Swift检测google地图上按下的标记

import UIKit
import GoogleMaps

class MapViewController: UIViewController, GMSMapViewDelegate {
    
    var mapView: GMSMapView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建地图视图
        let camera = GMSCameraPosition.camera(withLatitude: 37.7749, longitude: -122.4194, zoom: 12.0)
        mapView = GMSMapView.map(withFrame: view.bounds, camera: camera)
        mapView.delegate = self
        view.addSubview(mapView)
        
        // 添加标记
        let marker = GMSMarker()
        marker.position = CLLocationCoordinate2D(latitude: 37.7749, longitude: -122.4194)
        marker.title = "San Francisco"
        marker.map = mapView
    }
    
    // 监听标记点击事件
    func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {
        // 处理用户点击标记的操作
        print("用户点击了标记")
        return true
    }
}