Snap to Roads in Swift

Question

I am trying to implement a method that uses Googles snap to roads API however I have been unable to achieve any results.

I was able to successfully implement the directions API in to my Swift project using

https://maps.googleapis.com/maps/api/directions/json?origin=xyz

let request = NSURLRequest(URL: NSURL(string:directionURL)!)
    let session = NSURLSession.sharedSession()
    session.dataTaskWithRequest(request,
        completionHandler: {(data: NSData!, response: NSURLResponse!, error: NSError!) in

            if error == nil {
                let object = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: nil) as! NSDictionary
                println(object)

                let routes = object["routes"] as! [NSDictionary]
                for route in routes {
                    println(route["summary"])
                }
                dispatch_async(dispatch_get_main_queue()) {
                    //update your UI here
                }
            }
            else {
                println("Direction API error")
            }

    }).resume()

however if the GPS coordinates are even slightly different I get an entirely different result.

What I am trying to do is plot a users path the same each time even if the start/end coordinates a slightly different.

The error I am getting is

fatal error: unexpectedly found nil while unwrapping an Optional value

Any suggestions?

Thanks

EDIT:

I am trying this but this is what is causing the error

func directionAPITest() {

    let directionURL = "https://roads.googleapis.com/v1/snapToRoads?path=-35.27801,149.12958|-35.28032,149.12907|-35.28099,149.12929|-35.28144,149.12984|-35.28194,149.13003|-35.28282,149.12956|-35.28302,149.12881|-35.28473,149.12836&interpolate=true&key=xyz"

    let request = NSURLRequest(URL: NSURL(string:directionURL)!)
    let session = NSURLSession.sharedSession()

}

Are you sure that JSONObjectWithData is a NSDictionary? (and not an Array) Can you add a breakpoint to that line and inspect the data without using explicit casting. Is that data also nil? — Konrad77, Jul 20 '15 at 08:16
Are you getting a crash or "entirely different results"? Please explain your problem more clearly. — Mundi, Jul 20 '15 at 09:12
Yes I am getting a crash. I have added the error. I just want to be able to is the roads api, not the directions api — puks1978, Jul 20 '15 at 20:37
I have added the snaptoroads function which is causing the error. I don't even know if I am using it correctly in Swift. — puks1978, Jul 21 '15 at 00:35

score 0 · Accepted Answer · edited May 23 '17 at 12:06

0

I was able to resolve this after finding this post NSURL found nil while unwraping an Optional value

Basically had to escape the string.

edited May 23 '17 at 12:06

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answered Jul 21 '15 at 05:32

puks1978

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Snap to Roads in Swift

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