I am new in Swift and SwiftUI. I need to send a POST request to the server when a button is clicked. The request is sent, everything is fine.
ShareHelper.swift:
import Foundation
class ShareHelper {
var dataString: String = ""
var newsMessage: String
var newsUser: String
var newsEmail: String
var newsMedia: String
let newsAPI: String = "https://example.com/api/shareNews"
init(message: String, user: String, email: String, media: String) {
self.newsMessage = message
self.newsUser = user
self.newsEmail = email
self.newsMedia = media
self.RequestPost()
}
func RequestPost() {
let url = URL(string: self.newsAPI)
guard let requestUrl = url else { fatalError() }
var request = URLRequest(url: requestUrl)
request.httpMethod = "POST"
let postString = "message=\(self.newsMessage)&user=\(self.newsUser)&email=\(self.newsEmail)&media=\(self.newsMedia)"
request.httpBody = postString.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if error != nil {
return
}
if let data = data, let dataString = String(data: data, encoding: .utf8) {
self.dataString = dataString
}
}
task.resume()
}
}
Button from ContentView.swift
Button(action: {
let shareHelper = ShareHelper(message: self.textAreaText, user: self.inputUser, email: self.inputEmail, media: self.inputMedia)
shareHelper.RequestPost()
print("Share helper: \(shareHelper.dataString)")
}, label: {
Text("Send")
})
How to make a message appear in the console if POST request successful sending?
You need to use completion block.
func RequestPost(completion: #escaping((String) -> Void)) {
let url = URL(string: self.newsAPI)
guard let requestUrl = url else { fatalError() }
var request = URLRequest(url: requestUrl)
request.httpMethod = "POST"
let postString = "message=\(self.newsMessage)&user=\(self.newsUser)&email=\(self.newsEmail)&media=\(self.newsMedia)"
request.httpBody = postString.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if error != nil {
return
}
if let data = data, let dataString = String(data: data, encoding: .utf8) {
DispatchQueue.main.async {
self.dataString = dataString
completion(dataString)
}
}
}
task.resume()
}
And on button
Button(action: {
let shareHelper = ShareHelper(message: "self.textAreaText", user: "self.inputUser", email: "self.inputEmail", media: "self.inputMedia")
shareHelper.RequestPost { (dataString) in
print("Share helper: \(shareHelper.dataString)")
// Or
print("Share helper: \(dataString)")
}
}, label: {
Text("Send")
})
Related
So I'm practising trying to make API calls with Swift. The code is as below:
struct Example: Codable {
let userID: String
let ID: String
let title: String
let completed: String
}
func getJson(completion: #escaping (Example)-> ()) {
let urlString = "https://jsonplaceholder.typicode.com/todos/1"
if let url = URL(string: urlString) {
URLSession.shared.dataTask(with: url) {data, res, err in
if let data = data {
let decoder = JSONDecoder()
if let json: Example = try? decoder.decode(Example.self, from: data) {
completion(json)
}
}
}.resume()
}
}
getJson() { (json) in
print(json.ID)
}
However, I am unable to print out anything when getJson is called.
The example API I used is found here.
The tutorial that I used to help me write the code is found here.
Modified your variable name and data type exactly as your API response.
struct Example: Codable {
let userId: Int
let id: Int
let title: String
let completed: Bool
}
func getJson(completion: #escaping (Example)-> ()) {
let urlString = "https://jsonplaceholder.typicode.com/todos/1"
if let url = URL(string: urlString) {
URLSession.shared.dataTask(with: url) {data, res, err in
if let data = data {
let decoder = JSONDecoder()
do {
let json: Example = try! decoder.decode(Example.self, from: data)
completion(json)
}catch let error {
print(error.localizedDescription)
}
}
}.resume()
}
}
getJson() { (json) in
print(json.id)
}
You can also use CodingKey and can change your response during the init period.
