I currently have a button and a text field, named offlineListing and productURLField respectively. I am trying to automatically input the text "N/A" into the productURLField once offlineListing has been selected by using the following syntax: @IBOutlet weak var productURLField: UITextField! @IBAction func offlineListing(_ sender: Any) { let productURLField = "N/A" } However once the button is selected, nothing happens. Is there a reason as to why this isn't working properly?

I have a UILabel called "itemOneURL" which reads a URL from an external database and adds the value to this label as a string. I've got a separate button called "viewItemOne" (using a working segue) which once selected, will take the contents of the "itemOneURL" URL and open this link using the default browser. Here is the code I am currently using to segue the button and label. @IBOutlet weak var itemOneURL: UILabel! @IBAction func viewItemOne(_ sender: UIButton) { let firstURL = itemOneURL as? String UIApplication.shared.open(URL(string:"\(firstURL)")! as URL, options: [:], completionHandler: nil) } However, once I select this button on the UI my application doesn't do anything. Whereas when I use the following syntax elsewhere, it works and loads the URL? UIApplication.shared.open(URL(string:"https://www.apple.com")! as URL, options: [:], completionHandler: nil) Is there something I am doing wrong which is currently causing the button to not perform any action once selected? If so, how can I rectify this and get it working please?

I am using the following syntax in a View Controller (using a Storyboard) to remove the second element of an array in a database. @IBAction func deleteItemOne(_ sender: UIButton) { if userId == user?.uid { let group_array = document["product"] as? [String] ?? [""] if (group_array.count) 1 { document.reference.updateData([ "product": FieldValue.arrayRemove([group_array[1]]) ]) self.viewDidLoad() self.viewWillAppear(true) } } } Once the element of the array has been removed, I am using the following syntax to then reload the View Controller. self.viewDidLoad() self.viewWillAppear(true) However after removal of the element, the View Controller doesn't reload as intended, and in-fact it doesn't end up doing anything. This leads to my question, is there a simple Swift function / method that I can call to reload the View Controller upon completion?

I have a string - "productRaw" which I am splitting up to show in separate sectionData cells, whilst under the same "Item 1" cellData table view. This is the code I am using to split up the String and add each separate part to a separate sectionData cell. let group_array = document["product"] as? [String] ?? [""] let productName1 = group_array.first ?? "No data to display :(" let productRaw = "\(productName1)" let componentsRaw = productRaw.components(separatedBy: ", ") var product = [String: String]() for component in componentsRaw { let keyVal = component.components(separatedBy: ": ") product[keyVal[0]] = keyVal[1] } if let productName = product["Product Name"], let listingPrice = product["Listing Price"], let briefDescription = product["A brief description"], let productURL = product["Product URL"], let activeUntil = product["Listing active until"] { self.tableViewData = [cellData(opened: false, title: "Item 1", sectionData: [productName], [listingPrice], [briefDescription], [productURL], [activeUntil])] } Where I am declaring the individual cells I want to be shown for the first section - "Item 1", when I only use [productName] in my sectionData then this compiles without any issues. However when I also add , [listingPrice], [briefDescription], [productURL], [activeUntil] to my sectionData I receive the following error for the [cellData(opened: syntax. Extra arguments at positions #4, #5, #6, #7 in call So my question is, why am I receiving the above error and what can I do to resolve it?

