判断坐标点是否在范围内（高德Swift）

公司要做签到功能，稍稍研究了下高德的API写出下面一个类，以供大家使用。

使用前准备：
  1.导入高德SDK，建议Cocoapods导入

  2.稍微做一些配置
    在info.plist 中配置NSLocationWhenInUseUsageDescription为
YES

    <key>NSAppTransportSecurity</key>
    <dict>
        <key>NSAllowsArbitraryLoads</key>
        <true/>
    </dict>

  3.在桥接头中，导入以下两个头
    // 高德地图定位
    #import <AMapFoundationKit/AMapFoundationKit.h>
    #import <AMapLocationKit/AMapLocationKit.h>

import UIKit

typealias LocationJudgeCompletion = (isOnRegion: Bool?, formattedAddress: String?) -> Void

class SingleLocaiton: NSObject {
  // 定位管理器
  private var locationManager: AMapLocationManager!
  // 定位完成
  private var completionBlock: AMapLocatingCompletionBlock?
  // 判断完成
  private var judgeCompletion: LocationJudgeCompletion?
  // 圆形区域半径(默认500)
  internal var radius: CLLocationDistance = 500

  override init() {
    super.init()
    locationManager = AMapLocationManager()
    locationManager.delegate = self
    // 设置精准度为百米
    locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
    // 单次定位超时时间
    locationManager.locationTimeout = 6
    // 单次定位逆地理超时时间
    locationManager.reGeocodeTimeout = 3

  }
  /**
   通过定位获取的地理坐标来判断，当前位置是否在某区域中
   - parameter coordinate:        参考位置坐标
   - parameter judgeCompletion:   判断完成回调
   */
  func locAndJudgeAction(coordinate: CLLocationCoordinate2D, judgeCompletion: LocationJudgeCompletion) {
    // 根据值设置区域
    let cirRegion = AMapLocationCircleRegion(center: coordinate, radius: radius, identifier: "circleRegion")
    locationManager.requestLocationWithReGeocode(true) { (location, regeocode, error) in
      if error != nil {
        print("locError:{\(error.code)-\(error.localizedDescription)}")
        if error.code == AMapLocationErrorCode.LocateFailed.rawValue {
          return
        }
      }
      var isOnRegion: Bool? = nil
      var formattedAddress: String? = nil
      if location != nil {
        isOnRegion = cirRegion.containsCoordinate(location.coordinate)
      }
      if regeocode != nil {
        formattedAddress = regeocode.formattedAddress
      }
      judgeCompletion(isOnRegion: isOnRegion, formattedAddress: formattedAddress)
    }
  }

  deinit {
    // 停止位置更新
    locationManager.stopUpdatingLocation()
    locationManager.delegate = nil
    print("deinit...")
  }
}
extension SingleLocaiton: AMapLocationManagerDelegate {

}