ios - 点击时更改 map 叠加层的笔触颜色

Question

我有一个 map View ，并且正在生成一堆 mkcircle 叠加层。它们具有描边宽度和填充颜色。

我还设置了一个点击手势，用于确定点击是否在其中一个 mkcircles 上。我现在想做的是更改描边宽度和填充颜色，以便用户知道点击了哪个 mkcircle，然后在任何其他点击时将其改回。

我的代码如下。

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
    let circleRenderer = MKCircleRenderer(overlay: overlay)
    circleRenderer.fillColor = UIColor.blue.withAlphaComponent(0.1)
    circleRenderer.strokeColor = UIColor.blue
    circleRenderer.lineWidth = 2
    return circleRenderer
}

func handleMapTap(_ gestureReconizer: UITapGestureRecognizer) {
    let tapPoint = gestureReconizer.location(in: mapView)
    let tapCoordinate = mapView.convert(tapPoint, toCoordinateFrom: mapView)
    let point = MKMapPointForCoordinate(tapCoordinate)
    if mapView.overlays.count > 0 {
        for overlay: MKOverlay in polygonArray {
            if (overlay is MKCircle) {
                let circle = overlay
                let circleRenderer = (mapView.renderer(for: circle) as! MKCircleRenderer)
                let datapoint = circleRenderer.point(for: point)
                circleRenderer.invalidatePath()

                if circleRenderer.path.contains(datapoint) {

                    let circleIndex = polygonArray.index{$0 === circle}!
                    print(circleIndex)
                }
            }
        }
    }
}

我已经做了一些搜索，但我还没有找到解决方案。我能够获得点击圆的 circleIndex。

感谢任何指导。

Answer 1

以防万一其他人在这里遇到这个问题，这是最终实际上非常简单的答案。

func handleMapTap(_ gestureReconizer: UITapGestureRecognizer) {
    let tapPoint = gestureReconizer.location(in: mapView)
    let tapCoordinate = mapView.convert(tapPoint, toCoordinateFrom: mapView)
    let point = MKMapPointForCoordinate(tapCoordinate)
    if mapView.overlays.count > 0 {
        for overlay: MKOverlay in polygonArray {
            if (overlay is MKCircle) {
                let circle = overlay
                let circleRenderer = (mapView.renderer(for: circle) as! MKCircleRenderer)
                let datapoint = circleRenderer.point(for: point)
                circleRenderer.invalidatePath()

                circleRenderer.fillColor = UIColor.blue.withAlphaComponent(0.1)
                circleRenderer.strokeColor = UIColor.blue

                if circleRenderer.path.contains(datapoint) {

                    circleRenderer.fillColor = UIColor.black
                    circleRenderer.strokeColor = UIColor.black
                    let circleIndex = polygonArray.index{$0 === circle}!
                    print(circleIndex)
                }
            }
        }
    }
}