Здравствуйте.
Пытаюсь написать приложение отображающим координаты GPS.
Но к несчастью при работе приложения на экране вылезают вот такие артефакты как на картинке.
Изучаю swift совсем недавно, даже не представляю в какую сторону копать для решения проблемы. =(
Алгоритм программы следующий: 1) Получаем координаты 2) форматируем 3) преобразуем в текст 4) присваиваем label.text = обработанный текст.
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
private let locationManager = CLLocationManager()
@IBOutlet var latitudeLabel: UILabel!
@IBOutlet var longitudeLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
} // closing "viewDidLoad"
func locationManager (_ manager:CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
print("Authorization status changed to \(status.rawValue)")
switch status {
case .authorizedAlways, .authorizedWhenInUse:
locationManager.startUpdatingLocation()
default:
locationManager.stopUpdatingLocation()
} // closing "switch"
} // closing locationManager/ChangeAuthorization
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
// let alertController = UIAlertController (title: “Location Manager Error”, message: “Unknown Error”, preferredStyle: .alert)
// let okAction = UIAlertAction (title: “OK”, style: .cancel, handler: {acttion in })
// alertController.addAction (okAction)
// present (alertController, animated: true, completion: nil)
} // closing “locationManager/FailWithError”
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let newLocation = locations.last {
let latitudeRawString = String(newLocation.coordinate.latitude) // getting latitude from GPS
var latDeg = calculate(pos: latitudeRawString).degrees // converting to get DEGREES only
var latMinutes = calculate(pos: latitudeRawString).minutes // converting to get MINUTES only
var decimalSeconds = calculate(pos: latitudeRawString).seconds // converting to get SECONDS only
if latDeg > 0 {
latitudeLabel.text = printLabel(degrees: latDeg, minutes: latMinutes, seconds: decimalSeconds) + "N"
} else {
latDeg = 0 - latDeg
latMinutes = 0 - latMinutes
decimalSeconds = 0 - decimalSeconds
latitudeLabel.text = printLabel(degrees: latDeg, minutes: latMinutes, seconds: decimalSeconds) + "S"
// latitudeLabel.text = String("\(latitudeRawString)")
}
let longitudeRawString = String(newLocation.coordinate.longitude) // getting longitude from GPS
var lonDeg = calculate(pos: longitudeRawString).degrees // converting to get DEGREES only
var lonMinutes = calculate(pos: longitudeRawString).minutes // converting to get MINUTES only
var londecimalSeconds = calculate(pos: longitudeRawString).seconds // converting to get SECONDS only
if lonDeg > 0 {
longitudeLabel.text = printLabel(degrees: lonDeg, minutes: lonMinutes, seconds: londecimalSeconds) + "E"
} else {
lonDeg = 0 - lonDeg
lonMinutes = 0 - lonMinutes
londecimalSeconds = 0 - londecimalSeconds
longitudeLabel.text = printLabel(degrees: lonDeg, minutes: lonMinutes, seconds: londecimalSeconds) + "W"
// longitudeLabel.text = String("\(longitudeRawString)")
}
}
} // closing "locationManger/didUpdateLocations"
func calculate (pos:String) -> (degrees:Int, minutes:Int, seconds:Int) {
let remainMinutes = Double(pos)?.truncatingRemainder(dividingBy: 1)
let degrees1 = Double(pos)! - (remainMinutes)!
var minutes1 = remainMinutes! * 60
var seconds1 = minutes1.truncatingRemainder(dividingBy: 1)
minutes1 = minutes1 - seconds1
seconds1 = seconds1 * 100
let garbage = seconds1.truncatingRemainder(dividingBy: 1)
seconds1 = round((seconds1 - garbage)/10)
let degrees = Int(degrees1)
let minutes = Int(minutes1)
let seconds = Int(seconds1)
return (degrees,minutes,seconds)
} // closing "calculate" function
func printLabel (degrees:Int, minutes:Int, seconds:Int) -> String {
let degrees = degrees
let minutes = minutes
let seconds = seconds
if degrees < 10 {
let degreesString = String("0" + "\(degrees)")
if minutes < 10 {
let minutesString = String("0" + "\(minutes)")
let text = String("\(degreesString)" + "\u{00B0}" + "\(minutesString)" + "'" + "\(seconds)")
return text
} else {
let text = String("\(degreesString)" + "\u{00B0}" + "\(minutes)" + "'" + "\(seconds)")
return text
}
} else {
if minutes < 10 {
let minutesString = String("0" + "\(minutes)")
let text = String("\(degrees)" + "\u{00B0}" + "\(minutesString)" + "'" + "\(seconds)")
return text
} else {
let text = String("\(degrees)" + "\u{00B0}" + "\(minutes)" + "'" + "\(seconds)")
return text
}
}
} // closing "printLabel" function
}
