How to achieve this in iOS (fast)?

Question

I am a beginner programmer.

I am developing a Google Maps application and with the click of a button, I would like all processed coordinates (I already have) to stop recording, and instead start filling out new arrays. This is necessary to save the coordinates for the map.

What would be the best way?

func mapView(_ mapView: GMSMapView, didTapAt coordinate: CLLocationCoordinate2D){
    var lat: CLLocationDegrees = coordinate.latitude
    var lng: CLLocationDegrees = coordinate.longitude
    var formattedCoordinate = CLLocationCoordinate2D(latitude: lat,longitude: lng)
    markersArray.append(formattedCoordinate)
    mapView.clear()
    addMarker()
    drawPolygon()
}

func mapView(_ mapView: GMSMapView, didTap marker: GMSMarker) -> Bool {
    var lat: CLLocationDegrees = marker.position.latitude
    var lng: CLLocationDegrees = marker.position.longitude
    var formattedCoordinate = CLLocationCoordinate2D(latitude: lat,longitude: lng)
    markersArray = markersArray.filter({ !(($0.latitude == formattedCoordinate.latitude) && ($0.longitude == formattedCoordinate.longitude)) })
    mapView.clear()
    drawPolygon()
    addMarker()
    return true
}

func mapView(_ mapView: GMSMapView, didBeginDragging marker: GMSMarker){
    var lat: CLLocationDegrees = marker.position.latitude
    var lng: CLLocationDegrees = marker.position.longitude
    var formattedCoordinate = CLLocationCoordinate2D(latitude: lat,longitude: lng)
    markersArray = markersArray.filter({ !(($0.latitude == formattedCoordinate.latitude) && ($0.longitude == formattedCoordinate.longitude))})
}

func mapView(_ mapView: GMSMapView, didDrag marker: GMSMarker){
    var lat: CLLocationDegrees = marker.position.latitude
    var lng: CLLocationDegrees = marker.position.longitude
    var formattedCoordinate = CLLocationCoordinate2D(latitude: lat,longitude: lng)
    markersArray.append(formattedCoordinate)
    mapView.clear()
    drawPolygon()
    addMarker()
    markersArray = markersArray.filter({ !(($0.latitude == formattedCoordinate.latitude) && ($0.longitude == formattedCoordinate.longitude))})
    }

func mapView(_ mapView: GMSMapView, didEndDragging marker: GMSMarker){
    var lat: CLLocationDegrees = marker.position.latitude
    var lng: CLLocationDegrees = marker.position.longitude
    var formattedCoordinate = CLLocationCoordinate2D(latitude: lat,longitude: lng)
    markersArray.append(formattedCoordinate)
    mapView.clear()
    drawPolygon()
    addMarker()
    }

func addMarker(){
    for coordinate in markersArray {
        let marker = GMSMarker()
        marker.position = coordinate
        marker.map = mapView
        marker.isDraggable = true
        marker.icon = GMSMarker.markerImage(with: UIColor.blue)
    }
}

func drawPolygon(){
    let path = GMSMutablePath()
    var i = 0
    // get path for polygon
    for coordinate in markersArray {
        path.add(coordinate)
        i = i+1
    }
    // build polygon
    let polygon = GMSPolygon(path:path)
    polygon.map = nil;//not sure if this line is redundant
    polygon.fillColor = UIColor.green
    polygon.strokeColor = UIColor.black
    polygon.strokeWidth = 1
    polygon.map = mapView
}

Answer 1

I assume you have somewhere in your code:

var markersArray = [CLLocationCoordinate2D]()

which defines your array of coordinates.

Your code adds points to this array as follows:

markersArray.append(formattedCoordinate)

If you want to keep coordinate “sets”, add this when you define your Array markers:

var arrayOfMarkersArrays = Array<Array<CLLocationCoordinate2D>>()

Then, by clicking the button, you can do this:

// add the current array of points to the "array of arrays"
arrayOfMarkersArrays.append(markersArray)

// "reset" your tracking array
markersArray.removeAll()

""... " "... :

// get the first "set" of coordinates
markersArray = arrayOfMarkersArrays[0]

Answer 2

for

for point in points {
   // This will loop through all the points and add them to pointsArray
   pointsArray.append(point)
}