我们如何在 Swift 中使用 firebase 发送位置信息

Question

我想使用 firebase 发送位置信息。就像当用户单击按钮时，它会显示警报您要发送的消息，例如音频、视频、位置。当用户从给定选项中选择位置时，它将调用 locationViewController 并将位置存储在 firebase 中。我已经简单地加载了谷歌地图用标记针点并定义它的坐标不是动态的。 InputActionSheet func，当用户点击选择按钮时在 chatViewController 中定义此函数调用以及在另一个函数调用中将调用位置消息的功能。但我很困惑当用户在谷歌地图上的任何位置上点击时我们如何动态获取坐标和当用户点击时它也会显示标记。 用于检查谷歌地图功能的 SimpleViewController 类工作正常：

class ViewController: UIViewController {
    @IBOutlet weak var mapView: GMSMapView!
    let manager = CLLocationManager()
    let karachi = CLLocationCoordinate2D(latitude: 24.882752, longitude: 67.149848)
    let tandoAdam = CLLocationCoordinate2D(latitude: 25.76284, longitude: 68.66087)
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupMap(title: "Karachi", subtitle: "Shah Faisal", karachi)
        self.setupMap(title: "TDM", subtitle: "AK H", tandoAdam)
        self.mapView.mapStyle(name:"darkTheme", type:"json")
    }
    
    func setupMap(title:String,subtitle:String,_ coordinate:CLLocationCoordinate2D){
        manager.delegate = self
        manager.requestWhenInUseAuthorization()
        manager.startUpdatingLocation()
        let camera = GMSCameraPosition.camera(withLatitude: coordinate.latitude, longitude:  coordinate.longitude, zoom: 6.0)
        mapView.camera = camera
        mapView.camera = camera
        self.addMarker(title: title, subtitle: subtitle, coordinate:coordinate)
    }
    
    func addMarker(title:String,subtitle:String,coordinate:CLLocationCoordinate2D){
        let marker = GMSMarker()
        marker.icon = #imageLiteral(resourceName: "DiceFive")
        marker.position = coordinate
        marker.title = title
        marker.snippet = subtitle
        marker.map = mapView
    }

    
}
extension UIViewController : CLLocationManagerDelegate {
    public func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard locations.first != nil else{
            return
        }
    }

}

Chat 类中的presentInputActionSheet 函数：

private func presentInputActionSheet() {
        let actionSheet = UIAlertController(title: "Attach Media",
                                            message: "What would you like to attach?",
                                            preferredStyle: .actionSheet)
        actionSheet.addAction(UIAlertAction(title: "Photo", style: .default, handler: { [weak self] _ in
            self?.presentPhotoInputActionsheet()
        }))
        actionSheet.addAction(UIAlertAction(title: "Video", style: .default, handler: { [weak self]  _ in
            self?.presentVideoInputActionsheet()
        }))
        actionSheet.addAction(UIAlertAction(title: "Audio", style: .default, handler: {  _ in

        }))
        actionSheet.addAction(UIAlertAction(title: "Location", style: .default, handler: { [weak self]  _ in
            self?.presentLocationPicker()
        }))
        actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

        present(actionSheet, animated: true)
    }

Chat 类中的presentLocationPicker 函数：

private func presentLocationPicker() {
        let vc = ViewController(coordinates: nil)
        vc.title = "Pick Location"
        vc.navigationItem.largeTitleDisplayMode = .never
        let location = Location(location: CLLocation(latitude: latitude, longitude: longitude),
                                 size: .zero)
        let message = Message(sender: selfSender,messageId: messageId,sentDate: Date(),kind: .location(location))
            DatabaseManager.shared.sendMessage(to: conversationId, otherUserEmail: strongSelf.otherUserEmail, name: name, newMessage: message, completion: { success in
                if success {
                    print("sent location message")
                }
                else {
                    print("failed to send location message")
                }
            })
        }
        navigationController?.pushViewController(vc, animated: true)
    }

Answer 1

试试这个

 let message = Message(sender: selfSender,messageId: messageId,sentDate: Date(),kind: .location(location))
            DatabaseManager.shared.sendMessage(to: conversationId, otherUserEmail: strongSelf.otherUserEmail, name: name, newMessage: message, completion: { success in
                if success {
                    print("sent location message")
                }
                else {
                    print("failed to send location message")
                }
                navigationController?.pushViewController(vc, animated: true)
            })

        }