缩小标记时，在Swift 4中更改位置

Question

我也尝试过地面覆盖，但是它不起作用

我没有找到任何解决方案，请帮忙。 有人知道解决方案吗？

for state in self.asset {

    let state_marker = GMSMarker()

    self.appTitle = state.appName    
    if state.appName == "AssetHistory"{
        path.add(CLLocationCoordinate2D(latitude: CLLocationDegrees(state.Latitude), longitude: CLLocationDegrees(state.Longitude)))
        bounds = GMSCoordinateBounds(path: path)
        if self.asset.first?.Latitude as CGFloat! == state.Latitude && self.asset.first?.Longitude as CGFloat! == state.Longitude
        {
            state_marker.position = CLLocationCoordinate2D(latitude: CLLocationDegrees(state.Latitude), longitude: CLLocationDegrees(state.Longitude))
            state_marker.icon = UIImage(named: "arrow_blue")
            state_marker.title = "Start"
            bounds = bounds.includingCoordinate(state_marker.position)
        }
        if self.asset.last?.Latitude as CGFloat! == state.Latitude && self.asset.last?.Longitude as CGFloat! == state.Longitude
        {
            state_marker.position = CLLocationCoordinate2D(latitude: CLLocationDegrees(state.Latitude), longitude: CLLocationDegrees(state.Longitude))            
            state_marker.icon = UIImage(named: "arrow_red")
            state_marker.title = "End"
            bounds = bounds.includingCoordinate(state_marker.position)
        }
    }else{
        path.removeAllCoordinates()
        state_marker.position = CLLocationCoordinate2D(latitude: CLLocationDegrees(state.Latitude), longitude: CLLocationDegrees(state.Longitude))
        let im = UIImage(named: state.Direction)
        state_marker.icon = self.imageWithImage(image: im!, scaledToSize: CGSize(width: 100.0, height: 100.0))
        state_marker.title = "\(state.AssetName)"
        bounds = bounds.includingCoordinate(state_marker.position)
    }
    state_marker.infoWindowAnchor = CGPoint(x: 0.5, y: 0.5)
    state_marker.tracksViewChanges = true
    state_marker.map = self.mapView
    state_marker.userData = state_marker.title    
}

Answer 1

简单。放大或缩小后，只需重新设置state_marker的坐标即可。 state_marker.position = CLLocationCoordinate2D(latitude: CLLocationDegrees(state.Latitude), longitude: CLLocationDegrees(state.Longitude))

Answer 2

问题出在您的标记groundAnchor上，地图正确绘制了标记，但是您应该根据其图像设置每个标记groundAnchor。

地锚指定图标图像中的点 锚定到地球表面上标记的位置。这点 在连续空间[0.0，1.0] x [0.0，1.0]中指定， 其中（0,0）是图像的左上角，而（1,1）是图像的左上角 右下角。如果图片的alignmentRectInsets不为零， 上面提到的左上和右下指的是插图 图片的一部分。