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#47: MKLocalSearch πŸ“


MKLocalSearch is a wonderful little gem hidden inside MapKit. It allows an app to perform a natural language query for local points of interest near a given latitude and longitude. Today we'll use it to build a simple app to find us a place to eat lunch.

manager = CLLocationManager()
manager!.delegate = self
manager!.desiredAccuracy = kCLLocationAccuracyThreeKilometers

// then later, once we have a location:

let request = MKLocalSearchRequest()

request.naturalLanguageQuery = "Restaurants"
request.region = MKCoordinateRegionMakeWithDistance(location.coordinate, 1600, 1600)

MKLocalSearch(request: request).startWithCompletionHandler { (response, error) in
  guard error == nil else { return }
  guard let response = response else { return }
  guard response.mapItems.count > 0 else { return }

  let randomIndex = Int(arc4random_uniform(UInt32(response.mapItems.count)))
  let mapItem = response.mapItems[randomIndex]


First we set up our CLLocationManager, and use the new iOS 9 method for requesting a β€œsingle location” instead of continuous updates.

Then we create the MKLocalSearchRequest object and tell it to search "Restaurants" within 1600 meters (about a mile) of the user's current location.

After that it's just a matter of waiting for results, choosing one at random, and then we cheat a bit (since this is just a demo) and pop the user out to the Maps app to view the chosen result.

Download the example project here: j.mp/bite047