Swift：用户位置附近的地理围栏/地理定位

Question

问题：

我试图让它一直使用用户的位置并不断检查它是否在CLLocationCoordinate2D我设置的点的5 英里内。如果是这样，它会在应用程序打开时发送警报，或者在应用程序关闭时发送通知。

有用的信息：

在我的项目中，我有 4 个 swift 文件：

Locations.swift持有CLLocationCoordinate2D点。

Utilities.swift包含一个简单的警报。

UserLocation.swift检索并更新用户的位置

GeoLocationViewController.swift监控位置

笔记：

某些代码可能不在正确的位置或不相关，我正在查看另一个项目，试图从中提取相关代码以在我的项目中使用。请告诉我你是否发现了错误。

代码：

Locations.swift：

import UIKit
import MapKit

class Locations: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        var radius: CLLocationDistance = 5        
        let arroyo = CLLocationCoordinate2D (latitude: 33.781327997137595, longitude: -116.46394436519012)
        var arroyoCoord: CLLocationCoordinate2D = arroyo

        let buddyrogers = CLLocationCoordinate2D (latitude: 33.78051204742721, longitude: -116.46362250010833)
        var buddyCoord: CLLocationCoordinate2D = buddyrogers

        let chopsticks = CLLocationCoordinate2D (latitude: 33.815995425565184, longitude: -116.44107442645873)
        let colorfulfountain = CLLocationCoordinate2D (latitude: 33.80443304398751, longitude: -116.45723923544313)
        let diamond = CLLocationCoordinate2D (latitude: 33.80216859530781, longitude: -116.45711048941041)
        let dinahshore = CLLocationCoordinate2D (latitude: 33.806554795852996, longitude: -116.47734507421876)
        let fountoflife = CLLocationCoordinate2D (latitude: 33.78075282028137, longitude: -116.46407847564086)
        let fountains = CLLocationCoordinate2D (latitude: 33.780141969313235, longitude: -116.46346156756744)
        let historicphoto = CLLocationCoordinate2D (latitude: 33.78130570353292, longitude: -116.46389072100982)
        let holistic = CLLocationCoordinate2D (latitude: 33.781338029257775, longitude: -116.46408249895438)
        let hollywoodheroes = CLLocationCoordinate2D (latitude: 33.78095792254918, longitude: -116.45820483068849)
        let indiangathering = CLLocationCoordinate2D (latitude: 33.78136366689296, longitude: -116.46371905963287)
        let indianwomen = CLLocationCoordinate2D (latitude: 33.78622660767695, longitude: -116.45820483068849)
        let cathedrals = CLLocationCoordinate2D (latitude: 33.844502990031124, longitude: -116.45834321534426)
        let firehouse = CLLocationCoordinate2D (latitude: 33.78103817982461, longitude: -116.46700744788512)
        let perfectunion = CLLocationCoordinate2D (latitude: 33.778193459376865, longitude: -116.45877843062743)
        let lizards = CLLocationCoordinate2D (latitude: 33.78104263855992, longitude: -116.46340792338714)
        let cactus = CLLocationCoordinate2D (latitude: 33.782598723009976, longitude: -116.46699671904906)
        let swisscheese = CLLocationCoordinate2D (latitude: 33.78121541437478, longitude: -116.46472086469993)
        let newbeginning = CLLocationCoordinate2D (latitude: 33.78049421237406, longitude: -116.46463101069793)
        let thunderbolt = CLLocationCoordinate2D (latitude: 33.80140187863324, longitude: -116.46646603445436)
        let tictoc = CLLocationCoordinate2D (latitude: 33.80156235478469, longitude: -116.45524367193605)
        let wheeloftime = CLLocationCoordinate2D (latitude: 33.815987530910135, longitude: -116.45892863433227)         
        let artevita = CLLocationCoordinate2D (latitude: 33.7826633, longitude: -116.46041969999999)
        let coachellaart = CLLocationCoordinate2D (latitude: 33.78012700000001, longitude: -116.46571840000001)
        let colinfisher = CLLocationCoordinate2D (latitude: 33.7819228, longitude: -116.46002010000001)
        let garycreative = CLLocationCoordinate2D (latitude: 33.782660, longitude: -116.462141)
        let lesliejean = CLLocationCoordinate2D (latitude: 33.78404799999999, longitude: -116.4635222)
        let rebeccafine = CLLocationCoordinate2D (latitude: 33.782487, longitude: -116.460564)        
        let agnes = CLLocationCoordinate2D (latitude: 33.77571242620008, longitude: -116.46372063254091)
       let willardprice = CLLocationCoordinate2D (latitude: 33.77489419346815, longitude: -116.46667910908434)
       let adobe = CLLocationCoordinate2D (latitude: 33.77479870632753, longitude: -116.46673050629039)
        let valsamuelson = CLLocationCoordinate2D (latitude: 33.76802162366799, longitude: -116.46920998147584)
        let gallito = CLLocationCoordinate2D (latitude: 33.7794358, longitude: -116.4612692)        
        let townsquare = CLLocationCoordinate2D (latitude: 33.7810365, longitude: -116.46464559999998)
        let ocotillo = CLLocationCoordinate2D (latitude: 33.805963, longitude: -116.46349980000002)
        let century = CLLocationCoordinate2D (latitude: 33.8269913, longitude: -116.4424588)
        let denniskeat = CLLocationCoordinate2D (latitude: 33.8304982, longitude: -116.45744730000001)
        let memorial = CLLocationCoordinate2D (latitude: 33.78318512716751, longitude: -116.46681405767208)
        let patriot = CLLocationCoordinate2D (latitude: 33.8019902897174, longitude: -116.44000872473146)
        let panorama = CLLocationCoordinate2D (latitude: 33.83861734636407, longitude: -116.46799619895023)
        let secondst = CLLocationCoordinate2D (latitude: 33.78069442561766, longitude: -116.45910418200071)
        let dogpark = CLLocationCoordinate2D (latitude: 33.7804269, longitude: -116.46041309999998)


    }

}

Utilities.swift：

import UIKit
import MapKit

func showSimpleAlertWithTitle(title: String!, message: String, viewController: UIViewController) {
    let alert = UIAlertController(title: title, message: message, preferredStyle: .Alert)
    let action = UIAlertAction(title: "OK", style: .Cancel, handler: nil)
    alert.addAction(action)
    viewController.presentViewController(alert, animated: true, completion: nil)
}

UserLocation.swift：

import UIKit
import CoreLocation

class UserLocation: UIViewController, CLLocationManagerDelegate {
    var locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()

        if (CLLocationManager.locationServicesEnabled()) {
            locationManager = CLLocationManager()
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyBest
            locationManager.requestAlwaysAuthorization()
            locationManager.startUpdatingLocation()
        }

        locationManager.delegate = self
        locationManager.requestAlwaysAuthorization()

    }

}

GeoLocationViewController.swift：

import UIKit
import CoreLocation

class GeoLocationViewController: UIViewController, CLLocationManagerDelegate {

    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()

        locationManager.delegate = self
        locationManager.requestAlwaysAuthorization()

        // Do any additional setup after loading the view.
    }

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

    func regionWithGeotification(geotification: Locations) -> CLCircularRegion {
        // 1
        let region = CLCircularRegion(center: geotification.coordinate, radius: geotification.radius, identifier: geotification.identifier)
        // 2
        region.notifyOnEntry = (geotification.eventType == .OnEntry)
        region.notifyOnExit = !region.notifyOnEntry
        return region
    }

    func startMonitoringGeotification(geotification: Locations) {
        // 1
        if !CLLocationManager.isMonitoringAvailableForClass(CLCircularRegion) {
            showSimpleAlertWithTitle("Error", message: "Geofencing is not supported on this device!", viewController: self)
            return
        }
        // 2
        if CLLocationManager.authorizationStatus() != .AuthorizedAlways {
            showSimpleAlertWithTitle("Warning", message: "Your geotification is saved but will only be activated once you grant permission to access the device location.", viewController: self)
        }
        // 3
        let region = regionWithGeotification(geotification)
        // 4
        locationManager.startMonitoringForRegion(region)
    }

    func stopMonitoringGeotification(geotification: Locations) {
        for region in locationManager.monitoredRegions {
            if let circularRegion = region as? CLCircularRegion {
                if circularRegion.identifier ==  geotification.identifier {
                    locationManager.stopMonitoringForRegion(circularRegion)
                }
            }
        }
    }

    func locationManager(manager: CLLocationManager, monitoringDidFailForRegion region: CLRegion?, withError error: NSError) {
        print("Monitoring failed for region with identifier: \(region!.identifier)")
    }

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
        print("Location Manager failed with the following error: \(error)")
    }

}

Answer 1

首先也是最重要的，改回startMonitoringGeotification()、regionWithGeotification()、 并stopMonitoringGeotification()学习GeotificationRay Wenderlich 教程。确保您已将文件Geotification.swift从他的起始代码添加到您的项目中。

另外，请确保您的Main.storyboard启动您的ViewController. 如果没有这一步，您的代码将无法运行。

1）在Locations.swiftLocations中更简单地重新定义您的类：

import UIKit
import MapKit

class Locations {

  static let locations:[String:CLLocationCoordinate2D] = [
    "buddyrogers" : CLLocationCoordinate2D(latitude: 33.815995425565184, longitude: -116.44107442645873),
    "diamond"     : CLLocationCoordinate2D(latitude: 33.802168595307814, longitude: -116.45711048941041),
     . 
     .    // add your locations
     .
    ]
  }
}

就像@hungry-yeti 建议的那样

showSimpleAlertWithTitle()2）您可以在您的班级中定义GeotificationViewController。尝试在您的中调用它ViewDidLoad()来测试它。您现在可以删除Utilities.swift。

3）我认为你可以忽略/删除UserLocation.swift，这似乎没有必要

4）将此代码放入GeotificationViewController's中ViewDidLoad：

let radius = CLLocationDistance(8046.72) // 5 miles in meters

for location in Locations.locations {
  let g = Geotification(coordinate: location.1, radius: radius, identifier: location.0, note: "test", eventType: EventType.OnEntry)
    startMonitoringGeotification(g)
}

5）我希望这对您有所帮助并简化您的代码。聚会吧，如果有任何问题请在这里回复。