ios - 在 ViewController 上获取初始化程序错误

Question

我收到错误消息:“类‘ViewController’没有初始化程序”。我已将问题缩小到正在调用的这个函数。有人看到问题了吗？

let locationManager1: CLLocationManager // your location manager
    func addBoundry(loc: CLLocation)
    {
        if let loc: CLLocation! = locationManager1.location {
        let center: CLLocationCoordinate2D = loc!.coordinate
        let lat: CLLocationDegrees = center.latitude
        let long: CLLocationDegrees = center.longitude
        var points = [CLLocationCoordinate2DMake(lat,long),CLLocationCoordinate2DMake(lat,long),CLLocationCoordinate2DMake(lat,long),CLLocationCoordinate2DMake(lat,long)]
        let polygon = MKPolygon(coordinates: &points, count: points.count)

        mapView.addOverlay(polygon)

        } else {
            print("no location...")
        }
    }

Answer 1

当分配属性时使用可选的。

 let locationManager1: CLLocationManager?