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，

由于未捕获的异常终止应用<＆strong> GMSThreadException ＆＃39;，原因：＆＃39;所有对iOS版Google地图SDK的调用都必须来自UI线程＆＃39 ;

仅供参考vwGogle地图是全球性的，我试图绘制标记。

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
}

任何帮助将不胜感激，

TIA。

Answer 1

在闭包中执行 UI更新（在我的情况下 - 绘制标记）时，请记住仅在主线程上获取主线程并执行UI操作。

错误我所做的是，我正在尝试在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
}

希望这对某人有帮助！

Answer 2

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

必须使用location

设置CLLocationCoordinate2D属性

要创建一个新的locationcoordinate，请使用：

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

这很简单.. 确保通过执行

来初始化地图

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
}

如何在swift中为ios的谷歌地图sdk添加地图视图的标记

4 个答案: