可调整大小的 GMSCircle GoogleMaps SDK for iOS答案

【问题标题】：Resizable GMSCircle GoogleMaps SDK for iOS可调整大小的 GMSCircle GoogleMaps SDK for iOS
【发布时间】：2016-07-27 03:39:11
【问题描述】：

有什么方法可以调整 GMSCircle 对象的大小（缩小和扩大）？我创建了GMSCircle 并将其附加到我们的地图中

var cirlce: GMSCircle!

let camera = GMSCameraPosition.cameraWithLatitude(-33.86, longitude: 151.20, zoom: 6)
mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)

cirlce = GMSCircle(position: camera.target, radius: 100000)
cirlce.fillColor = UIColor.redColor().colorWithAlphaComponent(0.5)
cirlce.map = mapView

我想让circle 响应我的手势以调整大小并获取其圆的半径值。比如有一个网页版的here。

那么如何创建呢？任何帮助，将不胜感激。谢谢！

【问题讨论】：

嘿，你找到解决办法了吗？
@Apple 还没有找到任何解决方案，然后我只是为圆的半径值创建滑块。
是否可以在地图中移动和调整圆圈的大小？我对此表示怀疑..因为我仍然无法找到任何与之相关的解决方案。如果您有任何想法，那么我发布了一个问题stackoverflow.com/questions/40991640/…，请回复。
@SonicMaster 你能分享你的代码吗

标签： ios swift google-maps google-maps-sdk-ios gmsmapview

【解决方案1】：

 @IBOutlet weak var googleMaps: GMSMapView!
//Slider object to zoom in out the GMSCricle
 @IBOutlet weak var sliderer: UISlider!
 var cirlce: GMSCircle!
 var zoom: Float = 14.0
 var circleSliderZooming: Double = 1000
 var circleCenter = CLLocationCoordinate2D()
 var locationManager = CLLocationManager()


override func viewDidLoad() {
super.viewDidLoad()

locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.startMonitoringSignificantLocationChanges()

self.circleview(redius: 1000)

//Your map initiation code
let camera = GMSCameraPosition.camera(withLatitude: -7.9293122, longitude: 112.5879156, zoom: zoom)
self.googleMaps.camera = camera
self.googleMaps.delegate = self
self.googleMaps?.isMyLocationEnabled = true
self.googleMaps.settings.myLocationButton = true
self.googleMaps.settings.compassButton = true
self.googleMaps.settings.zoomGestures = true
}

func circleview(redius:Double) {
   circleCenter = CLLocationCoordinate2D(latitude: -7.9293122, longitude: 112.5879156)
   cirlce = GMSCircle(position: circleCenter, radius: redius)
   cirlce.fillColor = UIColor(red: 0, green: 0, blue: 0.3, alpha: 0.2)
   cirlce.strokeColor = .blue
   cirlce.strokeWidth = 2
   cirlce.map = googleMaps 
}

 func mapView(_ mapView: GMSMapView, didChange position: GMSCameraPosition) {
  cirlce.position = position.target
 }
 //This is the Slider function to zoom in and out by Slider on View Controller
 @IBAction func cricleZoom(_ sender: Any) {
  cirlce.radius = CLLocationDistance(sliderer.value)   
 }

【讨论】：

感谢动圈。