I am trying to parse through and record json data that has an array with multiple of the same title using swift4. I have included some of the raw json data below:
{
"league": {
"alias": "MLB",
"name": "Major League Baseball",
"id": "2fa448bc-fc17-4d3d-be03-e60e080fdc26",
"date": "2018-07-07",
"games": [
{
"game": {
"id": "d9c6012e-4328-4283-9d6e-b95ff3d53106",
"status": "scheduled",
"coverage": "full",
"game_number": 1,
"day_night": "N",
"scheduled": "2018-07-07T23:15:00+00:00",
"home_team": "833a51a9-0d84-410f-bd77-da08c3e5e26e",
"away_team":
},
"game": {
"id": "d9c6012e-4328-4283-9d6e-b95ff3d53106",
"status": "scheduled",
"coverage": "full",
"game_number": 1,
"day_night": "N",
"scheduled": "2018-07-07T23:15:00+00:00",
"home_team": "833a51a9-0d84-410f-bd77-da08c3e5e26e",
"away_team":
}
}
]
};
The following code are the structs to store the json data. I am getting an error on the leagueinfo line that says does not conform to decodable but I believe the issue is from the games struct. I cannot figure out how to bring in multiple items named "game":
struct League: Decodable{
let league: LeagueInfo
init(league: LeagueInfo ){
self.league = league
}
}
struct LeagueInfo: Decodable{
let alias: String?
let name: String?
let id: String?
let date: String?
let games: Games?
}
struct Games{
let game: [Game]
}
struct Game: Decodable{
let id: String?
let status: String?
let coverage: String?
let scheduled: String?
let home_team: String?
let away_team: String?
let venue: [Venue]?
}
Any help would be greatly apreciated!
I am looking at your "games" attribute. It seems your array is not json valid. I think your array is supposed to be like this.
json = {
"games": [
{
"game": {
"id": "d9c6012e-4328-4283-9d6e-b95ff3d53106",
"status": "scheduled",
"coverage": "full",
"game_number": 1,
"day_night": "N",
"scheduled": "2018-07-07T23:15:00+00:00",
"home_team": "833a51a9-0d84-410f-bd77-da08c3e5e26e",
"away_team": ""
}
},
{
"game": {
"id": "d9c6012e-4328-4283-9d6e-b95ff3d53106",
"status": "scheduled",
"coverage": "full",
"game_number": 1,
"day_night": "N",
"scheduled": "2018-07-07T23:15:00+00:00",
"home_team": "833a51a9-0d84-410f-bd77-da08c3e5e26e",
"away_team": ""
}
}
]
};
Notice your extra curly brackets and missing commas.
Related
I have been stuck for a few days trying to decode a multidimensional JSON array from a URLSession call. This is my first project decoding JSON in SwiftUI. My attempts from reading up on methods others suggest do not seem to work.
Here is my JSON response from the server
"success": true,
"message": "Authorized",
"treeData": {
"Right": {
"G1P1": {
"Name": "John Johnson",
"ID": 387,
"SubText": "USA 2002"
},
"G2P1": {
"Name": "Tammy Johnson",
"ID": 388,
"SubText": "USA 2002"
},
"G2P2": {
"Name": "Susan Johnson",
"ID": 389,
"SubText": "USA 1955"
}
},
"Left": {
"G1P1": {
"Name": "Jane Doe",
"ID": 397,
"SubText": "USA 2002"
},
"G2P1": {
"Name": "John Doe",
"ID": 31463,
"SubText": "USA 2002"
},
"G2P2": {
"Name": "Susan Doe",
"ID": 29106,
"SubText": "USA 1958"
}
}
}
}
Here is my decode block of code
URLSession.shared.dataTask(with: request) { (data, response, error) in
guard let data = data, error == nil else {
completion(.failure(.noData))
return
}
guard let treeResponse = try? JSONDecoder().decode([String: TreeResponse].self, from: data) else {
completion(.failure(.decodingError))
return
}
dump(treeResponse)
completion(.success("Hooray"))
}.resume()
And then here are my structs, which is the part I can't seem to figure out
struct TreeResponse: Codable {
let success: Bool
let message: String
let treeData: [String:SideData]
}
struct SideData: Codable {
let personKey: [String:PersonInfo]
}
struct PersonInfo: Codable {
let Name: String
let ID: Int
let SubText: String
}
My hope is to be able to access the decoded data as treeResponse.Right.G1P1.Name
Could really use help moving past this
I will post this as an answer even if it cannot be one, but that way I can at least format it properly :-).
First of all you should learn to pose your questions in a manner that makes it as easy as possible for anyone to execute your code. Swift has a particularly helpful way of doing this, you can run a Playground on it. Then you should start whittling down your question to its essence which appears to be the JSON decode. JSONDecoder usually is very helpful in providing you with decent error messages on what it does not like about your JSON, but you have to print them. A suitable Playground would look as follows:
import UIKit
let jsonStr = """
{
"success": true,
"message": "Authorized",
"treeData": {
"Right": {
"G1P1": {
"Name": "John Johnson",
"ID": 387,
"SubText": "USA 2002"
},
"G2P1": {
"Name": "Tammy Johnson",
"ID": 388,
"SubText": "USA 2002"
},
"G2P2": {
"Name": "Susan Johnson",
"ID": 389,
"SubText": "USA 1955"
}
},
"Left": {
"G1P1": {
"Name": "Jane Doe",
"ID": 397,
"SubText": "USA 2002"
},
"G2P1": {
"Name": "John Doe",
"ID": 31463,
"SubText": "USA 2002"
},
"G2P2": {
"Name": "Susan Doe",
"ID": 29106,
"SubText": "USA 1958"
}
}
}
}
"""
struct TreeResponse: Codable {
let success: Bool
let message: String
let treeData: [String:SideData]
}
struct SideData: Codable {
let personKey: [String:PersonInfo]
}
struct PersonInfo: Codable {
let Name: String
let ID: Int
let SubText: String
}
let jsonData = jsonStr.data(using:.utf8)!
do {
let tree = try JSONDecoder().decode(TreeResponse.self, from: jsonData)
print(tree)
} catch {
print(tree)
}
This will yield a somewhat descriptive error message:
keyNotFound(CodingKeys(stringValue: "personKey", intValue: nil),
Swift.DecodingError.Context(codingPath:
[CodingKeys(stringValue: "treeData", intValue: nil),
_JSONKey(stringValue: "Right", intValue: nil)],
debugDescription: "No value associated with key
CodingKeys(stringValue: \"personKey\", intValue: nil)
(\"personKey\").", underlyingError: nil))
(Indentation mine and not particularly well thought out)
This starts pointing out your problems (of which you still seem to have a lot).
The first level of decode is somewhat ok, but the second level is woefully inadequate in its current form. There is no such thing as a personKey in your JSON which would be required to fit it into a simple struct. However you still might be able to coax it through some decode method.
Considering you JSON that appears to be a bad choice and you should opt for properly modelling your tree with the given Left and Right keys, although this is probably scratching the limit of what Decodable will do for you for free, so you will have to put in some more work to get this to work on a more involved example. If the keys on the following levels have any special significance you will have to put in a special decode there too.
In any way, you should definitely learn to formulate your questions better.
when our structure are not perfect to JSON so that's why get this types error and i've use JSONDecoder to retrieve the data from JSON couldn't read the data it's missing, though, such error yet get so needs to create quite perfect JSON models or create model with CodingKeys such like:
struct JSONData: Codable {
let success: Bool
let message: String
let treeData: TreeData
}
struct TreeData: Codable {
let treeDataRight, treeDataLeft: [String: Left]
enum CodingKeys: String, CodingKey {
case treeDataRight = "Right"
case treeDataLeft = "Left"
}
}
struct Left: Codable {
let name: String
let id: Int
let subText: String
enum CodingKeys: String, CodingKey {
case name = "Name"
case id = "ID"
case subText = "SubText"
}
}
For get JSON data to need JSONDecoder():
let jsonData = jsonStr.data(using:.utf8)!
do {
let tree = try JSONDecoder().decode(JSONData.self, from: jsonData)
dump(tree)
} catch {
print(error.localizedDescription)
}
Together with json, JSON model, JSONDecoder():
let jsonStr = """
{
"success": true,
"message": "Authorized",
"treeData": {
"Right": {
"G1P1": {
"Name": "John Johnson",
"ID": 387,
"SubText": "USA 2002"
},
"G2P1": {
"Name": "Tammy Johnson",
"ID": 388,
"SubText": "USA 2002"
},
"G2P2": {
"Name": "Susan Johnson",
"ID": 389,
"SubText": "USA 1955"
}
},
"Left": {
"G1P1": {
"Name": "Jane Doe",
"ID": 397,
"SubText": "USA 2002"
},
"G2P1": {
"Name": "John Doe",
"ID": 31463,
"SubText": "USA 2002"
},
"G2P2": {
"Name": "Susan Doe",
"ID": 29106,
"SubText": "USA 1958"
}
}
}
}
"""
struct JSONData: Codable {
let success: Bool
let message: String
let treeData: TreeData
}
struct TreeData: Codable {
let treeDataRight, treeDataLeft: [String: Left]
enum CodingKeys: String, CodingKey {
case treeDataRight = "Right"
case treeDataLeft = "Left"
}
}
struct Left: Codable {
let name: String
let id: Int
let subText: String
enum CodingKeys: String, CodingKey {
case name = "Name"
case id = "ID"
case subText = "SubText"
}
}
let jsonData = jsonStr.data(using:.utf8)!
do {
let tree = try JSONDecoder().decode(JSONData.self, from: jsonData)
dump(tree)
} catch {
print(error.localizedDescription)
}
Result:
Result here
and i hope this would work and helpfully so try once
I have called an API to get all holidays in a year, it came out a Json type. But I only can extract it like below (it is one of many elements of "items")
"items": [
{
"kind": "calendar#event",
"etag": "\"3235567993214000\"",
"id": "20200101_1814eggq09ims8ge9pine82pclgn49rj41262u9a00oe83po05002i01",
"status": "confirmed",
"htmlLink": "https://www.google.com/calendar/event?eid=MjAyMDAxMDFfMTgxNGVnZ3EwOWltczhnZTlwaW5lODJwY2xnbjQ5cmo0MTI2MnU5YTAwb2U4M3BvMDUwMDJpMDEgZW4udWsjaG9saWRheUB2",
"created": "2021-04-07T08:26:36.000Z",
"updated": "2021-04-07T08:26:36.607Z",
"summary": "New Year's Day",
"creator": {
"email": "en.uk#holiday#group.v.calendar.google.com",
"displayName": "Holidays in United Kingdom",
"self": true
},
"organizer": {
"email": "en.uk#holiday#group.v.calendar.google.com",
"displayName": "Holidays in United Kingdom",
"self": true
},
"start": {
"date": "2020-01-01"
},
"end": {
"date": "2020-01-02"
},
"transparency": "transparent",
"visibility": "public",
"iCalUID": "20200101_1814eggq09ims8ge9pine82pclgn49rj41262u9a00oe83po05002i01#google.com",
"sequence": 0,
"eventType": "default"
},
{
"kind": "calendar#event",
"etag": "\"3235567993214000\"",
"id": "20200412_1814eggq09ims8gd8lgn6t35e8g56tbechgniag063i0ue048064g0g",
"status": "confirmed",
"htmlLink": "https://www.google.com/calendar/event?eid=MjAyMDA0MTJfMTgxNGVnZ3EwOWltczhnZDhsZ242dDM1ZThnNTZ0YmVjaGduaWFnMDYzaTB1ZTA0ODA2NGcwZyBlbi51ayNob2xpZGF5QHY",
"created": "2021-04-07T08:26:36.000Z",
"updated": "2021-04-07T08:26:36.607Z",
"summary": "Easter Sunday",
"creator": {
"email": "en.uk#holiday#group.v.calendar.google.com",
"displayName": "Holidays in United Kingdom",
"self": true
},
"organizer": {
"email": "en.uk#holiday#group.v.calendar.google.com",
"displayName": "Holidays in United Kingdom",
"self": true
},
"start": {
"date": "2020-04-12"
},
"end": {
"date": "2020-04-13"
},
"transparency": "transparent",
"visibility": "public",
"iCalUID": "20200412_1814eggq09ims8gd8lgn6t35e8g56tbechgniag063i0ue048064g0g#google.com",
"sequence": 0,
"eventType": "default"
}
I try to get the value in key "start" and key "summary" but I can't.
Xcode told me that "items" is a __NSArrayI type.
What I've tried so far is create a class simple like this (just use to try first, so I didn't make all variable)
class API_Info {
var kind: String?
var etag: String?
var id: String?
var status: String?
var htmlLink: String?
var created: String?
var updated: String?
var summary: String?
init(items: [String:Any]){
self.kind = items["kind"] as? String
self.etag = items["etag"] as? String
self.id = items["id"] as? String
self.status = items["status"] as? String
self.htmlLink = items["htmlLink"] as? String
self.created = items["created"] as? String
self.updated = items["updated"] as? String
self.summary = items["summary"] as? String
}
}
And I parse like this:
guard let items = json!["items"]! as? [API_Info] else{
print("null")
return
}
In this way, else statement was run.
What am I doing wrong, and how can I get the data I want?
Thanks in advance.
Codable is the solution here. Below is the struct I used rather than your class
struct ApiInfo: Codable {
let kind: String
let etag: String
let id: String
let status: String
let htmlLink: String
let created: Date
let updated: Date
let summary: String
}
Then I created a root type to hold the array
struct Result: Codable {
let items: [ApiInfo]
}
And then the decoding
let formatter = DateFormatter()
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
let decoder = JSONDecoder()
decoder.dateDecodingStrategy = .formatted(formatter)
do {
let result = try decoder.decode(Result.self, from: data)
print(result.items)
} catch {
print(error)
}
Notice that the data values are decoded to Date objects.
Optionally you can skip the root type and decode as a dictionary
do {
let items = try decoder.decode([String: [ApiInfo]].self, from: data)
if let values = items["items"] {
print(values)
}
} catch {
print(error)
}
hi Guys
i try to learn swift, i need your help
i try to connect json with swift i get errors
Cannot convert value of type '[Surah]' to expected argument type 'Range'
thank you vor the help
struct Surah: Codable {
struct Juz: Codable {
let index: String
let verse: Verse
}
struct Verse: Codable {
let start, end: String
}
enum Place: String, Codable {
case mecca = "Mecca"
case medina = "Medina"
}
enum TypeEnum: String, Codable {
case madaniyah = "Madaniyah"
case makkiyah = "Makkiyah"
}
let place: Place
let type: TypeEnum
let count: Int
let title, titleAr, index, pages: String
let juz: [Juz] }
/***************/
struct ContentView: View {
let surahs: [Surah] = Bundle.main.decode("source/surah.json")
var body: some View {
NavigationView{
List{
ForEach(surahs){section in
Section(header:Text(section.title)){
ForEach(section.juz, id: \.verse){juzs in
Text(juzs.verse.start)
}
}
}
}
}
}
}
JSON:
[{
"place": "Mecca",
"type": "Makkiyah",
"count": 7,
"title": "Al-Fatiha",
"titleAr":"الفاتحة",
"index": "001",
"pages": "1",
"juz": [
{
"index": "01",
"verse": {
"start": "verse_1",
"end": "verse_7"
}
}
]
},
{
"place": "Medina",
"type": "Madaniyah",
"count": 286,
"title": "Al-Baqara",
"titleAr":"البقرة",
"index": "002",
"pages": "2",
"juz": [
{
"index": "01",
"verse": {
"start": "verse_1",
"end": "verse_141"
}
},
{
"index": "02",
"verse": {
"start": "verse_142",
"end": "verse_252"
}
},
{
"index": "03",
"verse": {
"start": "verse_253",
"end": "verse_286"
}
}
]
}]
I'm trying to create forEach method for horizontal collection for properties
how can i call this part of json??
I hope someone can help me..
now i need to call second Json part in my Swift
{
"index": "001",
"name": "al-Fatihah",
"verse": {
"verse_1": "بِسْمِ ٱللَّهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ",
"verse_2": "ٱلْحَمْدُ لِلَّهِ رَبِّ ٱلْعَٰلَمِينَ",
"verse_3": "ٱلرَّحْمَٰنِ ٱلرَّحِيمِ",
"verse_4": "مَٰلِكِ يَوْمِ ٱلدِّينِ",
"verse_5": "إِيَّاكَ نَعْبُدُ وَإِيَّاكَ نَسْتَعِينُ",
"verse_6": "ٱهْدِنَا ٱلصِّرَٰطَ ٱلْمُسْتَقِيمَ",
"verse_7": "صِرَٰطَ ٱلَّذِينَ أَنْعَمْتَ عَلَيْهِمْ غَيْرِ ٱلْمَغْضُوبِ عَلَيْهِمْ وَلَا ٱلضَّآلِّينَ"
},
"count": 7,
"juz": [
{
"index": "01",
"verse": {
"start": "verse_1",
"end": "verse_7"
}
}
]
}
how can I call it up and code it? or formatting
struct ContentView: View {
let surahs: [Surah] = Bundle.main.decode("source/surah.json")
var body: some View {
NavigationView{
List{
ForEach(surahs, id:\. index){section in
Section(header:Text(section.title)){
ForEach(section.juz, id: \.verse){juzs in
Text(juzs.verse.start)
}
}
}
}
}
}
I am writing an IOS Application that need to read a JSON FIle.
I understood the best way to do that is to write a struct for that json file and parse the json into that struct to be able to use freely.
I have a Json file that is saved locally in one of the folders
{
"colors": [
{
"color": "black",
"category": "hue",
"type": "primary",
"code": {
"rgba": [255,255,255,1],
"hex": "#000"
}
},
{
"color": "white",
"category": "value",
"code": {
"rgba": [0,0,0,1],
"hex": "#FFF"
}
},
{
"color": "red",
"category": "hue",
"type": "primary",
"code": {
"rgba": [255,0,0,1],
"hex": "#FF0"
}
},
{
"color": "blue",
"category": "hue",
"type": "primary",
"code": {
"rgba": [0,0,255,1],
"hex": "#00F"
}
},
{
"color": "yellow",
"category": "hue",
"type": "primary",
"code": {
"rgba": [255,255,0,1],
"hex": "#FF0"
}
},
{
"color": "green",
"category": "hue",
"type": "secondary",
"code": {
"rgba": [0,255,0,1],
"hex": "#0F0"
}
},
],
"people": [
{
"first_name": "john",
"is_valid": true,
"friends_list": {
"friend_names": ["black", "hub", "good"],
"age": 13
}
},
{
"first_name": "michal",
"is_valid": true,
"friends_list": {
"friend_names": ["jessy", "lyn", "good"],
"age": 19
}
},
{
"first_name": "sandy",
"is_valid": false,
"friends_list": {
"friend_names": ["brown", "hub", "good"],
"age": 15
}
},
]
}
i created a struct for each one of the two tables:
import Foundation
struct Color {
var color: String
var category: String
var type: String
var code: [JsonCodeStruct]
}
struct Poeople {
var firsName: String
var is_valid: Bool
var friendsNames: [JsonFriendNames]
}
struct JsonFriendNames {
var friendNames: [String]
var age: String
}
struct JsonCodeStruct {
var rgba: [Double]
var hex: String
}
and I want to open the local json file
and assign it the structs that I gave and then read them easily in the code.
can you suggest me a way on how to do that?
First of all you need an umbrella struct to decode the colors and people keys
struct Root: Decodable {
let colors: [Color]
let people : [Person]
}
The types in your structs are partially wrong. The Color related structs are
struct Color: Decodable {
let color: String
let category: String
let type: String?
let code : ColorCode
}
struct ColorCode: Decodable {
let rgba : [UInt8]
let hex : String
}
and the Person related structs are
struct Person: Decodable {
let firstName : String
let isValid : Bool
let friendsList : Friends
}
struct Friends: Decodable {
let friendNames : [String]
let age : Int
}
Assuming you read the file with
let data = try Data(contentsOf: URL(fileURLWithPath:"/...."))
you can decode the JSON into the given structs with
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
do {
let result = try decoder.decode(Root.self, from: data)
print(result)
} catch { print(error) }
I need help with parsing JSON from server. Here's the JSON:
{
"response": {
"items": [
{
"type": "post",
"source_id": -17507435,
"date": 1514538602,
"post_id": 4105,
"post_type": "post",
"text": "Some text here",
"marked_as_ads": 0,
"attachments": [
{
"type": "photo",
"photo": {
"id": 456239655,
"album_id": -7,
"owner_id": -17507435,
"user_id": 100,
"photo_75": "https://sun1-3.userapi.com/c840632/v840632924/3b7e7/4YUS7DlaLK8.jpg",
"photo_130": "https://sun1-3.userapi.com/c840632/v840632924/3b7e8/Ffpb4ZUlulI.jpg",
"photo_604": "https://sun1-3.userapi.com/c840632/v840632924/3b7e9/-pkl6Qdb9hk.jpg",
"width": 439,
"height": 312,
"text": "",
"date": 1514538602,
"post_id": 4105,
"access_key": "6a61a49570efd9c39c"
}
}
],
"post_source": {
"type": "api"
},
"comments": {
"count": 0,
"groups_can_post": true,
"can_post": 1
},
"likes": {
"count": 0,
"user_likes": 0,
"can_like": 1,
"can_publish": 1
},
"reposts": {
"count": 0,
"user_reposted": 0
},
"views": {
"count": 2
}
}
],
"profiles": [],
"groups": [
{
"id": 17507435,
"name": "Literature Museum",
"screen_name": "samlitmus",
"is_closed": 0,
"type": "group",
"is_admin": 0,
"is_member": 1,
"photo_50": "https://pp.userapi.com/c615722/v615722068/e58c/d5Y8E_5689s.jpg",
"photo_100": "https://pp.userapi.com/c615722/v615722068/e58b/Hm05ga3x2J8.jpg",
"photo_200": "https://pp.userapi.com/c615722/v615722068/e589/yoG_DDalFII.jpg"
},
{
"id": 27711883,
"name": "E:\\music\\melodic hardcore",
"screen_name": "e_melodic_hc",
"is_closed": 0,
"type": "page",
"is_admin": 0,
"is_member": 1,
"photo_50": "https://pp.userapi.com/c628220/v628220426/47092/xepNnC7pSBw.jpg",
"photo_100": "https://pp.userapi.com/c628220/v628220426/47091/uAokr-c3NQ8.jpg",
"photo_200": "https://pp.userapi.com/c628220/v628220426/4708f/eNY4vzooz4E.jpg"
},
{
"id": 81574241,
"name": "DOS4GW.EXE",
"screen_name": "dos4gw",
"is_closed": 0,
"type": "page",
"is_admin": 0,
"is_member": 1,
"photo_50": "https://pp.userapi.com/c622118/v622118651/e045/vlhV6QxtoLI.jpg",
"photo_100": "https://pp.userapi.com/c622118/v622118651/e044/P9mVUhXBV58.jpg",
"photo_200": "https://pp.userapi.com/c622118/v622118651/e043/Soq8oxCMB0I.jpg"
},
{
"id": 76709587,
"name": "Prosvet",
"screen_name": "prosvet_pub",
"is_closed": 0,
"type": "page",
"is_admin": 0,
"is_member": 0,
"photo_50": "https://pp.userapi.com/c630431/v630431500/b24a/GHox8AmDTXU.jpg",
"photo_100": "https://pp.userapi.com/c630431/v630431500/b249/H3mcC-K7htM.jpg",
"photo_200": "https://pp.userapi.com/c630431/v630431500/b248/9fyvB8gkcwc.jpg"
}
],
"next_from": "1/4105_1514494800_5"
}
}
What I need to get from this JSON are lines: "text", "comments", "likes", "reposts", "attachments".
Inside "attachments" field I want to get "photo_604" line.
Here's my code:
class NewsItems: Decodable {
var text: String?
var comments: Comments
var likes: Likes
var reposts: Reposts
var attachments: [Attachments]
}
class Comments: Decodable {
var count: Int?
}
class Likes: Decodable {
var count: Int?
}
class Reposts: Decodable {
var count: Int?
}
class Attachments: Decodable {
var attachments: AttachmentPhoto
}
class AttachmentPhoto: Decodable {
var photo: WhatIsInsideAttachmentsPhoto
}
class WhatIsInsideAttachmentsPhoto: Decodable {
var photo: String?
enum CodingKeys: String, CodingKey {
case photo = "photo_604"
}
}
class WhatIsIsideResponseNewsFeed: Decodable {
var items: [NewsItems]
}
public class ResponseNewsFeed: Decodable {
var response: WhatIsIsideResponseNewsFeed
}
But after making the request:
Alamofire.request(baseURL+methodName, parameters: parameters).responseData(completionHandler: { response in
if let result = response.result.value {
let decoder = JSONDecoder()
let myResponse = try! decoder.decode(ResponseNewsFeed.self, from: result)
completion(myResponse.response.items)
I get an error:
Fatal error: 'try!' expression unexpectedly raised an error:
Swift.DecodingError.keyNotFound(_UL_PetrovLeonid.NewsItems.(CodingKeys
in _FA9A2FC8130449AA328C19ACD9506C2D).attachments,
Swift.DecodingError.Context(codingPath:
[_UL_Leonid.ResponseNewsFeed.(CodingKeys in
_FA9A2FC8130449AA328C19ACD9506C2D).response, _UL_PetrovLeonid.WhatIsIsideResponseNewsFeed.(CodingKeys in _FA9A2FC8130449AA328C19ACD9506C2D).items, Foundation.(_JSONKey in _12768CA107A31EF2DCE034FD75B541C9)(stringValue: "Index 0", intValue: Optional(0))], debugDescription: "No value associated with key
attachments (\"attachments\").", underlyingError: nil))
Why is that happening and what do I need to do to solve it? I've been into coding only three months from now, so please forgive me beforehand if my problem seems silly.
Thank you.
The error message is very clear
... Swift.DecodingError.keyNotFound ... NewsItems.(CodingKeys in _FA9A2FC8130449AA328C19ACD9506C2D).attachments ... No value associated with key attachments (\"attachments\").
keyNotFound is key is missing
NewsItems.(CodingKeys ... ).attachments is the object for key attachments in NewsItems which is Attachments
No value associated with key attachments (\"attachments\") is what is says.
Shortly: There is no key attachments in Attachments which is true.
Look at your JSON
"attachments": [
{
"type": "photo",
"photo": {
The class equivalent is
class Attachments: Decodable {
let type : String
let photo : AttachmentPhoto
}
And AttachmentPhoto is supposed to be
class AttachmentPhoto: Decodable {
private enum CodingKeys : String, CodingKey {
case photo604 = "photo_604"
case id
}
let id : Int
let photo604 : String // or even URL
// etc.
}
Actually there is no need to use classes, in most cases a struct is sufficient.