\"UserName\":\"party Patel\",\"ImagePath\":\"/Files/User/user_20180606_040913967_Hydrangeas.jpg\",\"FileId\":2110,\"FileName\":\"DiscovrUS.mov\",\"Email\":\"parth.patel#shaligraminfotech.com\",\"Location\":\"Ahmedabad\",\"PostDescription\":\"P7800\",\"PostPath\":\"/Files/NewsFeed/Video/ab48c228-d7b5-4dff-af56-31a0ac159a35.MOV\",\"UserRole\":\"Business\",\"BusinessName\":\"Shaligram infotech\",\"PostType\":true,\"Type\":\"Video\",\"AdminUserId\":0,\"DisplayText\":null,\"PostCreatedDate\":\"06/08/2018\",\"LikeCount\":1,\"CommentCount\":0,\"ViewCount\":1}]},{\"UserID\":2,\"post\":[{\"PostId\":2,\"UserId\":2,\"UserName\":\"tejas Padia\",\"ImagePath\":\"/Files/User/user_20180606_062946997_Tulips.jpg\",\"FileId\":2109,\"FileName\":\"DiscovrUS.mov\",\"Email\":\"tejaspadia#gmail.com\",\"Location\":\"India\",\"PostDescription\":\"P7800\",\"PostPath\":\"/Files/NewsFeed/Video/2d892eaf-b6dc-433d-985b-2a4588ffd307.MOV\",\"UserRole\":\"Individual\",\"BusinessName\":\"\",\"PostType\":true,\"Type\":\"Video\",\"AdminUserId\":0,\"DisplayText\":null,\"PostCreatedDate\":\"06/08/2018\",\"LikeCount\":3,\"CommentCount\":0,\"ViewCount\":0}]}]"
Make sure json format your value invalid format
just try replace Data: to empty string "" , Your code it's working
do{
var json = "Data:[{\"UserID\":1,\"post\":[{\"PostId\":1,\"UserId\":1,\"UserName\":\"party Patel\",\"ImagePath\":\"/Files/User/user_20180606_040913967_Hydrangeas.jpg\",\"FileId\":2108,\"FileName\":\"Business Category.png\",\"Email\":\"parth.patel#shaligraminfotech.com\",\"Location\":\"Ahmedabad\",\"PostDescription\":\"P7800\",\"PostPath\":\"/Files/NewsFeed/Photo/fd1c7fcf-e1d0-4ffe-afb4-42bb3fea4fa4.PNG\",\"UserRole\":\"Business\",\"BusinessName\":\"Shaligram infotech\",\"PostType\":false,\"Type\":\"Photo\",\"AdminUserId\":0,\"DisplayText\":null,\"PostCreatedDate\":\"06/08/2018\",\"LikeCount\":4,\"CommentCount\":4,\"ViewCount\":3},{\"PostId\":3,\"UserId\":1,\"UserName\":\"party Patel\",\"ImagePath\":\"/Files/User/user_20180606_040913967_Hydrangeas.jpg\",\"FileId\":2110,\"FileName\":\"DiscovrUS.mov\",\"Email\":\"parth.patel#shaligraminfotech.com\",\"Location\":\"Ahmedabad\",\"PostDescription\":\"P7800\",\"PostPath\":\"/Files/NewsFeed/Video/ab48c228-d7b5-4dff-af56-31a0ac159a35.MOV\",\"UserRole\":\"Business\",\"BusinessName\":\"Shaligram infotech\",\"PostType\":true,\"Type\":\"Video\",\"AdminUserId\":0,\"DisplayText\":null,\"PostCreatedDate\":\"06/08/2018\",\"LikeCount\":1,\"CommentCount\":0,\"ViewCount\":1}]},{\"UserID\":2,\"post\":[{\"PostId\":2,\"UserId\":2,\"UserName\":\"tejas Padia\",\"ImagePath\":\"/Files/User/user_20180606_062946997_Tulips.jpg\",\"FileId\":2109,\"FileName\":\"DiscovrUS.mov\",\"Email\":\"tejaspadia#gmail.com\",\"Location\":\"India\",\"PostDescription\":\"P7800\",\"PostPath\":\"/Files/NewsFeed/Video/2d892eaf-b6dc-433d-985b-2a4588ffd307.MOV\",\"UserRole\":\"Individual\",\"BusinessName\":\"\",\"PostType\":true,\"Type\":\"Video\",\"AdminUserId\":0,\"DisplayText\":null,\"PostCreatedDate\":\"06/08/2018\",\"LikeCount\":3,\"CommentCount\":0,\"ViewCount\":0}]}]"
json = json.replacingOccurrences(of: "Data:", with: "")
if let data = json.data(using: .utf8) {
do {
let jsonResult = try JSONSerialization.jsonObject(with: data, options: []) as? [[String: Any]]
print(jsonResult)
} catch {
print(error.localizedDescription)
}
}
Related
After decrypting my response from API i am getting a string "name:DM100, profile:[1,2,4,5]".
How can i convert this to a json object where name is string and profile is an array
i have tried using but getting nil
if let data = testString.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print("JSON Serialization Error :-> \(error.localizedDescription)")
}
}
return nil
}
Your JSON String is not valid. It should look like this:
let testString = "{\"name\":\"DM100\", \"profile\":[1,2,4,5]}"
if let data = testString.data(using: .utf8) {
do {
if let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any] {
print(json["name"])
}
}
catch {
print(error.localizedDescription)
}
}
Start and end with curly braces {} and have double quotations around string keys and values.
You can use following code to get the output:
But String must have and valid JSON format first as follows:
let string = "{\"name\":\"DM100\", \"profile\":[1,2,4,5]}"
let data = string.data(using: .utf8)!
do {
if let jsonObj = try JSONSerialization.jsonObject(with: data, options : .allowFragments) as? Dictionary<String,Any> {
print(jsonObj)
} else {
print("JSON Error")
}
} catch let error as NSError {
print(error)
}
I try to convert JSON string to a JSON object but after JSONSerialization the output is nil in JSON.
Response String:
[{\"form_id\":3465,\"canonical_name\":\"df_SAWERQ\",\"form_name\":\"Activity 4 with Images\",\"form_desc\":null}]
I try to convert this string with my code below:
let jsonString = response.result.value
let data: Data? = jsonString?.data(using: .utf8)
let json = (try? JSONSerialization.jsonObject(with: data, options: [])) as? [String:AnyObject]
print(json ?? "Empty Data")
The problem is that you thought your jsonString is a dictionary. It's not.
It's an array of dictionaries.
In raw json strings, arrays begin with [ and dictionaries begin with {.
I used your json string with below code :
let string = "[{\"form_id\":3465,\"canonical_name\":\"df_SAWERQ\",\"form_name\":\"Activity 4 with Images\",\"form_desc\":null}]"
let data = string.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)
}
and I am getting the output :
[["form_desc": <null>, "form_name": Activity 4 with Images, "canonical_name": df_SAWERQ, "form_id": 3465]]
Using JSONSerialization always felt unSwifty and unwieldy, but it is even more so with the arrival of Codable in Swift 4. If you wield a [String:Any] in front of a simple struct it will ... hurt. Check out this in a Playground:
import Cocoa
let data = "[{\"form_id\":3465,\"canonical_name\":\"df_SAWERQ\",\"form_name\":\"Activity 4 with Images\",\"form_desc\":null}]".data(using: .utf8)!
struct Form: Codable {
let id: Int
let name: String
let description: String?
private enum CodingKeys: String, CodingKey {
case id = "form_id"
case name = "form_name"
case description = "form_desc"
}
}
do {
let f = try JSONDecoder().decode([Form].self, from: data)
print(f)
print(f[0])
} catch {
print(error)
}
With minimal effort handling this will feel a whole lot more comfortable. And you are given a lot more information if your JSON does not parse properly.
I tried the solutions here, and as? [String:AnyObject] worked for me:
do{
if let json = stringToParse.data(using: String.Encoding.utf8){
if let jsonData = try JSONSerialization.jsonObject(with: json, options: .allowFragments) as? [String:AnyObject]{
let id = jsonData["id"] as! String
...
}
}
}catch {
print(error.localizedDescription)
}
I used below code and it's working fine for me. :
let jsonText = "{\"userName\":\"Bhavsang\"}"
var dictonary:NSDictionary?
if let data = jsonText.dataUsingEncoding(NSUTF8StringEncoding) {
do {
dictonary = try NSJSONSerialization.JSONObjectWithData(data, options: [.allowFragments]) as? [String:AnyObject]
if let myDictionary = dictonary
{
print(" User name is: \(myDictionary["userName"]!)")
}
} catch let error as NSError {
print(error)
}
}
static func getJSONStringFromObject(object: Any?) -> String? {
do {
let jsonData = try JSONSerialization.data(withJSONObject: object ?? DUMMY_STRING, options: [])
return String(data: jsonData, encoding: .utf8) ?? DUMMY_STRING
} catch {
print(error.localizedDescription)
}
return DUMMY_STRING
}
I try to deseralize my JSON that look like this :
{
"access_token": "This_is_my_token"
"item01": "blabla"
"item02": "blabla"
...
}
and I want to save only access_token into a variable. Not a big deal.
For exemple, with PHP it is something really simple like:
<?php
$jsonObj = json_decode($jsonString);
$access_token = $jsonObj["access_token"];
?>
But it doesn't look this easy with Swift. I try many things but nothing works for me.
Here is the code I have:
dataString = String(data: data, encoding: .utf8)!
do {
let anyObj: AnyObject? = try JSONSerialization.jsonObject(with: dataString, options: JSONSerialization.ReadingOptions([])) as AnyObject
guard let access_token = anyObj?.firstItem as? [String: AnyObject]
else {return}
print(access_token)
} catch {
print("JSON Deserial. Error")
}
with this code, I can't manipulate anyObj like I do with $jsonObj in PHP, there is no way to do something like anyObj["access_token"]
How can I access to this item in the object ?
Thanks
You can simply call this function by passing your data here and it will return a dictionary. From that dictionary you can pick access_token value.
class func parseJsonToDictionary(data: Data) -> ([String:AnyObject]?,Error?) {
let _ = NSString(data: data, encoding:String.Encoding.utf8.rawValue)
do {
let JSONObject = try JSONSerialization.jsonObject(with: data, options: .allowFragments)
return (JSONObject as? [String:AnyObject],nil)
} catch let error as NSError {
return (nil,error)
}
}
If you are having json string and not json data then you can use this method to convert it to dictionary.
func convertToDictionary(text: String) -> [String: Any]? {
if let data = text.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
}
}
return nil
}
let str = "{\"name\":\"James\"}"
let dict = convertToDictionary(text: str)
Later you can get value of access_token from dictionary.
Instead of casting anyObj to AnyObject try casting it to a dictionary of strings like
let anyObj: AnyObject? = try JSONSerialization.jsonObject(with: dataString, options: JSONSerialization.ReadingOptions([])) as [String:String]
Then you can get accessToken by using anyObj["access_token"]
I'm trying to get the status code and put it in an if statement. This code will run in the xCode playground.
Right now status returns as ["200"] with square brackets around it. If I remove the brackets it returns as nil.
How to I return status as 200 and put it in an if statement?
import Foundation
let str = "{\"names\": [\"Bob\", \"Tim\", \"Tina\"],\"status\"[\"200\"],\"message\":\"User has been created\",\"id\":null,\"username\":\"asdf\"}"//"{\"names\": [\"Bob\", \"Tim\", \"Tina\"]}"
let data = str.data(using: String.Encoding.utf8, allowLossyConversion: false)!
do {
let json = try JSONSerialization.jsonObject(with: data, options: []) as! [String: AnyObject]
let status = json["status"] as? [String]
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
You can try this workaround:
let responseString = Optional("{\"status\":\"200\",\"message\":\"User has been created\",\"id\":null,\"username\":\"asdf\"}")
let responseData = responseString?.data(using: .utf8)
let dict: Dictionary<String, Any> = try JSONSerialization.jsonObject(with: responseData!, options: []) as! Dictionary<String, Any>
let status = dict["status"] // optional value stored with "status" key in Dictionary
It seems that actually, Swift 3 refuses to compile using:
let dict: Dictionary<String, Any> = try JSONSerialization.jsonObject(with: responseString?.data(using: .utf8)!, options: []) as! Dictionary<String, Any>
Swift 3 claims that responseString?.data(using: .utf8)! should be unwrapped although it is already.
let str = "{\"names\": [\"Bob\", \"Tim\", \"Tina\"],\"status\":[\"200\"],\"message\":\"User has been created\",\"id\":null,\"username\":\"asdf\"}"//"{\"names\": [\"Bob\", \"Tim\", \"Tina\"]}"
let data = str.data(using: .utf8)
do {
let json = try JSONSerialization.jsonObject(with: data!, options: []) as! [String: AnyObject]
let status = json["status"] as? [String]
let yourValue = status?[0]
} catch let error as NSError {
print("Failed to load: \(error.localizedDescription)")
}
I just add ( : ) after status in json formate to be invalid
I was trying to convert NSData to Json by doing this:
let jdata = getJSON("https://api.myjson.com/bins/16j2i")
do {
let json = try NSJSONSerialization.JSONObjectWithData(jdata, options: []) as! [String: AnyObject]
print(json)
} catch {
print("\(error)")
}
This is the getJSON method
func getJSON(url:String) -> NSData {
return NSData(contentsOfURL: NSURL(string: url)!)!
}
A error says that could not cast value of type '_NSCFArray' to 'NSDictionary'. Any ideas? Please
The root element of your JSON is array not dictionary (Your format looks something like [{...},{...}] ). For fixing this error you need to change the parsing code to:
let json = try NSJSONSerialization.JSONObjectWithData(jdata, options: []) as! [[String: AnyObject]]
let responseString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
let convert_array = responseString?.description
// Convert server json response to NSDictionary
do {
if let convertedJsonIntoDict = try JSONSerialization.jsonObject(with: data!, options: []) as? NSArray {
print(convertedJsonIntoDict)
}
let data = text.data(using: String.Encoding.utf8)
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String:Any]
Working Fine for Swift 3.1 & Swift 4