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Question

में क्यूबाला दिशा (दिशा के लिए सरल कंपास) ढूंढना चाहता हूं, सभी कोड अच्छी तरह से काम करते हैं लेकिन यह आवश्यक परिणाम नहीं देता है। दिशा सुई सही स्थान पर नहीं जाती है। कभी-कभी यह काम करता है, कभी-कभी नहीं।

func DegreesToRadians (value:Double) -> Double { 
    return value * M_PI/180.0 
} 

func RadiansToDegrees (value:Double) -> Double { 
    return value * 180.0/M_PI 
} 

class ViewController: UIViewController , CLLocationManagerDelegate { 
    var needleAngle : Double? 

    //Main Composs 
    @IBOutlet weak var composs: UIImageView! 

    //Needle Move with respect to compose 
    @IBOutlet weak var needle: UIImageView! 

    @IBOutlet weak var mapView: MKMapView! 

    // Kabhalocation 
    var kabahLocation : CLLocation? 
    var latitude : Double? 
    var longitude : Double? 
    var distanceFromKabah : Double? 

    let locationManger = CLLocationManager() 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     //KabhaLocation Hardcoded. 
     kabahLocation = CLLocation(latitude: 21.42 , longitude: 39.83) 

     //Delegate 
     self.locationManger.delegate = self 
     self.locationManger.desiredAccuracy = kCLLocationAccuracyBest 
     if #available(iOS 8.0, *) { 
      self.locationManger.requestAlwaysAuthorization() 
     } else { 
      // Fallback on earlier versions 
     } 

     self.locationManger.startUpdatingLocation() 
     self.locationManger.startUpdatingHeading() 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    // Mark: - LocationManger Delegate 

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 
     let location = locations.last 
let center = CLLocationCoordinate2D(latitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!) 
     print("current location latitude \((location?.coordinate.latitude)!) and longitude \((location?.coordinate.longitude)!)") 

     self.latitude = location?.coordinate.latitude 
     self.longitude = location?.coordinate.longitude 
// 
//  self.latitude = 31.5497 
//  self.longitude = 74.3436 

     self.locationManger.startUpdatingLocation() 

     needleAngle  = self.setLatLonForDistanceAndAngle(location!) 
    } 

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) { 
     print("Error " + error.localizedDescription) 
    } 

    func setLatLonForDistanceAndAngle(userlocation: CLLocation) -> Double 
    { 
     let lat1 = DegreesToRadians(userlocation.coordinate.latitude) 
     let lon1 = DegreesToRadians(userlocation.coordinate.longitude) 
     let lat2 = DegreesToRadians(kabahLocation!.coordinate.latitude) 
     let lon2 = DegreesToRadians(kabahLocation!.coordinate.longitude) 

     distanceFromKabah = userlocation.distanceFromLocation(kabahLocation!) 
     let dLon = lon2 - lon1; 

     let y = sin(dLon) * cos(lat2) 

     let x = cos(lat1) * sin(lat2) - sin(lat1) * cos(lat2) * cos(dLon) 
     var radiansBearing = atan2(y, x) 

     if(radiansBearing < 0.0) 
     { 
      radiansBearing += 2*M_PI; 
     } 
//  print("Initial Bearing \(radiansBearing*180/M_PI)") 

     let distanceFromKabahUnit = 0.0 

     return radiansBearing 
    } 

    func locationManager(manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) { 
     let needleDirection = -newHeading.trueHeading; 
     let compassDirection = -newHeading.magneticHeading; 

     self.needle.transform = CGAffineTransformMakeRotation(CGFloat(((Double(needleDirection))/180.0) + needleAngle!)) 
     print("Needle \(CGAffineTransformMakeRotation(CGFloat(((Double(needleDirection))/180.0) + needleAngle!)))") 
     self.composs.transform = CGAffineTransformMakeRotation(CGFloat((Double(compassDirection))/180.0)) 
     print("composs \(CGAffineTransformMakeRotation(CGFloat((Double(compassDirection))/180.0)))") 
    } 

    override func viewDidAppear(animated: Bool) { 
     needleAngle = 0.0 
     self.locationManger.startUpdatingHeading() 
     kabahLocation = CLLocation(latitude: 21.42 , longitude: 39.83) 
     self.locationManger.delegate = self 

    } 

    override func viewDidDisappear(animated: Bool) { 
     self.locationManger.delegate = nil 
    } 

Answer 1

// 
// ViewController.swift 
// CurrentLocation 
// 
// Created by Muhammad Rizwan Anjum on 26/8/16. 
// Copyright © 2016 Muhammad Rizwan Anjum. All rights reserved. 
// 

import UIKit 
import MapKit 
import CoreLocation 

func DegreesToRadians (value:Double) -> Double { 
    return value * M_PI/180.0 
} 

func RadiansToDegrees (value:Double) -> Double { 
    return value * 180.0/M_PI 
} 

class ViewController: UIViewController , CLLocationManagerDelegate { 

    var needleAngle : Double? 

    @IBOutlet weak var composs: UIImageView! 
    @IBOutlet weak var needle: UIImageView! 
    @IBOutlet weak var mapView: MKMapView! 
    var kabahLocation : CLLocation? 
    var latitude : Double? 
    var longitude : Double? 
    var distanceFromKabah : Double? 

    let locationManger = CLLocationManager() 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     kabahLocation = CLLocation(latitude: 21.42 , longitude: 39.83) 

     self.locationManger.delegate = self 
     self.locationManger.desiredAccuracy = kCLLocationAccuracyBest 
     if #available(iOS 8.0, *) { 
      self.locationManger.requestAlwaysAuthorization() 
     } else { 
      // Fallback on earlier versions 
     } 

     self.locationManger.startUpdatingLocation() 
     self.locationManger.startUpdatingHeading() 

    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    // Mark: - LocationManger Delegate 

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 
     let location = locations.last 
//  let center = CLLocationCoordinate2D(latitude: (location?.coordinate.latitude)!, longitude: (location?.coordinate.longitude)!) 
     print("current location latitude \((location?.coordinate.latitude)!) and longitude \((location?.coordinate.longitude)!)") 

     self.latitude = location?.coordinate.latitude 
     self.longitude = location?.coordinate.longitude 
// 
//  self.latitude = 31.5497 
//  self.longitude = 74.3436 
     self.locationManger.startUpdatingLocation() 
     needleAngle  = self.setLatLonForDistanceAndAngle(location!) 

    } 
    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) { 
     print("Error " + error.localizedDescription) 
    } 

    func setLatLonForDistanceAndAngle(userlocation: CLLocation) -> Double 
    { 
     let lat1 = DegreesToRadians(userlocation.coordinate.latitude) 
     let lon1 = DegreesToRadians(userlocation.coordinate.longitude) 
     let lat2 = DegreesToRadians(kabahLocation!.coordinate.latitude) 
     let lon2 = DegreesToRadians(kabahLocation!.coordinate.longitude) 

     distanceFromKabah = userlocation.distanceFromLocation(kabahLocation!) 
     let dLon = lon2 - lon1; 
     let y = sin(dLon) * cos(lat2) 
     let x = cos(lat1) * sin(lat2) - sin(lat1) * cos(lat2) * cos(dLon) 
     var radiansBearing = atan2(y, x) 
     if(radiansBearing < 0.0) 
     { 
      radiansBearing += 2*M_PI; 
     } 
//  print("Initial Bearing \(radiansBearing*180/M_PI)") 
     let distanceFromKabahUnit = 0.0 



     return radiansBearing 

    } 

    func locationManager(manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) { 

     let needleDirection = -newHeading.trueHeading; 
     let compassDirection = -newHeading.magneticHeading; 