struct Example: Codable {
var userID: Int
var ID: Int
var title: String
var completed: Bool
enum CodingKeys: String, CodingKey {
case userID = "userId"
case ID = "id"
case title = "title"
case completed = "completed"
}
init(from decoder: Decoder) throws {
let values = try decoder.container(keyedBy: CodingKeys.self)
userID = try values.decode(Int.self, forKey: .userID)
ID = try values.decode(Int.self, forKey: .ID)
title = try values.decode(String.self, forKey: .title)
completed = try values.decode(Bool.self, forKey: .completed)
title = "Title: \(title)"
}
}
func getJson(completion: #escaping (Example)-> ()) {
let urlString = "https://jsonplaceholder.typicode.com/todos/1"
if let url = URL(string: urlString) {
URLSession.shared.dataTask(with: url) {data, res, err in
if let data = data {
do {
let json: Example = try JSONDecoder().decode(Example.self, from: data)
completion(json)
}catch let error {
print(error.localizedDescription)
}
}
}.resume()
}
}
getJson() { (json) in
print("ID: \(json.ID) \(json.title)")
}
import UIKit
class ApiManager: NSObject {
static func postApiRequest(url: String,parameters:[String: Any],completion: #escaping([String: Any])-> Void) {
let session = URLSession.shared
let request = NSMutableURLRequest(url: NSURL(string: url)! as URL)
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
do{
request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: JSONSerialization.WritingOptions())
let task = session.dataTask(with: request as URLRequest as URLRequest, completionHandler: {(data, response, error) in
if let response = response {
let nsHTTPResponse = response as! HTTPURLResponse
let statusCode = nsHTTPResponse.statusCode
print ("status code = \(statusCode)")
}
if let error = error {
print ("\(error)")
}
if let data = data {
do{
let jsonResponse = try JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions())
print ("data = \(jsonResponse)")
}catch _ {
print ("OOps not good JSON formatted response")
}
}
})
task.resume()
}catch _ {
print ("Oops something happened buddy")
}
}
}
I am trying to upload pictures(with FTP way) by REST Service. So I have a function like below:
func saveFeedBack(feedbackType: String, feedbackText: String, picture1: Data, picture2: Data, picture3: Data)
{
let parameters = [
"ofeedbackType": feedbackType,
"ofeedbackText": feedbackText
]
let oimage1 = UIImage(data: picture1)
let oimage2 = UIImage(data: picture2)
let oimage3 = UIImage(data: picture3)
guard let mediaImage1 = Media(withImage: oimage1!, forKey: "pic1") else { return }
guard let mediaImage2 = Media(withImage: oimage2!, forKey: "pic2") else { return }
guard let mediaImage3 = Media(withImage: oimage3!, forKey: "pic3") else { return }
guard let url = URL(string: "http://abc.def.com/Mobile/SSS/feedback") else { return }
var request = URLRequest(url: url)
request.httpMethod = "POST"
let boundary = generateBoundary()
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
let dataBody = createDataBody(withParameters: parameters, media: [mediaImage1, mediaImage2, mediaImage3], boundary: boundary)
request.httpBody = dataBody
let session = URLSession.shared
session.dataTask(with: request) { (data, response, error) in
if let response = response {
print(response)
}
if let data = data
{
do
{
if let jsonResult = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any]
{
//some code in here
}
}
catch
{
print(error)
}
}
}.resume()
}
Here is the Media struct:
import UIKit
struct Media {
let key: String
let filename: String
let data: Data
let mimeType: String
init?(withImage image: UIImage, forKey key: String) {
self.key = key
self.mimeType = "image/jpeg"
self.filename = "fotograf.jpg"
guard let data = image.jpegData(compressionQuality: 1) else { return nil }
self.data = data
}
}
Let's talk about this scenario: Let's say I am sending picture 1 and picture 2. But I am not sending picture 3. Of course I am getting below error because of this code: guard let mediaImage3 = Media(withImage: oimage3!, forKey: "pic3") else { return }
Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value
How can I get rid of above problem? Pictures should be optional. I mean: functions should work fine if I don't send any picture.
Here is the CreateDataBody function
func createDataBody(withParameters params: Parameters?, media: [Media]?, boundary: String) -> Data {
let lineBreak = "\r\n"
var body = Data()
if let parameters = params {
for (key, value) in parameters {
body.append("--\(boundary + lineBreak)")
body.append("Content-Disposition: form-data; name=\"\(key)\"\(lineBreak + lineBreak)")
body.append("\(value + lineBreak)")
}
}
if let media = media {
for photo in media {
body.append("--\(boundary + lineBreak)")
body.append("Content-Disposition: form-data; name=\"\(photo.key)\"; filename=\"\(photo.filename)\"\(lineBreak)")
body.append("Content-Type: \(photo.mimeType + lineBreak + lineBreak)")
body.append(photo.data)
body.append(lineBreak)
}
}
body.append("--\(boundary)--\(lineBreak)")
return body
}
Can you try this?
import UIKit
struct Media {
let key: String
let filename: String
let data: Data?
let mimeType: String
init?(withImage image: UIImage, forKey key: String) {
self.key = key
self.mimeType = "image/jpeg"
self.filename = "photo.jpg"
self.data = image.jpegData(compressionQuality: 1)
}
}
func createDataBody(withParameters params: Parameters?, media: [Media]?, boundary: String) -> Data {
let lineBreak = "\r\n"
var body = Data()
if let parameters = params {
for (key, value) in parameters {
body.append("--\(boundary + lineBreak)")
body.append("Content-Disposition: form-data; name=\"\(key)\"\(lineBreak + lineBreak)")
body.append("\(value + lineBreak)")
}
}
if media != nil {
print("media cnt: ", media!.count)
if let media = media {
for photo in media {
body.append("--\(boundary + lineBreak)")
body.append("Content-Disposition: form-data; name=\"\(photo.key)\"; filename=\"\(photo.filename)\"\(lineBreak)")
body.append("Content-Type: \(photo.mimeType + lineBreak + lineBreak)")
body.append(photo.data!)
body.append(lineBreak)
print("photo.key", photo.key)
}
}
}
body.append("--\(boundary)--\(lineBreak)")
return body
}
func saveFeedBack(feedbackType: String, feedbackText: String, picture1: Data, picture2: Data, picture3: Data)
{
var imageList : [Media] = []
let parameters = [
"ofeedbackType": feedbackType,
"ofeedbackText": feedbackText
]
if let img1 = UIImage(data: picture1) {
if img1.size.width > 0 {
if let oImg1 = Media(withImage: img1, forKey: "pic1") {
imageListe.append(oImg1)
}
}
}
if let img2 = UIImage(data: picture2) {
if img2.size.width > 0 {
if let oImg2 = Media(withImage: img2, forKey: "pic2") {
imageListe.append(oImg2)
}
}
}
if let img3 = UIImage(data: picture3) {
if img3.size.width > 0 {
if let oImg3 = Media(withImage: img3, forKey: "pic3") {
imageListe.append(oImg3)
}
}
}
guard let url = URL(string: "http://abc.des.com/Test/SSS/feedback") else { return }
var request = URLRequest(url: url)
request.httpMethod = "POST"
let boundary = generateBoundary()
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
let dataBody = createDataBody(withParameters: parameters, media:imageList , boundary: boundary)
request.httpBody = dataBody
let session = URLSession.shared
session.dataTask(with: request) { (data, response, error) in
if let response = response {
print(response)
}
if let data = data
{
do
{
if let jsonResult = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any]
{
//some code in here
}
}
catch
{
print(error)
}
}
}.resume()
}
Just try with that hopefully this will work. I have made some changes.
