iOS设备能提供3种不同途径进行定位:Wifi, 蜂窝式移动电话基站, GPS卫星,它是由Core Location框架系统自动分配决定,最终都采用CLLocationManager类来实现定位。
CoreLocation框架 (CoreLocation.framework)可用于定位设备当前经纬度, 通过该框架, 应用程序可计算出用户位置.
其中CLLocationManager是整个CoreLocation框架的核心,定位、方向检测、区域检测等都由该API完成,CLLocationManagerDelegate是一个协议,实现该协议的对象可作为CLLocationManager的delegate对象,负责处理CLLocationManager的定位、方向检测、区域检测等相关事件。
本篇文章提供定位的三个用途
- 获取位置
- 获取方向
- 区域监测
1.授权应用
首先在 info.plis 添加允许在前台获取GPS的描述和允许在前、后台获取GPS的描述
NSLocationWhenInUseUsageDescription
NSLocationAlwaysUsageDescription
2.引用框架
import CoreLocation
3.声明变量
/// 声明一个全局变量
var locationManager:CLLocationManager!
4.实现调用方法
func loacation() {
locationManager = CLLocationManager()
/// 设置定位的精确度
locationManager.desiredAccuracy = kCLLocationAccuracyBest
/// 设置定位变化的最小距离 距离过滤器
locationManager.distanceFilter = 50
/// 设置请求定位的状态
if #available(iOS 8.0, *) {
/// 用户使用期间
locationManager.requestWhenInUseAuthorization()
/// 总是允许
locationManager.requestAlwaysAuthorization()
}
/// 设置代理
locationManager.delegate = self;
if CLLocationManager.locationServicesEnabled(){
/// 开启定位服务
locationManager.startUpdatingLocation()
/// 开启方向服务
locationManager.startUpdatingHeading()
/// 先指定位置中心
var companyCenter = CLLocationCoordinate2D()
companyCenter.latitude = 29.61710109843841
companyCenter.longitude = 106.49967413405561
/// 设置一个方圆200米的范围
let regin = CLCircularRegion.init(center: companyCenter, radius: 200, identifier: "id")
/// 开始监听有没有进入、离开这个区域
locationManager.startMonitoring(for: regin)
} else {
print("没有定位服务")
}
}
5.实现代理方法
extension ViewController: CLLocationManagerDelegate {
/// 定位失败调用的代理方法
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error.localizedDescription)
}
/// 当定位授权状态改变
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .notDetermined:
print("未决定")
case .restricted:
print("未授权")
case .denied:
print("拒绝")
case .authorizedAlways:
print("总是允许")
case .authorizedWhenInUse:
print("仅使用时")
@unknown default:
print("")
}
}
/// 定位更新地理信息调用的代理方法
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
/// 停止定位
manager.stopUpdatingLocation()
/// 获取用户位置的对象
if locations.count > 0, let info = locations.last {
print("海拔:\(info.altitude),经度:\(info.coordinate.longitude), 纬度:\(info.coordinate.latitude)")
let coder = CLGeocoder()
coder.reverseGeocodeLocation(info) { marks, error in
if let list = marks, list.count > 0{
let placemark = list[0]
print("国家:\(placemark.country!) 城市:\(placemark.locality!) 区县:\(placemark.subLocality!) 街道:\(placemark.thoroughfare!)")
}
}
}
}
/// 获取设备的朝向
func locationManager(_ manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) {
print("X:\(newHeading.x),Y:\(newHeading.y),Z:\(newHeading.z),")
}
/// 进入指定区域
func locationManager(_ manager: CLLocationManager, didEnterRegion region: CLRegion) {
let alertController = UIAlertController(title: "提示", message: "进入考核区域", preferredStyle: .alert)
let action = UIAlertAction(title: "确定", style: .cancel, handler: nil)
alertController.addAction(action)
self.present(alertController, animated: true, completion: nil)
}
/// 离开指定区域
func locationManager(_ manager: CLLocationManager, didExitRegion region: CLRegion) {
let alertController = UIAlertController(title: "提示", message: "离开考核区域", preferredStyle: .alert)
let action = UIAlertAction(title: "确定", style: .cancel, handler: nil)
alertController.addAction(action)
self.present(alertController, animated: true, completion: nil)
}
}
6.日志查看
海拔:296.6501636505127,经度:106.49976393700089, 纬度:29.616418640486554
国家:中国 城市:重庆市 区县:渝北区 街道:星光二路
X:-25.39063835144043,Y:1.7516708374023438,Z:-19.735870361328125,
X:-24.315837860107422,Y:2.12103271484375,Z:-20.7313232421875,