I am trying to incorporate some SwiftUI into my UIKit based iPhone application. I have a view controller in my Storyboard called ‘SellingNewsViewController’ with an associated “.swift” file. In this “SellingNewsViewController.swift" file, I am using the following code to try and create a UIHostingController to show the SwiftUI code I currently have in another file called “ContentView.swift”. class SellingNewsViewController: UIViewController {     override func viewDidLoad() {         super.viewDidLoad() let controller = UIHostingController(rootView: ContentView())         self.addChild(controller)         self.view.addSubview(controller.view)         controller.didMove(toParent: self)     } And I have a SwiftUI file in this directory (the code I am trying to run) named ‘ContentView.swift’ which has the following Syntax: import SwiftUI import SwiftyJSON import SDWebImageSwiftUI import WebKit struct ContentView: View {     @ObservedObject var list = getData()     var body: some View {         NavigationView{             List(list.datas){i in             NavigationLink(destination:                 webView(url: i.url)                                 .navigationBarTitle("", displayMode: .inline)){                     HStack(spacing: 15){                       VStack(alignment: .leading, spacing: 10){                             Text(i.title).fontWeight(.heavy)                             Text(i.desc)                         }                         if i.image != "" {                             WebImage(url: URL(string: i.image)!, options: .highPriority, context: nil)                                 .resizable()                                 .frame(width: 110, height: 135)                                 .cornerRadius(20).lineLimit(2)                         }                     }.padding(.vertical, 15)                 }             }.navigationBarTitle("Headlines")         }     } } struct ChildHostingController_Previews: PreviewProvider {     static var previews: some View {         ContentView()     } } struct dataType : Identifiable {     var id : String     var title : String     var desc : String     var url : String     var image : String } class getData : ObservableObject{     @Published var datas = [dataType]()     init() {         let source = "https://newsapi.org/v2/top-headlines?country=gb&category=business&apiKey=mykeyishere"         let url = URL(string: source)!         let session = URLSession(configuration: .default)         session.dataTask(with: url) { (data, _, err) in             if err != nil{                 print((err?.localizedDescription)!)                 return             }       let json = try! JSON(data: data!)             for i in json["articles"] {                 let title = i.1["title"].stringValue                 let description = i.1["description"].stringValue                 let url = i.1["url"].stringValue                 let image = i.1["urlToImage"].stringValue                 let id = i.1["publishedAt"].stringValue                 DispatchQueue.main.async {                     self.datas.append(dataType(id: id, title: title, desc: description, url: url, image: image))                 }             }         }.resume()     } } struct webView : UIViewRepresentable { var url : String     func makeUIView(context: UIViewRepresentableContextwebView) - WKWebView{         let view = WKWebView()         view.load(URLRequest(url: URL(string: url)!))         return view     }     func updateUIView(_ uiView: WKWebView, context: UIViewRepresentableContextwebView) {     } } I understand that I need to use a UIHostingController to show SwiftUI views in my UIKit application, however whenever I load up my ‘SellingNewsViewController’, I just receive a blank screen, as shown here - h ttps://imgur.com/a/GlyWV9i Am I doing something wrong to try and create/show the UIHostingController? 

Hi, I'm super sorry if this is a silly question - I've literally only just gotten into swift and am learning! Basically, I'm making a Mac App where you select 'submit' from one page (Page A), and it opens up another page (page B). I need to be able to write code for page B but as it is in the same controller file as Page A I can't seem to merge the two together. Here's my code: import Cocoa class ViewController: NSViewController {  	@IBOutlet weak var enternamehere: NSTextField!          @IBOutlet weak var welcomemessage: NSTextField!     override func viewDidLoad() {         super.viewDidLoad()       }     override var representedObject: Any? {         didSet {         // Update the view, if already loaded.         }     }     @IBAction func submit(_ sender: Any) {         var name = enternamehere.stringValue         if name.isEmpty {           name = "person without a name"         }         let greeting = "Hello \(name)!"         welcomemessage.stringValue = greeting              } } // Here is where I guess I need to reference Page B? I have included a link here - h ttps://i.imgur.com/lu2oEbu.png to a screenshot of my Xcode in case my question is confusing. Thanks guys! :)

I am using the following Swift in a View Controller to adapt an existing UITextField to a date format. @IBOutlet weak var productTimeRemainingField: UITextField!     private var datePicker: UIDatePicker?     override func viewDidLoad() {         super.viewDidLoad()         datePicker = UIDatePicker()         datePicker?.datePickerMode = .dateAndTime datePicker?.addTarget(self, action: #selector(newProductViewController.dateChanged(datePicker:)), for: .valueChanged) let tapGesture = UITapGestureRecognizer(target: self, action: #selector(newProductViewController.viewTapped(gestureRecognizer:)))         view.addGestureRecognizer(tapGesture)         productTimeRemainingField.inputView = datePicker     } @objc func viewTapped(gestureRecognizer: UITapGestureRecognizer) {         view.endEditing(true)     } @objc func dateChanged(datePicker: UIDatePicker) {         let dateFormatter = DateFormatter()         dateFormatter.dateFormat = "dd/MM/yyyy hh:mm:ss"         productTimeRemainingField.text = dateFormatter.string(from: datePicker.date)         view.endEditing(true)         if #available(iOS 13.4, *) {               datePicker.preferredDatePickerStyle = .compact           }     } The above code is working, and allows me to select both a time and date, however when the field is selected, the section where a user selects the time and date is shown right at the bottom of the page, making it nearly impossible to properly make a selection. Does anyone have any idea why this is happening, and how I can fix this so it is shown in the centre of the View Controller (as with the majority of other apps - see here - (h ttps://i.stack.imgur.com/M0os7.png) for an example. This is a screenshot (h ttps://imgur.com/a/OqKXcR7) as to how the date picker currently is appearing.     

I am trying to hide a button called "itemOneDelete" when a label ("itemOneLabel") on my View Controller is empty, by using an 'if' loop to change the visibility of the button to "alpha = 0" by using the following code: } However I am receiving the following error for the itemOneDelete.alpha = 0 line and I can't seem to fathom why. Value of type '(UIButton) - ()' has no member 'alpha' I have also tried replacing line three with the following syntax, however I received a similar error: itemOneDelete.hidden = true Value of type '(UIButton) - ()' has no member 'hidden' Can anyone explain why I am getting this error and how to resolve it please?