Question

每当我将地址搜索到谷歌地图并对其进行地理编码时，我的地图在第二次运行搜索之前不会添加标记。谁能告诉我为什么会这样？基本上我搜索一个地址，将其名称运行到第三方地理编码器中，并改变我在地图上创建的全局标记。这样我在地图上一次只有一个标记。出于某种原因，它从来没有在我第一次搜索地址时放置标记，我必须搜索另一个地址。奇怪的是，它不必是相同的地址，如果我输入另一个地址，它只会改变标记的标题，放在我原本想要去的地方。

我的代码：

extension EventCreatorVC: GMSAutocompleteResultsViewControllerDelegate {
func resultsController(_ resultsController: GMSAutocompleteResultsViewController,
                       didAutocompleteWith place: GMSPlace) {
    searchController?.isActive = false
    // Do something with the selected place.
    print("Place name: \(place.name)")
    print("Place address: \(place.formattedAddress)")
    print("Place attributions: \(place.attributions)")

    Nominatim.getLocation(fromAddress: place.name, completion: {(error, location) -> Void in

        let latitude = (location!.latitude as NSString).doubleValue
        let longitude = (location!.longitude as NSString).doubleValue

        self.locationOfMarker =  CLLocationCoordinate2D(latitude: latitude, longitude: longitude)

    })

    markerPlace(locationOfMarker: locationOfMarker, name: place.name)

}

func markerPlace(locationOfMarker: CLLocationCoordinate2D, name: String) {
    marker.position = locationOfMarker
    marker.title = name


}

func resultsController(_ resultsController: GMSAutocompleteResultsViewController,
                       didFailAutocompleteWithError error: Error){
    // TODO: handle the error.
    print("Error: ", error.localizedDescription)
}

// Turn the network activity indicator on and off again.
func didRequestAutocompletePredictions(forResultsController resultsController: GMSAutocompleteResultsViewController) {
    UIApplication.shared.isNetworkActivityIndicatorVisible = true
}

func didUpdateAutocompletePredictions(forResultsController resultsController: GMSAutocompleteResultsViewController) {
    UIApplication.shared.isNetworkActivityIndicatorVisible = false
}
}

Answer 1

现在你的问题就像你的竞争部分需要一些时间才能完成。因此，我将此更改延迟到您的代码

Nominatim.getLocation(fromAddress: place.name, completion: {(error, location) -> Void in

                let latitude = (location!.latitude as NSString).doubleValue
                let longitude = (location!.longitude as NSString).doubleValue

                self.locationOfMarker =  CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
                let delayTime = DispatchTime.now() + Double(Int64(0.5 * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC)
                DispatchQueue.main.asyncAfter(deadline: delayTime)
                {
                    self.markerPlace(locationOfMarker: self.locationOfMarker, name: "")
                    self.mapView.animate(toLocation: self.locationOfMarker)
              }
        })

根据我的改变方法确定它将解决您的问题。
感谢您的支持

Swift上的地理编码标记

1 个答案: