如何为 google 中的地图视图添加标记 maps sdk for ios in swift

Question

尝试向Google地图添加标记，但应用程序在addMarker()函数调用时崩溃，异常详情如下，

由于未捕获的异常“GMSThreadException”而终止应用程序，原因：'All calls to the Google Maps SDK for iOS must be made from the UI thread'

仅供参考 vwGogleMap 是全局的，在我试图绘制标记的函数中。

func addMarker() -> Void
{
    var vwGogleMap : GMSMapView?
    var position = CLLocationCoordinate2DMake(17.411647,78.435637)
    var marker = GMSMarker(position: position)
    marker.title = "Hello World"
    marker.map = vwGogleMap
}

如有任何帮助，我们将不胜感激，

TIA。

Answer 1

var marker = GMSMarker()
marker.location = location
marker.title = location.name
marker.snippet = "Info window text"
marker.map = mapView

location 属性必须设置 CLLocationCoordinate2D

要创建新的位置坐标，请使用：

 CLLocationCoordinate2D(latitude: CLLocationDegrees(<latitude>), longitude: CLLocationDegrees(<longitude>))

真的很简单.. 通过这样做确保您的地图已初始化

Answer 2

在闭包中执行UI更新时（在我的例子中-绘制标记），请记住获取主线程并执行UI 仅在主线程上运行。

我的错误是，我试图在 Web 服务完成块中绘制标记。

dispatch_async(dispatch_get_main_queue(),
{
    var position = CLLocationCoordinate2DMake(17.411647,78.435637)
    var marker = GMSMarker(position: position)
    marker.title = "Hello World"
    marker.map = vwGogleMap
})

// For swift 3.0 support.
// 1. Get Main thread
DispatchQueue.main.async
{
    // 2. Perform UI Operations.
    var position = CLLocationCoordinate2DMake(17.411647,78.435637)
    var marker = GMSMarker(position: position)
    marker.title = "Hello World"
    marker.map = vwGoogleMap
}

希望这对某人有所帮助！

Answer 3

    @IBOutlet weak var mapView: GMSMapView!
override func viewDidLoad() {
        super.viewDidLoad()

        mapView.camera = GMSCameraPosition.camera(withLatitude: 18.514043, longitude: 57.377796, zoom: 6.0)
        let marker = GMSMarker(position: CLLocationCoordinate2D(latitude: 18.514043, longitude: 57.377796))
        marker.title = "Lokaci Pvt. Ltd."
        marker.snippet = "Sec 132 Noida India"
        marker.map = mapView
    }

Answer 4

/// Marker - Google Place marker
let marker: GMSMarker = GMSMarker() // Allocating Marker

 marker.title = "Title" // Setting title
 marker.snippet = "Sub title" // Setting sub title
 marker.icon = UIImage(named: "") // Marker icon
 marker.appearAnimation = .pop // Appearing animation. default
 marker.position = location.coordinate // CLLocationCoordinate2D

DispatchQueue.main.async { // Setting marker on mapview in main thread.
   marker.map = mapView // Setting marker on Mapview
}

如何为 google 中的地图视图添加标记 maps sdk for ios in swift

How to add marker for a map view in google maps sdk for ios in swift

markers

ios

google-maps-sdk-ios

gmsmapview

swift