Here is my structure for the json file
struct DataRespons: Codable {
let data: [String]
let status: String
}
JSON file url
{
"status": "success",
"data": [
"f7c75c1f-10ab-4298-9dc9-e80b7bd07dfd",
"6f5f6eeb-191d-4ad9-b5ef-6f61fd5fcefc",
"8008800880088008",
"64a3f5d0-37c7-4c30-8d0f-3b67fb5c8fde"
]
}
This is my class for JSON requests and decoding
I use these functions to get an array of links
I hope I wrote correctly what I want to receive, and if there are any questions, please contact me
#MainActor
class NetworkModel: ObservableObject {
#Published var listId: [String] = []
var statusList = ""
var statusUser = ""
#Published var userData = UserRespons(status: "??", data: UserData(id: "???", firstName: "???", lastName: "??", age: 4, gender: "???", country: "???"))
func getList() {
guard let url = URL(string: "some URL") else { fatalError("Missing URL") }
var request = URLRequest(url: url)
request.addValue("bearer \(token)", forHTTPHeaderField: "Authorization")
let dataTask = URLSession.shared.dataTask(with: request) { (data, response, error) in
if let error = error {
print("Requst error",error)
return
}
guard let response = response as? HTTPURLResponse else { return }
if response.statusCode == 200 {
guard let data = data else { return }
DispatchQueue.main.async {
do {
let decoded = try JSONDecoder().decode(DataRespons.self, from: data)
self.listId = decoded.data
self.statusList = decoded.status
} catch let error{
print("Error decode",error)
}
}
}
}
dataTask.resume()
}
I can't through index [String] to get each element
use this code to access the data elements of an array:
// ....
self.listId = decoded.data
for i in listId.indices {
print("--> listId[\(i)] = \(listId[i]) ")
}
print("--> listId[0] = \(listId[0]) ")
print("--> listId[1] = \(listId[1]) ")
// ....
Read the very basics of Swift, specially regarding arrays here:
https://docs.swift.org/swift-book/LanguageGuide/CollectionTypes.html
Related
I want to write the data that I received from the request into an array and then display it through a list
Here is my structure for the json file
struct DataRespons: Codable {
let data: [String]
let status: String
}
struct UserRespons: Codable {
let status: String
let data: UserData
}
struct UserData: Codable, Identifiable {
let id: String
let firstName: String
let lastName: String
let age: Int
let gender: String
let country: String
}
This is my class for JSON requests and decoding
import Foundation
#MainActor
class NetworkModel: ObservableObject {
#Published var listId: [String] = []
var statusList = ""
var statusUser = ""
var temp = ""
var user: [UserData] = [] // here I am not sure if this type Array
#Published var userData = UserRespons(status: "??", data: UserData(id: "???", firstName: "???", lastName: "??", age: 4, gender: "???", country: "???"))
