스위프트 : 위치정보 사용 권한에 따른 예외처리 추가하기

ViewController.swift

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    // 중략
    
    @IBOutlet var requestWeatherButton : UIButton!
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        requestWeatherButton.enabled = false
        
        let status = CLLocationManager.authorizationStatus()
        if status == CLAuthorizationStatus.Denied || status == CLAuthorizationStatus.Restricted {
            let alert = UIAlertController(title: "위치정보", message: "설정에서 위치정보 사용을 위해 권한을 허용해주세요", preferredStyle: UIAlertControllerStyle.Alert)
            alert.addAction(UIAlertAction(title: "확인", style: UIAlertActionStyle.Cancel, handler: nil))
            presentViewController(alert, animated: true, completion: nil)
        }
        else if status == CLAuthorizationStatus.AuthorizedWhenInUse {
            requestWeatherButton.enabled = true
        }
    }
    
    func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
        if status == CLAuthorizationStatus.AuthorizedWhenInUse {
            requestWeatherButton.enabled = true
        }
    }
    
    // 생략
}