Question

我想按照以下步骤添加自定义标记。我在谷歌地图上有用于标记的方法，但是我想按照以下方法将用户图像放在标记针上。 我有透明的标记图像，我想从URL加载用户图像。因此，图像必须动态。所以我不能放置静态标记。

//Add Marker
    func dropMarker(_ location : CLLocation, _ isHotelLocation: Bool = false,_ memberModel : membersModel? = nil){

        let marker = GMSMarker()
        let position =  self.checkIfMutlipleCoordinates(latitude: Float(location.coordinate.latitude), longitude: Float(location.coordinate.longitude))
        marker.position = position

        if isHotelLocation == false{
            if let url = URL.init(string: memberModel!.avatar_url ?? ""){
                let imageView = UIImageView(image: UIImage.init(named: "locationPin"))
                imageView.sd_setImage(with: url, placeholderImage: UIImage.init(named: "locationPin"))
                marker.iconView = imageView
            }else{
                marker.icon = UIImage(named : "LocationPlaceholderPin")
            }

            marker.userData = memberModel
        }else{
            marker.icon = UIImage(named : "hotelMarker")
            hotelLocationMarker = marker
        }

        marker.map = mapView
        arrMarkers.append(marker)
    }

Answer 1

使用此扩展程序从服务器下载图像：

extension UIImageView {
    func downloaded(from url: URL, contentMode mode: UIViewContentMode = .scaleAspectFit) {  // for swift 4.2 syntax just use ===> mode: UIView.ContentMode
        contentMode = mode
        URLSession.shared.dataTask(with: url) { data, response, error in
            guard
                let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
                let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
                let data = data, error == nil,
                let image = UIImage(data: data)
                else { return }
            DispatchQueue.main.async() {
                self.image = image
            }
        }.resume()
    }
    func downloaded(from link: String, contentMode mode: UIViewContentMode = .scaleAspectFit) {  // for swift 4.2 syntax just use ===> mode: UIView.ContentMode
        guard let url = URL(string: link) else { return }
        downloaded(from: url, contentMode: mode)
    }
}

然后将图像作为子视图添加到标记图像：

var userImage = UIImageView()
userImage.downloaded(from: "user image url")
let userMarkerImage = UIImageView(named: "your marker placeholder")
userMarkerImage.addsubView(userImage)

然后将图像设置为标记：

marker.icon = userMarkerImage

注意

在添加为子视图之前，应先设置图像的框架

谷歌地图上的自定义标记，如下图所示

1 个答案: