I want to use a iPad to display a web app. The iPad will be used by many people, so I dont want the users to be able to navigate to any other sites. Is it possible to "remove" the top bar in safari (or any other browsers on iPad)

I'm trying to implement sending of SMS in my app. I want to try this via a 3rd party. So I need to make a HTTP GET request for sending the SMS: https://sveve.no/SMS/SendMessage?user=*&passwd=*&to=***&msg=Meldingstekst&f=json  I tried this:  let url = URL(string: "https://sveve.no/SMS/SendMessage?user=myUser&passwd=myPassword&to=12345678&msg=This is the message text&f=json")! let task = URLSession.shared.dataTask(with: url) {(data, response, error) in guard let data = data else { return } print(String(data: data, encoding: .utf8)!) } task.resume() Fatal error: Unexpectedly found nil while unwrapping an Optional value The error is on the URL. What can be the issue?

I´m creating a app that needs to send SMS to different recievers when a button is tapped. The reciever will be selected from a dropdown that the user selects from. I have no experience with sending SMS from an app. I would like to be able to use WIFI and not be depending on SIM-cards to send messages. Does anyone have some tips regarding how I should go about to solve this?

I´m currently making an app for a small business that are located in another part of my country. This is a app just for that one business, and should not be available to others. What is the best way to do this? I need to be able to update, and add functions to the application at a later time. Do I need to put it up on AppStore?

I need to send a mail(s) in the background for my app. What is the best way of doing this? I have tried Mailgun, but hav not got it working. Any tips on what the best/easiest way to send mail in background? Here´s the code I was trying for Mailgun: let parameters = [ "from": "my@mail.com", "to": "you@mail.com", "subject": "Test", "text": "Testing"] let header : HTTPHeaders = [ "Authorization": "MY-KEY", "Content-Type" : "application/x-www-form-urlencoded"] let url = "MY-URL" AF.request(url, method: .post, parameters: parameters, encoding: URLEncoding.default, headers: header) .responseJSON { response in print("Response: \(response)") }This throws the following error:failure(Alamofire.AFError.responseSerializationFailed(reason: Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(error: Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.})))

First off: I´m not sure if this is the right forum for this question. If it´s not, i apologize..I want to implement SMS from Twilio, and are following this guide: https://www.twilio.com/blog/2018/03/sending-text-messages-in-swift-with-twilio.html When I try to test using the command: swift build && ./.build/debug/MyDrive/MyFolder/MySwiftProject I get the following error: error: terminated(72): xcrun --sdk macosx --find xctest output: xcrun: error: unable to find utility "xctest", not a developer tool or in PATHWhat is this error? And what can have gone wrong?