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标题: ios - 在谷歌地图上画虚线圆 : iOS [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-13 15:30
标题: ios - 在谷歌地图上画虚线圆 : iOS

I've been trying so hard to Draw a Dashed Circle on Google Maps but couldn't find anything helping...

几天来，我一直在网上寻找一些在 GoogleMaps 上绘制虚线圆圈的解决方案，不幸的是，除了绘制一个普通的圆圈之外，我每次都能得到答案。

这就是我所做的:

上面的代码是:

import UIKit
import GoogleMaps
import GooglePlaces

class ViewController: UIViewController
{
    @IBOutlet weak var gmsMapView: GMSMapView!

    override func viewDidLoad()
    {
        super.viewDidLoad()

        gmsMapView.isMyLocationEnabled = true
        gmsMapView.settings.myLocationButton = true
        gmsMapView.animate(toZoom: 10.0)
        gmsMapView.animate(toLocation: CLLocationCoordinate2D(latitude: 40.709677, longitude: -74.011088))
        let circleCenter = CLLocationCoordinate2D(latitude: 40.709677, longitude: -74.011088)
        let circle = GMSCircle(position: circleCenter, radius: 5000)
        circle.strokeWidth = 2
        circle.strokeColor = UIColor.blue
        circle.map = gmsMapView
    }

    override func didReceiveMemoryWarning(){
        super.didReceiveMemoryWarning()
    }
}

这是必需的:

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Best Answer-推荐答案

使用 GMSCircle 是不可能的，您必须基于圆绘制折线。

使用 GMSGeometryOffset，您可以生成您所在位置的偏移量。 360/6 = 60，细节更少，效率更高。

let path = GMSMutablePath()

for i in 0...60 {
    let offsetLocation = GMSGeometryOffset(location.coordinate, circleRadius, CLLocationDirection(i*6))
    path.add(offsetLocation)
}
let length: [NSNumber] = [10, 10]
let circle = GMSPolyline(path: path)
let styles = [GMSStrokeStyle.solidColor(.clear), GMSStrokeStyle.solidColor(.red)]

circle.spans = GMSStyleSpans(circle.path!, styles, length, GMSLengthKind.rhumb)
circle.strokeWidth = 1.0
circle.map = mapView

关于ios - 在谷歌地图上画虚线圆 : iOS，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44886053/

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