this func for receive a letter with links to which I should make requests
func getList() {
guard let url = URL(string: "https://opn-interview-service.nn.r.appspot.com/list") else { fatalError("Missing URL") }
var request = URLRequest(url: url)
request.addValue("bearer \(token)", forHTTPHeaderField: "Authorization")
let dataTask = URLSession.shared.dataTask(with: request) { (data, response, error) in
if let error = error {
print("Requst error",error)
return
}
guard let response = response as? HTTPURLResponse else { return }
if response.statusCode == 200 {
guard let data = data else { return }
DispatchQueue.main.async { [self] in
do {
let decoded = try JSONDecoder().decode(DataRespons.self, from: data)
self.listId = decoded.data
self.statusList = decoded.status
for i in self.listId.indices {
print("This is id[\(i)] = \(listId[i])")
getUser(url: "\(listId[i])")
// #MARK: NEED HERE HELP user.append(.init(id: <#T##String#>, firstName: <#T##String#>, lastName: <#T##String#>, age: <#T##Int#>, gender: <#T##String#>, country: <#T##String#>))
}
} catch let error{
print("Error decode",error)
}
}
}
}
dataTask.resume()
}
I want to add data that will come from requests to an empty array so that it can then be displayed in the list
function for decoding data user
func getUser(url: String) {
guard let url = URL(string: "https://opn-interview-service.nn.r.appspot.com/get/\(url)") else { fatalError("Missing URL") }
var request = URLRequest(url: url)
request.addValue("bearer \(token)", forHTTPHeaderField: "Authorization")
let dataTask = URLSession.shared.dataTask(with: request) { (data, response, error) in
if let error = error {
print("Requst error",error)
return
}
guard let response = response as? HTTPURLResponse else { return }
if response.statusCode == 200 {
guard let data = data else { return }
DispatchQueue.main.async { [self] in
do {
let decoded = try JSONDecoder().decode(UserRespons.self, from: data)
self.userData = decoded
self.statusUser = decoded.status
print("UserData: name = \(userData.data.firstName) Lastname = \(userData.data.lastName) gender = \(userData.data.gender)")
} catch let error{
print("Error decode",error)
}
}
}
}
dataTask.resume()
}
I don't know how to throw all the data into the array
First of all iterating the indices is cumbersome, replace
for i in self.listId.indices {
print("This is id[\(i)] = \(listId[i])")
getUser(url: "\(listId[i])")
}
with
for id in self.listId {
print("This is \(id)")
getUser(url: id)
}
But this is not the right place to append the user data. Do it in getUser. But first declare the array as #Published (and in plural form)
#Published var users = [UserData]()
and delete the property userData because it's not needed.
#Published var userData = UserRespons(status: "??", data: UserData(id: "???", firstName: "???", lastName: "??", age: 4, gender: "???", country: "???"))
Now replace the decoding part in getUser with
let decoded = try JSONDecoder().decode(UserRespons.self, from: data)
self.statusUser = decoded.status
users.append(decoded.data)
print("UserData: name = \(decoded.data.firstName) Lastname = \(decoded.data.lastName) gender = \(decoded.data.gender)")
I recommend to move to async/await. It's much less code and it switches to the main thread automatically.
I have this code:
struct Restaurants: Identifiable {
let name: String
let imageUrl: URL
let id: String
let rating: Double
let url: String
let category: String
static var viewModels: [Restaurants] = [
Restaurants(name: "Silverio's Mexican Kitchen", imageUrl: URL(string: "https://mainsite-prod-cdn.azureedge.net/partner-images/432257/micrositeimage_p1.jpg")!, id: "hjkhjhjh", rating: 2, url: "https://google.com"),//, category: "Mexican"),
Restaurants(name: "Taqueria La Esquinita", imageUrl: URL(string: "https://s3-media0.fl.yelpcdn.com/bphoto/x-KCQ7osmvBWLA9WpPdO_Q/o.jpg")!, id: "hjdha", rating: 3, url: "https://google.com")//, category: "Mexican")
] {
didSet {
print("data set")
}
}
}
How do I store viewModels in Firestore? I want to maintain this object structure so that I can carry it across multiple devices.
The idea of this app is to help groups find a place to eat. Therefore, I have this structure:
I am now using sub-collections for each Restaurant thanks to #FaridShumbar. How do I get documents from a sub-collection?
You need the get() method in order to retrieve documents.
Following examples from the documentation, you could retrieve your documents as follows:
db.collection("parties").getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
print("\(document.documentID) => \(document.data())")
}
}
}
This example retrieves all documents in a collection.
I did it by saving each element in the struct separately and then putting it back together when I get the document.
Save Code:
db.collection("parties").document(Utilities.code).collection("Restaurants").document(card.name).setData([
"name" : card.name,
"img" : imgUrl,
"id" : card.id,
"rating" : card.rating,
"url" : card.url,
"yes" : FieldValue.arrayUnion([Utilities.name])
], merge: true) { error in
if error != nil {
print("error adding restaurant: \(error!)")
}
}
Retrieve code:
class restaurantsFirebase: ObservableObject {
#Published var restaurants: [RestaurantListViewModel] = []
private let db = Firestore.firestore()
private var devices = Array<String>()
func fetchData() {
db.collection("parties").document(Utilities.code).addSnapshotListener { doc, error in
if error == nil {
if doc != nil && doc!.exists {
if let getDevices = doc!.get("devices") as? Array<String> {
self.devices = getDevices
}
}
}
}
db.collection("parties").document(Utilities.code).collection("Restaurants").addSnapshotListener { (querySnapshot, error) in
guard let documents = querySnapshot?.documents else {
print("no documents")
return
}
self.restaurants = documents.compactMap({ (queryDocumentSnapshot) in
print(queryDocumentSnapshot.data())
let data = queryDocumentSnapshot.data()
let name = data["name"] as? String ?? ""
let img = data["img"] as? String ?? ""
let id = data["id"] as? String ?? ""
let rating = data["rating"] as? Double ?? 0
let url = data["url"] as? String ?? ""
let yes = data["yes"] as? Array<String> ?? []
let compiled = RestaurantListViewModel(name: name, imageUrl: URL(string: img)!, id: id, rating: rating, url: url)
print("restaurant = \(compiled), restaurants = \(self.restaurants)")
print("yes = \(yes), devices = \(self.devices)")
if yes == self.devices {
// self.restaurants.append(compiled)
return compiled
}else {
return nil
}
})
}
}
}
Use:
#ObservedObject private var viewModels = restaurantsFirebase()
db.collection("parties").document(Utilities.code).addSnapshotListener { doc, error in
if error == nil {
if doc != nil && doc!.exists {
if let dev = doc!.get("devices") as? Array<String> {
print("devices = \(dev)")
devices = dev
}
if let done = doc!.get("devicesDone") as? Array<String> {
print("devicesDone = \(done), devices = \(devices)")
if done == devices {
self.viewModels.fetchData()
showFinal = true
results = false
}
}
}
}
Essentially I would like to parse the JSON received from a url and display the data inside of alert popup.
I am able to do this with a simple array below but don't know how this can be done with an JSON array from a URL.
Currently working:
let jsonObj:[String: Any] = ["error": [
"email": ["The email has already been taken."],
"phone": ["The phone has already been taken."]]
]
if let errorMsgs = jsonObj["error"] as? [String: [String]] {
let errMsg = errorMsgs.values.map { $0.reduce("", +) }.joined(separator: "\n")
print(errMsg)
self.presentAlert(withTitle: "Try again", message: errMsg)
}
JSON Array:
var structure = [Struct]()
private func fetchJSON() {
guard let url = URL(string: "url.com")
else { return }
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.httpBody = "code=\(codeValue)".data(using: .utf8)
URLSession.shared.dataTask(with: request) { data, _, error in
guard let data = data else { return }
do {
self.structure = try JSONDecoder().decode([Struct].self,from:data)
}
catch {
print(error)
}
}.resume()
}
struct Struct: Decodable {
let id: Int
let reasons: String
}
Sample JSON Array:
[
{
"id": 1,
"reasons": "Test"
},
{
"id": 3,
"reasons": "Test"
}
]
How can I get the reasons string from the array to populate in the alert similar to above.
UPDATE:
To Print the records in the alert I have done the following but it only prints one record in the alert:
for item in self.structure {
print(item.reasons)
let errMsg = [item.reasons].compactMap { $0 }.joined(separator: "\n")
self.presentAlert(withTitle: "Try again", message: errMsg)
}
Here I have created example from your code.
First of all replace your Codable with:
// MARK: - Reason
struct Reason: Codable {
let id: Int
let reasons: String
}
typealias Reasons = [Reason]
Here is your server response in JSON String formate:
let json = """
[
{
"id": 1,
"reasons": "Test"
},
{
"id": 3,
"reasons": "Test"
}
]
"""
Then I have converted it to Data only for testing purpose:
let data = json.data(using: .utf8)!
And you can parse it with
do {
self.reasonsData = try JSONDecoder().decode(Reasons.self, from:data)
for item in self.reasonsData {
print(item.reasons) //This will print reasons.
}
}
catch {
print(error)
}
UPDATE:
If you want all reasons in one string then replace
for item in self.reasonsData {
print(item.reasons)
}
with
let errMsg = self.reasonsData.compactMap { $0.reasons }.joined(separator: "\n")
I have API response with nested array . But I can't understand how can I remove whole Dict by filtering the value .
This is the response screenshot
https://imgur.com/XIDyfYX
here is the json Resonse :- https://del.dog/lofavofogo.json
I have tried this but I don't know how to get filter nested value and remove whole dict at specific index
How to remove pairs from dictionary at specific index - Swift?
I want to remove the dict where section name are "NA"
Here is the code :-
Model Class For API Response :-
class filterclass: NSObject {
var classesID : String?
var classname : String?
var section = [filterSections]()
init(json: [String: Any]) {
if let classname = json["class"] as? String {
self.classname = classname
}
if let classesID = json["classesID"] as? String {
self.classesID = classesID
}
print("classname",classname)
if let evUserGoing = json["classsection"] as? [[String: Any]] {
if self.section.count > 0
{
self.section.removeAll()
}
for evUser in evUserGoing {
// print("evUser",evUser)
let userGoing = filterSections(json: evUser)
self.section.append(userGoing)
}
for sec in section {
let section = sec.secctionname
let setionID = sec.sectionID
}
}
}
}
class filterSections: NSObject {
var sectionID : String?
var secctionname : String?
var isSelctedSection : Bool = false
init(json: [String: Any]) {
if let sectionID = json["sectionID"] as? String {
self.sectionID = sectionID
}
if let secctionname = json["section"] as? String {
self.secctionname = secctionname
}
print("sectioname",secctionname)
}
}
API POST Method TO hit API :-
func getClassSectionAPI() {
if ReusableClass.sharedInstance.isNetworkAvailable() == true
{
ReusableClass.sharedInstance.showActivityIndicator()
let UUid = LoginUserInfo.sharedInstance.uuid!
let dictionary = ["uuid":UUid,"device_id":devicetoken,"school_id":LoginUserInfo.sharedInstance.schoolId!, "user_type":LoginUserInfo.sharedInstance.usertype!]
print(dictionary)
let encoder = JSONEncoder()
if let jsonData = try? encoder.encode(dictionary) {
if let jsonString = String(data: jsonData, encoding: .utf8) {
// print(jsonString)
let cipher:String = CryptoHelper.encrypt(input:jsonString)!;
let NewEncryption = "data=\(cipher)"
print(NewEncryption)
let hmac_md5 = cipher.hmac(algorithm: .sha512, key: kHMACKey)
print("hmac",hmac_md5)
UserDefaults.standard.set(hmac_md5, forKey: Headerkey)
Singleton.sharedInstance.getWebservicesverify(params: NewEncryption, Methodname: KFilterClassSection, data: Stringnil)
{ (result) in
DispatchQueue.main.async {
ReusableClass.sharedInstance.hideActivityIndicator()
}
if result != nil
{
do {
let jsonData = try JSONSerialization.data(withJSONObject: result)
if let json = String(data: jsonData, encoding: .utf8) {
let Dict = function.convertToDictionary(text: json)! as NSDictionary
guard let data = Dict[KData] as? String
else
{
return
}
self.baseDict = data
}
}
catch {
}
guard let output = CryptoHelper.decrypt(input:self.baseDict)
else
{
return
}
print(output)
let mainDict = function.convertToDictionary(text: output)! as NSDictionary
let status = mainDict[KStatus] as! NSInteger
if(status == 1)
{
DispatchQueue.main.async {
print("Main dict",mainDict)
guard let messageArray = mainDict["data"] as? [[String: Any]] else{
return
}
if self.arrayClasSection.count > 0
{
self.arrayClasSection.removeAll()
}
print("Main dict",messageArray)
for arr in messageArray {
let obj = filterclass.init(json: arr)
if let index = self.arryFilterTemperary.index(where: { $0.classname == obj.classname }) {
// let filtered = self.arryFilterTemperary.filter { $0.classname == "NA" }
obj.section = self.arryFilterTemperary[index].section
self.arrayClasSection.append(obj)
for sec in self.arryFilterTemperary[index].section {
let section = sec.sectionID
let sectionName = sec.secctionname
self.NASection = sec.secctionname!
print(self.NASection)
self.selectedNASectionID = sec.sectionID!
// let test = self.arryFilterTemperary[index].section.filter { !$0.value.contains("") }
// print(test)
}
}
else
{
self.arrayClasSection.append(obj)
}
}
ReusableClass.sharedInstance.hideActivityIndicator()
self.tableFilter.reloadData()
}
}
I want to append the data to array but before appending I want to
filter that "NA" value dict from the array
Since this is your first question I go to some greater length in answering it than usual. Playgrounds are an exceptional way to demonstrate your problem, so you should always try to compose your questions in a form of one. I will post my answer directly from the Playground I have done.
With that out of the way lets get to the question. Your main problem seems to be that you tried an ill fated JSONSerialization "shortcutt" route. This looks cheap from the outside, but working with the unavoidable optionality of a [String:Any] comes at a high cost in a language like Swift. The way to go is the brilliant Codable protocol, at least in my opinion. Once you define your data structure properly Xcode has so much more possibilities to guide you through the APIs that writing your filter code becomes a piece of cake.
Enough of the ranting, let's get to the pizza.
import UIKit
let dataStr = """
{
"status":1,
"message":"Class and sections list",
"data":[
{
"classsection":[
{
"section":"A",
"sectionID":"1",
"classesID":"1"
},
{
"section":"B",
"sectionID":"3",
"classesID":"1"
}
],
"class":"First",
"classesID":"1"
},
{
"classsection":[
{
"section":"A",
"sectionID":"2",
"classesID":"2"
},
{
"section":"B",
"sectionID":"7",
"classesID":"2"
}
],
"class":"Second",
"classesID":"2"
},
{
"classsection":[
{
"section":"A",
"sectionID":"20",
"classesID":"15"
}
],
"class":"Third",
"classesID":"15"
},
{
"classsection":[
{
"section":"NA",
"sectionID":"33",
"classesID":"22"
}
],
"class":"Pre Nursery",
"classesID":"22"
},
{
"classsection":[
{
"section":"NA",
"sectionID":"34",
"classesID":"23"
},
{
"section":"A",
"sectionID":"35",
"classesID":"23"
},
{
"section":"B",
"sectionID":"36",
"classesID":"23"
},
{
"section":"C",
"sectionID":"37",
"classesID":"23"
}
],
"class":"Fourth four",
"classesID":"23"
},
{
"classsection":[
{
"section":"NA",
"sectionID":"38",
"classesID":"24"
}
],
"class":"Fifth",
"classesID":"24"
},
{
"classsection":[
{
"section":"NA",
"sectionID":"39",
"classesID":"25"
}
],
"class":"sixth 6th",
"classesID":"25"
}
]
}
"""
struct Section: Codable {
let section, sectionId, classesId: String
enum CodingKeys: String, CodingKey {
case sectionId = "sectionID"
case classesId = "classesID"
case section
}
}
struct Class1: Codable {
let classsection: [Section]
let clazz, classesId: String
private enum CodingKeys: String, CodingKey {
case classsection
case clazz = "class"
case classesId = "classesID"
}
}
struct Response: Codable {
let status: Int
let message: String
let data: [Class1]
func filterSections(notMatching filterVal: String) -> Response {
let filteredData = data.map { (clazz) -> Class1 in
let filteredSections = clazz.classsection.filter { (sect) -> Bool in
sect.section != filterVal
}
return Class1(classsection: filteredSections, clazz: clazz.clazz, classesId: clazz.classesId)
}
return Response(status: status, message: message, data: filteredData)
}
}
let jsonData = dataStr.data(using:.utf8)!
do {
let res = try JSONDecoder().decode(Response.self, from: jsonData)
let filteredResponse = res.filterSections(notMatching: "NA")
let encoder = JSONEncoder()
encoder.outputFormatting = .prettyPrinted
print(String(data:try encoder.encode(filteredResponse), encoding: .utf8)!)
} catch {
print(error)
}
As you can see your data structure is easily defined and the filtering code is really easy to understand once you wrap your head around the lambdas (which you should). The playground will output nicely formatted JSON as an answer, this way it is easy to check that your code does the right thing without all the messy parts of asynchronous communication (which are still nicely done in Swift).
Here's my last tipp of the day: Always try to isolate your problem as much as possible if you post a question on StackOverflow. I think your question carried too much legacy, you should whittle it down for the next one. This will improve your chances for a quick answer.
I want to turn my array into generic with my code. I'm new when it comes to generics.
Here is my code:
class APIServices {
static let youtubeBaseURL = "https://www.googleapis.com/youtube/v3/search"
static let shared = APIServices()
func fetchVideo(name: String, completionHandler: #escaping ([Item]) -> ()) {
let apiKey = "mykey"
let params = ["part": "snippet", "q": "tausiyah \(name)", "key": apiKey]
Alamofire.request(APIServices.youtubeBaseURL, method: .get, parameters: params, encoding: URLEncoding.default, headers: nil).responseData { (dataResponse) in
if let err = dataResponse.error {
print("Failed to get data:", err)
return
}
guard let data = dataResponse.data else { return }
do {
let youtubeData = try JSONDecoder().decode(YoutubeModel.self, from: data)
completionHandler(youtubeData.items)
} catch let decodeErr {
print("Failed to decode youtube data:", decodeErr)
}
}
}
}
here my YoutubeModel
struct YoutubeModel: Decodable {
var items: [Item]
}
struct Item: Decodable {
var id: VideoId
var snippet: Snippet
}
struct VideoId: Decodable {
var videoId: String
init(dictionary: [String: Any]) {
self.videoId = dictionary["videoId"] as? String ?? ""
}
}
struct Snippet: Decodable {
func encode(with aCoder: NSCoder) {
aCoder.encode(title, forKey: "titleStringKey")
}
var title: String
}
In the completionHandler: #escaping ([item]) that I want to turn into generic. How can I change completionHandler below JSONDecoder?
You can try the below generic implementation,
public class YoutubeModel<T: Decodable>: Decodable {
public var items: [T] = []
}
class APIServices {
static let youtubeBaseURL = "https://www.googleapis.com/youtube/v3/search"
static let shared = APIServices()
func fetchVideo<T: Decodable>(name: String, of type: T.Type, completionHandler: #escaping ([T]) -> ()) {
let apiKey = "mykey"
let params = ["part": "snippet", "q": "tausiyah \(name)", "key": apiKey]
Alamofire.request(APIServices.youtubeBaseURL, method: .get, parameters: params, encoding: URLEncoding.default, headers: nil).responseData { (dataResponse) in
if let err = dataResponse.error {
print("Failed to get data:", err)
return
}
guard let data = dataResponse.data else { return }
do {
let youtubeData = try JSONDecoder().decode(YoutubeModel<T>.self, from: data)
completionHandler(youtubeData.items)
} catch let decodeErr {
print("Failed to decode youtube data:", decodeErr)
}
}
}
}
Usage
APIServices.shared.fetchVideo(name: "name", of: Item.self) { list in
print(list)
}