How to decode the Google Directions API polylines field into lat long points in Objective-C for iPhone?

Question

I want to draw routes on a map corresponding to directions JSON which I am getting through the Google Directions API: https://developers.google.com/maps/documentation/direct

Answer 1

Swift 4.2 / Swift 5

let gmsPolyline = GMSPolyline(path: GMSPath(fromEncodedPath: encodedPolyline))
gmsPolyline.map = map