//you Need to Multiply With M_PI 

     self.needle.transform = CGAffineTransformMakeRotation(CGFloat(((Double(needleDirection) * M_PI)/180.0) + needleAngle!)) 
     print("Needle \(CGAffineTransformMakeRotation(CGFloat(((Double(needleDirection) * M_PI)/180.0) + needleAngle!)))") 
     self.composs.transform = CGAffineTransformMakeRotation(CGFloat((Double(compassDirection) * M_PI)/180.0)) 
     print("composs \(CGAffineTransformMakeRotation(CGFloat((Double(compassDirection) * M_PI)/180.0)))") 
    } 

    override func viewDidAppear(animated: Bool) { 
     needleAngle = 0.0 
     self.locationManger.startUpdatingHeading() 
     kabahLocation = CLLocation(latitude: 21.42 , longitude: 39.83) 
     self.locationManger.delegate = self 

    } 
    override func viewDidDisappear(animated: Bool) { 
     self.locationManger.delegate = nil 
    } 




} 

Answer 2

वास्तव में क्या आप गलत यहाँ क्या कर रहे हैं बना रही है कम्पास बारी बारी से में didLocationChange विधि। दरअसल आपको पृथ्वी के सही उत्तर के अनुसार घूर्णन की आवश्यकता होती है और इसके लिए आपको didUpdateLocationHeader का उपयोग करने की आवश्यकता है। यह आपको पृथ्वी के सही उत्तर के अनुसार रीडिंग देता है। मैं नीचे अपना कोड पोस्ट कर रहा हूं। तुम भी पर एक पूर्ण काम कर परियोजना पा सकते हैं मेरी github

import UIKit 

import CoreLocation 

class ViewController: UIViewController ,CLLocationManagerDelegate{ 

@IBOutlet weak var ivCompassBack: UIImageView! 
@IBOutlet weak var ivCompassNeedle: UIImageView! 

let latOfKabah = 21.4225 
let lngOfKabah = 39.8262 

var location: CLLocation? 

let locationManager = CLLocationManager() 


var bearingOfKabah = Double() 

override func viewDidLoad() { 

    super.viewDidLoad() 
    initManager() 

} 


func initManager(){ 

    locationManager.requestAlwaysAuthorization() 

    locationManager.requestWhenInUseAuthorization() 

    if CLLocationManager.locationServicesEnabled() { 

     locationManager.delegate = self 
     locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters 
     locationManager.startUpdatingLocation() 
     locationManager.startUpdatingHeading() 

    } 
} 

func locationManager(_ manager: CLLocationManager, didUpdateHeading heading: CLHeading) { 


    let north = -1 * heading.magneticHeading * Double.pi/180 

    let directionOfKabah = bearingOfKabah * Double.pi/180 + north 

    ivCompassBack.transform = CGAffineTransform(rotationAngle: CGFloat(north)); 

    ivCompassNeedle.transform =  CGAffineTransform(rotationAngle: CGFloat(directionOfKabah)); 


} 

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { 

    let newLocation = locations.last! 

    location = newLocation 

    bearingOfKabah = getBearingBetweenTwoPoints1(location!, latitudeOfKabah: self.latOfKabah, longitudeOfKabah: self.lngOfKabah) //calculating the bearing of KABAH 
} 


func degreesToRadians(_ degrees: Double) -> Double { return degrees * Double.pi/180.0 } 


func radiansToDegrees(_ radians: Double) -> Double { return radians * 180.0/Double.pi } 

func getBearingBetweenTwoPoints1(_ point1 : CLLocation, latitudeOfKabah : Double , longitudeOfKabah :Double) -> Double { 

    let lat1 = degreesToRadians(point1.coordinate.latitude) 
    let lon1 = degreesToRadians(point1.coordinate.longitude) 

    let lat2 = degreesToRadians(latitudeOfKabah); 
    let lon2 = degreesToRadians(longitudeOfKabah); 

    let dLon = lon2 - lon1; 

    let y = sin(dLon) * cos(lat2); 
    let x = cos(lat1) * sin(lat2) - sin(lat1) * cos(lat2) * cos(dLon); 
    var radiansBearing = atan2(y, x); 
    if(radiansBearing < 0.0){ 

     radiansBearing += 2 * Double.pi; 

    } 

    return radiansToDegrees(radiansBearing) 
} 

}