Model:
struct Media {
let key: String
let filename: String
let data: Data
let mimeType: String
init?(withImage image: UIImage, forKey key: String) {
self.key = key
self.mimeType = "image/jpeg"
self.filename = "fotograf.jpg"
guard let data = image.jpegData(compressionQuality: 1) else { return nil }
self.data = data
}
}
Code:
func saveFeedBack(feedbackType: String, feedbackText: String, picture1: Data, picture2: Data, picture3: Data)
{
let parameters = [
"ofeedbackType": feedbackType,
"ofeedbackText": feedbackText
]
guard let oimage1 = UIImage(data: picture1) else { return }
guard let oimage2 = UIImage(data: picture2) else { return }
guard let oimage3 = UIImage(data: picture3) else { return }
let mediaImage1 = Media(withImage: oimage1, forKey: "pic1")
let mediaImage2 = Media(withImage: oimage2, forKey: "pic2")
let mediaImage3 = Media(withImage: oimage3, forKey: "pic3")
guard let url = URL(string: "http://abc.def.com/Mobile/SSS/feedback") else { return }
var request = URLRequest(url: url)
request.httpMethod = "POST"
let boundary = generateBoundary()
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
let dataBody = createDataBody(withParameters: parameters, media: [mediaImage1, mediaImage2, mediaImage3], boundary: boundary)
request.httpBody = dataBody
let session = URLSession.shared
session.dataTask(with: request) { (data, response, error) in
if let response = response {
print(response)
}
if let data = data
{
do
{
if let jsonResult = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any]
{
//some code in here
}
}
catch
{
print(error)
}
}
}.resume()
}
I load my json info from my server as follows, but when I click away to a different page too soon, the request keeps trying in the background and there is a warning that the viewController can't be found anymore. How would I cancel all requests onViewDisappear?
if let requestURL = URL(string: "https://www.example.com/file.php") {
var urlRequest = URLRequest(url: requestURL)
urlRequest.httpMethod = "POST"
let postString = "email=\(loginUsername.text!)"
urlRequest.httpBody = postString.data(using: .utf8)
let session = URLSession.shared
let task = session.dataTask(with: urlRequest as URLRequest) { (data, response, error) in
if let data = data {
do {
if let jsonResult = try JSONSerialization.jsonObject(with: data, options: []) as? [String:Any] {
// Async Stuff
DispatchQueue.main.async{
// do things
}
DispatchQueue.main.async(execute: {
})
}
} catch {
print("Error: \(error)")
}
}
}
task.resume()
}
Save your requests somewhere and then on moving away from the controller call:
task.cancel()
class DataCall {
var task: URLSessionDataTask?
func load() {
guard let requestURL = URL(string: "https://www.example.com/file.php") else { return }
var urlRequest = URLRequest(url: requestURL)
urlRequest.httpMethod = "POST"
let postString = "email=\(loginUsername.text!)"
urlRequest.httpBody = postString.data(using: .utf8)
let session = URLSession.shared
task = session.dataTask(with: urlRequest as URLRequest) { (data, response, error) in
if let data = data {
do {
if let jsonResult = try JSONSerialization.jsonObject(with: data, options: []) as? [String:Any] {
// Async Stuff
DispatchQueue.main.async{
// do things
}
}
} catch {
print("Error: \(error)")
}
}
}
task.resume()
}
func stopTask() {
task.cancel()
}
}
Then in your viewWillDissapear you call dataCall.stopTask().
Hi i am new to IOS App developement.
My code is
func sendRequest<T: Decodable>(api: String, parameters: [String: String]? = nil, outputBlock: #escaping (T) -> () ) {
guard let url = URL(string: "http://xxyyzz.com/appRegister.php") else {return}
print("hitting : -", url.absoluteString)
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let newparam = ["name": "rr", "pass": "123456", "email": "rr#rr.com", "passConfirm":"123456"]
let httpBody = try? JSONSerialization.data(withJSONObject: newparam)
request.httpBody = httpBody
if let data = request.httpBody, let str = String(data: data, encoding: String.Encoding.utf8) {
print(str)
}
URLSession.shared.dataTask(with: request as URLRequest) { (data, response, error) in
DispatchQueue.main.async {
Indicator.shared.hideProgressView()
if let err = error {
print(err.localizedDescription)
return
}
guard let data = data else {return}
do {
let obj = String(data: data, encoding: String.Encoding.utf8)
print(obj ?? "oberrrrr")
}
}
}.resume()
}
and console printed result as per code is below
hitting : - http://xxyyzz.com/appRegister.php
{"email":"rr#rr.com","passConfirm":"123456","name":"rr","pass":"123456"}
{"error":"Please enter all fields."}
url and parameters works well on postman that means their is something missing in my code.
just to answer the problem if anyone else faces this.
this code is fine but the problem was with php web-service as the backend developer was not accepting json values as parameter instead form data was need to send.
