如何删除 Traveled Polyline Google Maps SDK IOS答案

【问题标题】：how to remove Traveled Polyline Google Maps SDK IOS如何删除 Traveled Polyline Google Maps SDK IOS
【发布时间】：2020-07-31 12:44:36
【问题描述】：

我只想删除用户在路线上通过的折线

这些方法用于绘制运行平稳的折线

func drawPolygon(from source: CLLocationCoordinate2D, to destination: CLLocationCoordinate2D){
googleMaps.isHidden = false
guard let url = URL(string: "https://maps.googleapis.com/maps/api/directions/json?origin=\(source.latitude),\(source.longitude)&destination=\(destination.latitude),\(destination.longitude)&sensor=false&mode=driving&key=KEYHERE") else {
    return
}

URLSession.shared.dataTask(with: url, completionHandler: {(data, response, error) in
    if(error != nil){
        print("error")
    }else{
        do{
            let json = try JSONSerialization.jsonObject(with: data!, options:.allowFragments) as! [String : AnyObject]
            if json["status"] as! String == "OK"{
                let routes = json["routes"] as! [[String:AnyObject]]
                OperationQueue.main.addOperation({
                    for route in routes{
                        let routeOverviewPolyline = route["overview_polyline"] as! [String:String]
                        let points = routeOverviewPolyline["points"]
                        self.path = GMSPath.init(fromEncodedPath: points!)!
                        let polyline = GMSPolyline(path: self.path)
                        self.drawPath(polyline: polyline)
                    }
                })
            }
        }catch let error as NSError{
            print(error)
        }
    }
}).resume()
}

private func drawPath(polyline : GMSPolyline){

//DispatchQueue.main.async {
    
    polyline.strokeWidth = 6.0
    polyline.strokeColor = #colorLiteral(red: 0, green: 0.8465872407, blue: 0.7545004487, alpha: 1)
    polyline.map = self.googleMaps
    self.addMarker()
    // let bounds = GMSCoordinateBounds(path: path)
    // self.googleMaps.animate(with: GMSCameraUpdate.fit(bounds, withPadding: 50.0))
    let bounds = GMSCoordinateBounds(coordinate: self.fromLoc!, coordinate: self.toLoc!)
    let update = GMSCameraUpdate.fit(bounds, with: UIEdgeInsets(top: 170, left: 30, bottom: 30, right: 30))
    self.googleMaps.animate(with: GMSCameraUpdate.fit(bounds, withPadding: 20.0))
    self.googleMaps.animate(toZoom: 10)
    self.googleMaps.animate(toViewingAngle: 30)
    self.googleMaps!.moveCamera(update)
  self.timer = Timer.scheduledTimer(timeInterval: 0.003, target: self, selector: #selector(animatePolylinePath), userInfo: nil, repeats: true)
    
//}}

路线和折线运行良好。当用户通过路线上的线以获得更好的体验时，我正在考虑删除折线。我正在使用 Swift 5，想知道是否有人可以告诉我这是否可行以及如何实现？

【问题讨论】：

标签： ios swift maps

【解决方案1】：

我正在回答我自己的问题我解决了这个问题看看我在另一个帖子上的回答

How to remove the tracked polyline in Google map

【讨论】：