CoreLocation---iOS中的位置信息

在iOS系统中, 使用CoreLocation可以获取到用户当前位置, 以及设备移动信息.

基本步骤:

1. import CoreLocation,
2. ViewController 继承 CLLocationManagerDelegate 协议,
3. 实现CLLocationManager的didUpdateLocations, didUpdateToLocation等方法,
4. 开始定位: 调用CLLocationManager的startUpdatingLocation方法.
5. 设备自身的定位要开启.

ViewController

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBOutlet weak var latitudeLabel: UILabel!
    @IBOutlet weak var longitudeLabel: UILabel!

    let locationManager: CLLocationManager = CLLocationManager()

    var currentLocation: CLLocation!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.distanceFilter = kCLLocationAccuracyKilometer
    }

    override func viewWillAppear(animated: Bool) {
        locationManager.startUpdatingLocation()
        println("start location")
    }

    override func viewWillDisappear(animated: Bool) {
        locationManager.stopUpdatingLocation()
        println("stop location")
    }

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

    func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
        println("didUpdateLocations")
        currentLocation = locations.last as! CLLocation
        latitudeLabel.text = "\(currentLocation.coordinate.latitude)"
        longitudeLabel.text = "\(currentLocation.coordinate.longitude)"
    }

    func locationManager(manager: CLLocationManager!, didUpdateToLocation newLocation: CLLocation!, fromLocation oldLocation: CLLocation!) {
        println("didUpdateToLocation")
    }

    func locationManager(manager: CLLocationManager!, didFailWithError error: NSError!) {
        println("didFailWithError")
    }
}

模拟器定位设置

使用iPhone simulator时, 最初只看到打印”start location”, 即没有成功调用didUpdateLocations.

原因在于simulator默认将定位关闭, 需要我们自己打开.

1. 打开定位调试选项, 这里, 我们可以选择Apple:

2. 设置simulator中的Settings->Privacy->Location中的定位选项, 设为always:	3. 回到APP界面, 即可看到位置信息:
4. 我们也可以自己选取模拟位置, 如选择Hong Kong:	5. 可以看到, 对应模拟位置的经纬度信息:
-	-

6. 我们也可以自行输入经纬度值来设置位置:

CoreLocation的基本使用就是以上这些了, 更加复杂的以后再补充了.