So, two types of fix can be made here
accept json at backend by adding :-
$postdata = file_get_contents("php://input");
$request = json_decode($postdata, true);
send form data instead json
func sendRequest<T: Decodable>(api: String, parameters: [String: Any]? = nil, outputBlock: #escaping (T) -> () ) {
guard let url = URL(string: api) else {return}
print("hitting : -", url.absoluteString)
var request = URLRequest(url: url)
if let parameters = parameters {
request.httpMethod = "POST"
var postArr = [String]()
for(key, value) in parameters
{
postArr.append(key + "=\(value)")
}
let postString = postArr.map { String($0) }.joined(separator: "&")
request.httpBody = postString.data(using: .utf8)
if let data = request.httpBody, let str = String(data: data, encoding: String.Encoding.utf8) {
print(str)
}
}
URLSession.shared.dataTask(with: request) { (data, response, error) in
DispatchQueue.main.async {
Indicator.shared.hideProgressView()
if let err = error {
print(err.localizedDescription)
return
}
guard let data = data else {return}
do {
let obj = try JSONDecoder().decode(T.self, from: data)
outputBlock(obj)
} catch let jsonErr {
print(jsonErr)
}
}
}.resume()
}
I am trying to build a user regeistration form, which should check if the user already exists. So I am sending a php request to my my mysql server. If the return value is empty, the user does not exists yet.
Unfortunatley I am really stuck with waiting for this check to finish. I tried several solutions I found googleing but none of them worked. My current code uses semaphores and will crash with "fatal error: unexpectedly found nil while unwrapping an Optional value", so the semaphore is not waiting until the task is finished as I would expect it.
Any hints, would be greatly appreciated. Thanks guys.
private func isUniqueEmail(email: String) -> Bool {
var result: Bool?
let semaphore = DispatchSemaphore(value: 1)
let requestURL = URL(string: "http://localhost/firstpostget/functions/get.php")
var request = URLRequest(url: requestURL!)
request.httpMethod = "POST"
let postParameters = "email=" + email
request.httpBody = postParameters.data(using: .utf8)
let configuration = URLSessionConfiguration.default
let session = URLSession(configuration: configuration, delegate: nil, delegateQueue: OperationQueue.main)
let task = session.dataTask(with: request) {(data, response, error) in
var myJson: AnyObject
do{
myJson = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
if myJson.count == 0{
result = true
semaphore.signal()
} else{
result = false
semaphore.signal()
}
} catch{
//TODO
print(error)
}
}
task.resume()
semaphore.wait(timeout: .distantFuture)
return result!
}
Your task is async and you are force unwrapping nil value so this is the reason it crashes.
You have to change your function implementation to also be async, for example using closures:
private func isUniqueEmail(email: String, completion: ((Bool) -> (Void))?) {
let requestURL = URL(string: "http://localhost/firstpostget/functions/get.php")
var request = URLRequest(url: requestURL!)
request.httpMethod = "POST"
let postParameters = "email=" + email
request.httpBody = postParameters.data(using: .utf8)
let configuration = URLSessionConfiguration.default
let session = URLSession(configuration: configuration, delegate: nil, delegateQueue: OperationQueue.main)
let task = session.dataTask(with: request) {(data, response, error) in
var myJson: AnyObject
do{
myJson = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
if myJson.count == 0 {
completion?(true)
} else{
completion?(false)
}
} catch{
//TODO
print(error)
}
}
task.resume()
}
Now you can use this function in this way:
isUniqueEmail(email: "aaa#bbbb.com") { result in
if result {
print("email unique")
} else {
print("email not unique")
}
}
I think you should rethink the pattern you're using to get the data out of your request, you should consider using a custom handler/callback method that you pass along with the email you're trying to check. See below for an example:
private func isUniqueEmail(email: String, handler: ((_ result: Bool) -> Void)?) -> Void {
let requestURL = URL(string: "http://localhost/firstpostget/functions/get.php")
var request = URLRequest(url: requestURL!)
