CLLocation 배열의 중심 좌표 점을 계산하십시오.

Question

여러 개의 CLLocation 점이있는 경우 MapView의 중심점을 계산하는 방법은 무엇입니까?

Answer 1

func zoomToFitPolyLine(pointsArr : NSArray) { 
    if (pointsArr.count == 0) { 
     return 
    } 
    var topLeftCoord : CLLocationCoordinate2D? = CLLocationCoordinate2DMake(-90, 180) 

    var bottomRightCoord : CLLocationCoordinate2D? = CLLocationCoordinate2DMake(90, -180) 

    for (index,_) in (pointsArr.enumerated()) { 

     let tempLoc : CLLocation? = pointsArr.object(at: index) as? CLLocation 

     topLeftCoord?.latitude = fmax((topLeftCoord?.latitude)!, (tempLoc?.coordinate.latitude)!) 
     topLeftCoord?.longitude = fmin((topLeftCoord?.longitude)!, (tempLoc?.coordinate.longitude)!) 

     bottomRightCoord?.latitude = fmin((bottomRightCoord?.latitude)!, (tempLoc?.coordinate.latitude)!) 
     bottomRightCoord?.longitude = fmax((bottomRightCoord?.longitude)!, (tempLoc?.coordinate.longitude)!) 
    } 

    var centerCoordinate : CLLocationCoordinate2D? = CLLocationCoordinate2DMake(0, 0) 

    centerCoordinate?.latitude = (topLeftCoord?.latitude)! - ((topLeftCoord?.latitude)! - (bottomRightCoord?.latitude)!) * 0.5; 
    centerCoordinate?.longitude = (topLeftCoord?.longitude)! + ((bottomRightCoord?.longitude)! - (topLeftCoord?.longitude)!) * 0.5; 
    self.zoomToRegion(location: centerCoordinate!) 
} 

func zoomToRegion(location:CLLocationCoordinate2D) 
{ 
    let camera : MKMapCamera = MKMapCamera.init(lookingAtCenter: location, fromEyeCoordinate: location, eyeAltitude: CLLocationDegrees(10)); 
    myMap?.setCamera(camera, animated: true); 
}