我刚刚更新到Xcode 9和Swift 4，它已经破坏了我的很多功能。其中之一就是我如何获得用户的位置，在启动时放大它，检测注释选择和各种其他任务。它们根本不起作用。我的视图控制器类代码如下。
import UIKit
import MapKit
import Firebase
import FirebaseDatabase
import Pulley
import CoreLocation
class ChildMapViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
@IBOutlet weak var mapView: MKMapView!
let manager = CLLocationManager()
var isInitialized = false
func startBackgroundLocationUpdates() {
self.manager.delegate = self
manager.requestWhenInUseAuthorization()
manager.desiredAccuracy = kCLLocationAccuracyThreeKilometers
manager.pausesLocationUpdatesAutomatically = true
manager.activityType = .fitness
manager.allowsBackgroundLocationUpdates = true
manager.startMonitoringSignificantLocationChanges()
manager.startUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations[0]
if !isInitialized {
isInitialized = true
let span:MKCoordinateSpan = MKCoordinateSpanMake(0.01, 0.01)
let myLocation:CLLocationCoordinate2D = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
let region:MKCoordinateRegion = MKCoordinateRegionMake(myLocation, span)
mapView.setRegion(region, animated: true)
self.mapView.showsUserLocation = true
}
}
struct loc {
let title: String
let latitude: Double
let longitude: Double
}
var locs = [
loc(title: "New York, NY", latitude: 40.713054, longitude: -74.007228),
]
func placeAnnotations() {
let annotations = locs.map { location -> MKAnnotation in
let annotation = MKPointAnnotation()
annotation.coordinate = CLLocationCoordinate2D(latitude: location.latitude, longitude: location.longitude)
annotation.title = location.title
return annotation
}
mapView.addAnnotations(annotations)
}
var position:PulleyPosition!
func mapView(_ didSelectmapView: MKMapView, didSelect view: MKAnnotationView) {
Shared.shared.annotation = view.annotation!
if Shared.shared.annotation is MKUserLocation {
Shared.shared.nameString = "My Location"
} else {
loadData()
}
}
func mapView(_ mapView: MKMapView, didDeselect view:
MKAnnotationView) {
let drawerContent = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "DrawerViewController")
if let drawer = self.parent?.parent as? PulleyViewController {
drawer.setDrawerContentViewController(controller: drawerContent, animated: false)
drawer.setDrawerPosition(position: PulleyPosition.partiallyRevealed, animated: true)
}
}
func loadData() {
let number = (Shared.shared.annotation?.title)!
if let number = number {
let ref = FIRDatabase.database().reference()
ref.child("safehouses").child("\(number)").observeSingleEvent(of: .value, with: { snapshot in
let snapDict = snapshot.value as? NSDictionary
let name = snapDict?["name"] as? String
let phone = snapDict?["phone"] as? String
let current = CLLocation(latitude: (self.manager.location?.coordinate.latitude)!, longitude: (self.manager.location?.coordinate.longitude)!)
let destination = CLLocation(latitude: Shared.shared.annotation.coordinate.latitude, longitude: Shared.shared.annotation.coordinate.longitude)
let distance2 = current.distance(from: destination)
let distance1 = round(distance2)
if distance1 >= 1000 {
if distance1 < 10000 {
let distance3 = distance1/1000
let distance = Double(round(10*distance3)/10)
Shared.shared.typeString = "Safehouse · " + String(distance) + " km"
} else {
let distance3 = distance1/1000
let distance = round(distance3)
Shared.shared.typeString = "Safehouse · " + String(distance) + " km"
}
} else {
let distance = self.forTailingZero(temp: distance1)
Shared.shared.typeString = "Safehouse · " + distance + " m"
}
if let name = name {
if let phone = phone {
Shared.shared.nameString = name
Shared.shared.phoneString = phone
let drawerContent = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "NewDrawerViewController")
if let drawer = self.parent?.parent as? PulleyViewController {
drawer.setDrawerContentViewController(controller: drawerContent, animated: false)
drawer.setDrawerPosition(position: PulleyPosition.partiallyRevealed, animated: true)
}
}
}
})
}
}
func forTailingZero(temp: Double) -> String{
var tempVar = String(format: "%g", temp)
return tempVar
}
func loop() {
let ref = FIRDatabase.database().reference()
ref.child("safehouses").observeSingleEvent(of: .value, with: { snapshot in
let snapDict = snapshot.value as? NSDictionary
let ii = snapDict?["number"] as? Int
let iii = Int(ii!)
var i = 1
while i <= iii{
let name = String(i)
ref.child("safehouses").child("\(i)").observeSingleEvent(of: .value, with: { snapshot in
let snapDict = snapshot.value as? NSDictionary
let longitude = snapDict?["longitude"]
as? String
let latitude = snapDict?["latitude"] as? String
if let longitude = longitude {
if let latitude = latitude {
let latitude1 = Double(latitude)
if let latitude1 = latitude1 {
let longitude1 = Double(longitude)
if let longitude1 = longitude1 {
self.locs.append(loc(title: name, latitude: latitude1, longitude: longitude1))
self.placeAnnotations()
}
}
}
}
})
i = i + 1
}
})
}
@IBOutlet weak var menuButton: UIBarButtonItem!
override func viewDidLoad() {
super.viewDidLoad()
self.revealViewController().rearViewRevealWidth = 175
self.revealViewController().toggleAnimationType = SWRevealToggleAnimationType.easeOut
if self.revealViewController() != nil {
menuButton.target = self.revealViewController()
menuButton.action = #selector(SWRevealViewController.revealToggle(_:))
self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
}
loop()
mapView.delegate = self
manager.delegate = self
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.requestAlwaysAuthorization()
Shared.shared.mapView = self.mapView
startBackgroundLocationUpdates()
}
}
final class Shared {
static let shared = Shared()
var nameString : String!
var phoneString : String!
var annotation : MKAnnotation!
var mapView : MKMapView!
var typeString : String!
}
答案 0 :(得分：1)
首先将这些属性添加到info.plist
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>description1</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>description2</string>
<key>NSLocationUsageDescription</key>
<string>description3</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>accept to get location</string>
<key>UIBackgroundModes</key>
然后在您的项目中复制此视图控制器
import UIKit
import CoreLocation
class ViewController: UIViewController,CLLocationManagerDelegate {
var locationManager:CLLocationManager!
override func viewDidLoad() {
super.viewDidLoad()
determineMyCurrentLocation()
// Do any additional setup after loading the view.
}
func determineMyCurrentLocation() {
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager!.allowsBackgroundLocationUpdates = true
locationManager!.pausesLocationUpdatesAutomatically = false
let value = locationManager.startMonitoringSignificantLocationChanges()
if CLLocationManager.locationServicesEnabled() {
locationManager.startUpdatingLocation()
}
}
func locationManager(_ manager: CLLocationManager, didStartMonitoringFor region: CLRegion) {
print("ankur :- \(region)")
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation:CLLocation = locations[0] as CLLocation
print("user latitude = \(userLocation.coordinate.latitude)")
print("user longitude = \(userLocation.coordinate.longitude)")
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error)
{
print("Error \(error)")
}
}
最后一步：-打开功能->在后台模式下->单击位置更新
如果有任何查询评论
答案 1 :(得分：0)
您需要在info plist中添加这些键：
<key>UIBackgroundModes</key>
<array>
<string>location</string>
</array>