request.httpMethod = "POST"
let postParameters = "email=" + email
request.httpBody = postParameters.data(using: .utf8)
let configuration = URLSessionConfiguration.default
let session = URLSession(configuration: configuration, delegate: nil, delegateQueue: OperationQueue.main)
let task = session.dataTask(with: request) {(data, response, error) in
var myJson: AnyObject
var result: Bool = false
do{
myJson = try JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as AnyObject
if myJson.count == 0 {
result = true
}
guard handler != nil else {
return
}
handler!(result)
} catch{
//TODO
print(error)
}
}
task.resume()
}
Run:
isUniqueEmail(email: "test#test.com", handler: { result in
print(result) // true || false
})
If you really want to go down the "wait" route then take a took at DispatchGroup's
https://developer.apple.com/documentation/dispatch/dispatchgroup
try using this:
ApihelperClass
static let sharedInstance = ApihelperClass()
typealias CompletionHandler = (_ success:Bool, _ error:Bool, _ result:NSDictionary) -> Void
typealias ErrorHandler = (_ success: Bool, _ error:Bool) -> Void
func callPostRequest(_ urlPath: String, params:[String: AnyObject], completionHandler: #escaping CompletionHandler, errorHandler:#escaping ErrorHandler ){
print("urlPath:==> \(urlPath) ")
let session = Foundation.URLSession.shared
let url = URL(string: urlPath)
var request = URLRequest(url : url!)
request.httpMethod = "POST"
do {
let jsonData = try JSONSerialization.data(withJSONObject: params, options: .prettyPrinted)
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.httpBody = jsonData
session.dataTask(with: request, completionHandler: { data, response, error in
OperationQueue.main.addOperation {
guard error == nil && data != nil else { // check for fundamental networking error
print("error=\(error)")
errorHandler(false, true)
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
// print("response = \(response)")
}
let responseString = String(data: data!, encoding: String.Encoding.utf8)
print("responseString = \(responseString!)")
if let responsedata = responseString!.data(using: String.Encoding.utf8)! as? Data{
do {
let jsonResult:NSDictionary = try JSONSerialization.jsonObject(with: responsedata, options: []) as! NSDictionary
print("Get The Result \(jsonResult)")
//parse your jsonResult as per your requirements
if error != nil {
print("error=\(error)")
completionHandler(false, true, jsonResult)//
}
if let str = jsonResult["success"] as? NSNull {
print("error=\(str)")
completionHandler(false, true, jsonResult)
}
else {
let responseString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
// print("Response string : \(responseString)")
completionHandler(true, false, jsonResult)
}
} catch let error as NSError {
print(error.localizedDescription)
}
}
}
}) .resume()
}catch {
print("Error ->Catch")
}
}
Add to your viewcontroller
func isUniqueEmail(email: String){
ApihelperClass.sharedInstance.callPostRequest("http://localhost/firstpostget/functions/get.php", params: ["email":email as AnyObject], completionHandler: { (success, error, result) in
//success 200
}) { (success, error) in
//error
}
}
you can use URlSession like :
func isUniqueEmail(email: String,completion: #escaping (Bool) -> ()) {
var request = URLRequest(url: URL(string: "http://localhost/firstpostget/functions/get.php")!)
request.httpMethod = "POST"
let postString = "email=\(email)"
request.httpBody = postString.data(using: .utf8)
// loading to wait request
UIApplication.shared.isNetworkActivityIndicatorVisible = true
let task = URLSession.shared.dataTask(with: request) { data, response, error in
// we get request request
UIApplication.shared.isNetworkActivityIndicatorVisible = false
guard let data = data, error == nil else { // check for fundamental networking error
print("error=\(String(describing: error))")
completion(false)
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(String(describing: response))")
completion(false)
}else{
completion(true)
}
let responseString = String(data: data, encoding: .utf8)
print("responseString = \(String(describing: responseString))")
}
task.resume()
}
and used in code Like
self.isUniqueEmail(email: "your Email") { (isExit) in
if isExit {
}else{
}
}
Ok, I just found a solution. My semaphore approach actually worked as well as dispatchgroups. The task just needed to be URLSession.shared.dataTask
Still thank's a lot for all the answers.