swift 3 google maps - 如何更新地图上的标记

Posted 2023-03-14

【中文标题】swift 3 google maps - 如何更新地图上的标记

【英文标题】：swift 3 google maps - how to update marker on the map

【发布时间】：2017-06-30 13:37:26

【问题描述】：

我正在使用谷歌地图

这是我的代码：

import UIKit
import GoogleMaps

 class ViewController: UIViewController 

@IBAction func pressed(_ sender: Any) 

    //self.myMapView.marker.position = CLLocationCoordinate2D(latitude: +31.75097956, longitude: +35.23694378)






@IBOutlet weak var myMapView: GMSMapView!


override func viewDidLoad() 
    super.viewDidLoad()


    let camera = GMSCameraPosition.camera(withLatitude: +31.75097946, longitude: +35.23694368, zoom: 17.0)
    self.myMapView.mapType =  .terrain
    self.myMapView.camera = camera
    // Creates a marker in the center of the map.
    let marker = GMSMarker()
    marker.position = CLLocationCoordinate2D(latitude: +31.75097946, longitude: +35.23694368)
    marker.title = "some text"
    marker.map = self.myMapView
    marker.opacity = 1.0

有一个 UIView 可以在其中加载地图。还有一个按钮。 按下按钮时，我想更新标记的位置。

谢谢

【问题讨论】：

您要更新您在viewDidLoad() 上添加的标记位置吗？

是的。没错

【参考方案1】：

创建marker 作为类变量。并且按钮点击功能添加如下代码

import UIKit
import GoogleMaps

class ViewController: UIViewController 


@IBOutlet weak var myMapView: GMSMapView!
var marker: GMSMarker!


override func viewDidLoad() 
    super.viewDidLoad()


    let camera = GMSCameraPosition.camera(withLatitude: +31.75097946, longitude: +35.23694368, zoom: 17.0)
    self.myMapView.mapType =  .terrain
    self.myMapView.camera = camera
    // Creates a marker in the center of the map.
    marker = GMSMarker()
    marker.position = CLLocationCoordinate2D(latitude: +31.75097946, longitude: +35.23694368)
    marker.title = "some text"
    marker.map = self.myMapView
    marker.opacity = 1.0



@IBAction func pressed(_ sender: Any) 

    //New location coordinate 
     marker.position = CLLocationCoordinate2D(latitude: -1.75097946, longitude: +15.23694368)

     let camera = GMSCameraPosition.camera(withTarget: marker.position, zoom: 17.0)
     mapView.camera = camera