當用戶點擊一個按鈕時，他們在靠近某個位置時獲得x點（SWIFT）

我想要的是，當用戶單擊按鈕時，我希望代碼檢查它們是否在位置附近然後他們拿分，我只是不能確定在哪裏把這些信息當用戶點擊一個按鈕時，他們在靠近某個位置時獲得x點（SWIFT）

class ViewController: UIViewController ,CLLocationManagerDelegate { 

    @IBOutlet weak var map: MKMapView! 
    let manager = CLLocationManager() 

    @IBAction func getPoints(_ sender: Any) { 
    //not sure what to add here, check the ... 
    } 

    override func viewDidLoad() 
    { 
     super.viewDidLoad() 
     manager.delegate = self 
     manager.desiredAccuracy = kCLLocationAccuracyBest 
     manager.requestWhenInUseAuthorization() 
     manager.startUpdatingLocation() 
    } 

//to show the map 
    func locationManager(_ manager: CLLocationManager,  didUpdateLocations locations: [CLLocation]) 
    { 
     let location = locations[0] 
     let span:MKCoordinateSpan = MKCoordinateSpanMake(0.01, 0.01) 
     let myLocation:CLLocationCoordinate2D =  CLLocationCoordinate2DMake(location.coordinate.latitude,  location.coordinate.longitude) 
     let region:MKCoordinateRegion =  MKCoordinateRegionMake(myLocation, span) 
     map.setRegion(region, animated: true) 
     self.map.showsUserLocation = true 

    //do i put this (the code below) under the @IBAction 

     let userLocation = locations.last! as CLLocation 
     let desiredLocation = CLLocation(latitude: 50.000000,  longitude: -50.000000) 

     let radius: Double = 0.25 // miles 
     let distance = desiredLocation.distance(from: userLocation) 
     if distance < radius { 
     } 
    } 
}

來源

2017-06-16 g. harries

是該計算距離的代碼裏面去IBAction爲。你可以從_manager.location_ – kathayatnk

獲得用戶當前的位置，所以如果我使用manager.location是我的代碼所需的「let userLocation = locations.last！as CLLocation」？你可以複製並粘貼我的代碼給我看，我真的很感激它。謝謝！ –

只是startLocationUpdates，然後manager.location將具有最新的檢索位置。沒有這個需要「讓userLocation = locations.last！作爲CLLocation」查看我對IBAction的回答 – kathayatnk

像這樣的事情

@IBAction func getPoints(_ sender: UIButton) { 
    //since this can be nil we have to check if there is any currently retrieved location 
    if let currentUserLocation = manager.location { 

     //location to check with 
     let desiredLocation = CLLocation(latitude: 50.000000, longitude: -50.000000) 
     let radius: Double = 0.25 // miles 
     let distance = desiredLocation.distance(from: currentUserLocation) 
     if distance < radius { 
      //do things 
     } 
    } 
}

來源

2017-06-16 18:49:38 kathayatnk

感謝您澄清，這現在更有意義 –

當用戶點擊一個按鈕時，他們在靠近某個位置時獲得x點（SWIFT）

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