Pre-fill a webhook response into the text field in SwiftUI - ios

Question

I made a simple SwiftUI webhook app in Swift Playgrounds that surprisingly supports URLSession when making a HTTP request. Now what I would like to see if there is a way to take that response (for instance, from RequestBIN) after a POST request, and prefill it into a simple text area.
Here’s the code
struct ContentView: View {
#State private var TweetID = ""
var body: some View {
NavigationView {
Form {
Section(footer: Text("Where it should place the response data")) {
TextField("Field to place response data", text: $TweetID)
}
Section {
Button("Get Data") {
self.RequestTest()
}
}
}
}
}
func RequestTest() {
let semaphore = DispatchSemaphore (value: 0)
let parameters = "Foo=Bar"
let postData = parameters.data(using: .utf8)
var request = URLRequest(url: URL(string: "https://requestbin.net/r/OMG_IT_DOES")!,timeoutInterval: Double.infinity)
request.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.httpMethod = "POST"
request.httpBody = postData
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data else {
print(String(describing: error))
semaphore.signal()
return
}
print(String(data: data, encoding: .utf8)!)
semaphore.signal()
}
task.resume()
semaphore.wait()
}
}
note that I guess the code print(String(data: data, encoding: .utf8)!) that whereas data is the response needed to fill in the text field which is......I guess the ID or varible scope whatmacallsit $TweetID

Answer 1

try this example code to fetch the requested data and display it in your view:
EDIT-2: using completion closure for possible alert.
struct ContentView: View {
#State private var response = ""
#State private var showAlert = false
var body: some View {
NavigationView {
Form {
Section(footer: Text(response)) {
TextField("Field to place response data", text: $response)
}
Section {
Button("Get Data") {
requestTest() { results in
response = results
if response == "No Data!" {
showAlert = true
}
}
}
}
}
.alert(isPresented: $showAlert) {
Alert(title: Text("alertTitle"), message: Text("error"), dismissButton: .default(Text("OK")))
}
}
}
func requestTest(completion: #escaping(String) -> ()) { // <--- here completion closure
if let url = URL(string: "https://requestbin.net/r/d21yhb0r") {
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
var components = URLComponents(url: url, resolvingAgainstBaseURL: false)!
components.queryItems = [ URLQueryItem(name: "Foo", value: "BAR") ]
if let query = components.url!.query {
request.httpBody = Data(query.utf8)
}
let task = URLSession.shared.dataTask(with: request) { data, response, error in
if let data = data,
let apiResponse = String(data: data, encoding: .utf8) {
completion(apiResponse) // <--- here
} else {
completion("No Data!") // <--- here
}
}
task.resume()
}
}
}