Swift GPS地图定位、插大头针获取附近范围

定位相信对于好多app都很有用处，下面来讲解下在Swift3下GPS定位的实现，相对于之前的：

1.首先导入我们需要的类

import MapKit    地图视图库

import SnapKit   这个是布局库

import CoreLocation  定位GPS相关

2.viewDidLoad 实现map的init、locationManager的delegate、全局设置locationManager

var mapView: MKMapView?

//1. create locationManager

let locationManager = CLLocationManager()

override func viewDidLoad() {

super.viewDidLoad()

self.title = "我的位置"

//2.1 地图init

mapView = MKMapView.init()

self.view.addSubview(mapView!)

mapView?.snp.makeConstraints({ (make) in

make.edges.equalTo(UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0))

})

// 2. setup locationManager

locationManager.delegate = self

locationManager.distanceFilter = kCLLocationAccuracyNearestTenMeters

locationManager.desiredAccuracy = kCLLocationAccuracyBest

// 3. setup mapView

mapView?.delegate = self

mapView?.showsUserLocation = true

mapView?.userTrackingMode = .follow

// 4. setup test data

setupData()

// Do any additional setup after loading the view.

}

3.设置在地图上插大头针

func setupData() {

// 1. check if system can monitor regions

if CLLocationManager.isMonitoringAvailable(for: CLCircularRegion.self) {

// 2. region data

let title = "Lorrenzillo' s"

let coordinate = CLLocationCoordinate2DMake(31.18467660, 121.45164569)

let regionRadius = 300.0

// 3. setup region

//            let region = CLCircularRegion(center: CLLocationCoordinate2D(latitude: coordinate.latitude,longitude: coordinate.longitude), radius: regionRadius, identifier: title)

// 4. setup annotation

let restaurantAnnotation = MKPointAnnotation()

restaurantAnnotation.coordinate = coordinate;

restaurantAnnotation.title = "\(title)";

self.mapView?.addAnnotation(restaurantAnnotation)

// 5. setup circle

let circle = MKCircle(center: coordinate, radius: regionRadius)

self.mapView?.add(circle)

}

else {

print("System can't track regions")

}

}

4.设置MKMapView的delegate

//  draw circle 绘制范围

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {

let circleRenderer = MKCircleRenderer(overlay: overlay)

circleRenderer.strokeColor = UIColor.red

circleRenderer.lineWidth = 1.0

return circleRenderer

}

5.设置locationManager的delegate

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

//        updateRegions()

let currLocation: CLLocation!

currLocation = locations.last! as CLLocation

self.reverseGeocode(sender: currLocation, currLocation:currLocation)

}

6.根据经纬度获取具体位置

//解析编译地理位置

func reverseGeocode(sender: AnyObject, currLocation:CLLocation) {

let geocoder = CLGeocoder()

var p:CLPlacemark?

geocoder.reverseGeocodeLocation(currLocation, completionHandler: { (placemarks, error) -> Void in

if error != nil {

print("reverse geodcode fail: \(error!.localizedDescription)")

return

}

let pm = placemarks! as [CLPlacemark]

if (pm.count > 0){

p = placemarks![0]

//                let arrayforProvince:Array = (p?.name!.componentsSeparatedByString("省"))!

guard p != nil

else {

return

}

let arrayforProvince:[String] = (p!.name?.components(separatedBy:"省"))!

let city:String = arrayforProvince.last!

let  arrayforcity:[String] = (city.components(separatedBy:("市")))

self.title = arrayforcity.first;

}else{

print("No Placemarks!")

}

})

}

7.还要设置下viewDidAppear判断CLLocationManager的状态

override func viewDidAppear(_ animated: Bool) {

// 1. status is not determined

if CLLocationManager.authorizationStatus() == .notDetermined {

locationManager.requestAlwaysAuthorization()

}

// 2. authorization were denied

else if CLLocationManager.authorizationStatus() == .denied {

//showAlert("Location services were previously denied, please enable loaction services")

}

// 3. we do have authorization

else if CLLocationManager.authorizationStatus() == .authorizedAlways {

locationManager.startUpdatingLocation()

}

}

是不是很简单，需要真机测试才能正常使用定位，下边是地图定位的视图：

GPS定位图

完整demo戳这里https://github.com/miaozhang9/Swift3.0Test_ImitateAliPay