Swift - 使用CoreLocation实现定位(经纬度、海拔、速度、距离等)
CoreLocation是iOS中一个提供设备定位的框架。通过这个框架可以实现定位处理,从而获取位置数据,比如经度、纬度、海拔信息等。
1,定位精度的设置 定位服务管理类CLLocationManager的desiredAccuracy属性表示精准度,有如下6种选择:kCLLocationAccuracyBestForNavigation :精度最高,一般用于导航
kCLLocationAccuracyBest : 精确度最佳
kCLLocationAccuracyNearestTenMeters :精确度10m以内
kCLLocationAccuracyHundredMeters :精确度100m以内
kCLLocationAccuracyKilometer :精确度1000m以内
kCLLocationAccuracyThreeKilometers :精确度3000m以内
var currentLocation = CLLocation(latitude: 52.104526, longitude: 51.111151) var targetLocation = CLLocation(latitude: 52.105526, longitude: 51.141151) var distance:CLLocationDistance = currentLocation.distanceFromLocation(targetLocation) println("两点间距离是:\(distance)")
4,下面通过一个样例演示如何获取设备相关的位置数据(经度,纬度,海拔,速度等信息)
(1)在 info.plist里加入定位描述(Value值为空也可以): NSLocationWhenInUseDescription :允许在前台获取GPS的描述 NSLocationAlwaysUsageDescription :允许在后台获取GPS的描述
(2)代码如下:
import UIKit import CoreLocation class ViewController: UIViewController, CLLocationManagerDelegate { //定位管理器 let locationManager:CLLocationManager = CLLocationManager() @IBOutlet weak var label1: UILabel! @IBOutlet weak var label2: UILabel! @IBOutlet weak var label3: UILabel! @IBOutlet weak var label4: UILabel! @IBOutlet weak var label5: UILabel! @IBOutlet weak var label6: UILabel! @IBOutlet weak var label7: UILabel! override func viewDidLoad() { super.viewDidLoad() //设置定位服务管理器代理 locationManager.delegate = self //设置定位进度 locationManager.desiredAccuracy = kCLLocationAccuracyBest //更新距离 locationManager.distanceFilter = 100 ////发送授权申请 locationManager.requestAlwaysAuthorization() if (CLLocationManager.locationServicesEnabled()) { //允许使用定位服务的话,开启定位服务更新 locationManager.startUpdatingLocation() print("定位开始") } } //定位改变执行,可以得到新位置、旧位置 func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { //获取最新的坐标 let currLocation:CLLocation = locations.last! label1.text = "经度:\(currLocation.coordinate.longitude)" //获取纬度 label2.text = "纬度:\(currLocation.coordinate.latitude)" //获取海拔 label3.text = "海拔:\(currLocation.altitude)" //获取水平精度 label4.text = "水平精度:\(currLocation.horizontalAccuracy)" //获取垂直精度 label5.text = "垂直精度:\(currLocation.verticalAccuracy)" //获取方向 label6.text = "方向:\(currLocation.course)" //获取速度 label7.text = "速度:\(currLocation.speed)" } }
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