In this tutorial, you'll learn how to calculate the quickest route between two or three given locations using a mashup of MapKit and Core Location.
Hello, can you fix the link for the complete project code. Thanks you.
I just checked the link and incremented the file name to
https://www.raywenderlich.com/wp-content/uploads/2015/11/ProcrastinatorsRevenge-2.zip
Hope this helps
Great article on an interesting topic.
I do have one question however. Why did you add extensions rather than functions when you have the source code?
Hi Lindsey, Thank you this is amazing. I have a really dumb question!!! Where do you create the code making this a return trip?
Also, is there anyway to create a list of roads (as opposed to directions)?
Thank you
I found our how to take the “roundtrip” part of the code away - thank you.
If you have any time I am interested in trying to list the roads in the route (as apart from the step by step directions). Is that possible
Hi, can i change the language of root instructions? i want that the instructions in italian language thanks
Thanks for a great and informative post. I have a question. I have been trying to figure out how to display a label similar to the time label, but for the overall distance of the route, but have been unsuccessful so far. Any ideas or pointers?
THANKS!
Finally Solved it. Thanks again
Hi Lindsey, Do you have any hints on how to convert the code to Swift 3.
I am getting one remaining error and don’t have the knowledge to fix it
The working Swift 2 Code Block was
func showRoute(routes: [MKRoute], time: NSTimeInterval) {
var directionsArray = (startingAddress: String, endingAddress: String, route: MKRoute)
for i in 0…<routes.count {
plotPolyline(routes[i])
directionsArray += [(locationArray[i].textField.text!,
locationArray[i+1].textField.text!, routes[i])]
}
displayDirections(directionsArray)
printTimeToLabel(time)
}
Swift 3 has converted this to
func showRoute(routes: [MKRoute], time: TimeInterval) {
var directionsArray = (startingAddress: String, endingAddress: String, route: MKRoute)
for i in 0…<routes.count {
plotPolyline(route: routes[i])
directionsArray += [(locationArray[i].textField?.text,
locationArray[i+1].textField?.text, routes[i])]
}
displayDirections(directionsArray: directionsArray)
printTimeToLabel(time: time)
}
This produces an error on the line
directionsArray += [(locationArray[i].textField?.text,
locationArray[i+1].textField?.text, routes[i])]
Cannot convert value of type ‘[(startingAddress: String, endingAddress: String, route: MKRoute)]’ to expected argument type ‘inout _’
I saw your question but There is no one answer. And, That is not only one problem.
Here is full body of ViewController
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController {
@IBOutlet weak var sourceField: UITextField!
@IBOutlet weak var destinationField1: UITextField!
@IBOutlet weak var destinationField2: UITextField!
@IBOutlet weak var topMarginConstraint: NSLayoutConstraint!
@IBOutlet var enterButtonArray: [UIButton]!
var originalTopMargin: CGFloat!
let locationManager = CLLocationManager()
var locationTuples: [(textField: UITextField?, mapItem: MKMapItem?)]!
var locationsArray: [(textField: UITextField?, mapItem: MKMapItem?)] {
var filtered = locationTuples.filter({ $0.mapItem != nil })
filtered += [filtered.first!]
return filtered
}
override func viewDidLoad() {
super.viewDidLoad()
originalTopMargin = topMarginConstraint.constant
locationTuples = [(sourceField, nil), (destinationField1, nil), (destinationField2, nil)]
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
if CLLocationManager.locationServicesEnabled() {
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
locationManager.requestLocation()
}
}
override func viewWillAppear(_ animated: Bool) {
navigationController?.isNavigationBarHidden = true
}
@IBAction func getDirections(_ sender: AnyObject) {
view.endEditing(true)
performSegue(withIdentifier: "show_directions", sender: self)
}
override func shouldPerformSegue(withIdentifier identifier: String, sender: Any?) -> Bool {
if locationTuples[0].mapItem == nil ||
(locationTuples[1].mapItem == nil && locationTuples[2].mapItem == nil) {
showAlert("Please enter a valid starting point and at least one destination.")
return false
} else {
return true
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let directionsViewController = segue.destination as! DirectionsViewController
directionsViewController.locationArray = locationsArray
}
@IBAction func addressEntered(_ sender: UIButton) {
view.endEditing(true)
let currentTextField = locationTuples[sender.tag-1].textField
CLGeocoder().geocodeAddressString(currentTextField!.text!,
completionHandler: {(placemarks, error) -> Void in
if let placemarks = placemarks {
var addresses = [String]()
for placemark in placemarks {
addresses.append(self.formatAddressFromPlacemark(placemark))
}
self.showAddressTable(addresses, textField:currentTextField!,
placemarks:placemarks, sender:sender)
} else {
self.showAlert("Address not found.")
}
} )
}
func showAddressTable(_ addresses: [String], textField: UITextField,
placemarks: [CLPlacemark], sender: UIButton) {
let addressTableView = AddressTableView(frame: UIScreen.main.bounds, style: UITableViewStyle.plain)
addressTableView.addresses = addresses
addressTableView.currentTextField = textField
addressTableView.placemarkArray = placemarks
addressTableView.mainViewController = self
addressTableView.sender = sender
addressTableView.delegate = addressTableView
addressTableView.dataSource = addressTableView
view.addSubview(addressTableView)
}
func formatAddressFromPlacemark(_ placemark: CLPlacemark) -> String {
return (placemark.addressDictionary!["FormattedAddressLines"] as! [String]).joined(separator: ", ")
}
@IBAction func swapFields(_ sender: AnyObject) {
swap(&destinationField1.text, &destinationField2.text)
swap(&locationTuples[1].mapItem, &locationTuples[2].mapItem)
swap(&self.enterButtonArray.filter{$0.tag == 2}.first!.isSelected, &self.enterButtonArray.filter{$0.tag == 3}.first!.isSelected)
}
func showAlert(_ alertString: String) {
let alert = UIAlertController(title: nil, message: alertString, preferredStyle: .alert)
let okButton = UIAlertAction(title: "OK",
style: .cancel) { (alert) -> Void in
}
alert.addAction(okButton)
present(alert, animated: true, completion: nil)
}
// The remaining methods handle the keyboard resignation/
// move the view so that the first responders aren't hidden
func moveViewUp() {
if topMarginConstraint.constant != originalTopMargin {
return
}
topMarginConstraint.constant -= 165
UIView.animate(withDuration: 0.3, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func moveViewDown() {
if topMarginConstraint.constant == originalTopMargin {
return
}
topMarginConstraint.constant = originalTopMargin
UIView.animate(withDuration: 0.3, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
}
extension ViewController: UITextFieldDelegate {
func textField(_ textField: UITextField,
shouldChangeCharactersIn range: NSRange,
replacementString string: String) -> Bool {
enterButtonArray.filter{$0.tag == textField.tag}.first!.isSelected = false
locationTuples[textField.tag-1].mapItem = nil
return true
}
func textFieldDidBeginEditing(_ textField: UITextField) {
moveViewUp()
}
func textFieldDidEndEditing(_ textField: UITextField) {
moveViewDown()
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
view.endEditing(true)
moveViewDown()
return true
}
}
extension ViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
CLGeocoder().reverseGeocodeLocation(locations.last!,
completionHandler: {(placemarks, error) -> Void in
if let placemarks = placemarks {
let placemark = placemarks[0]
self.locationTuples[0].mapItem = MKMapItem(placemark:
MKPlacemark(coordinate: placemark.location!.coordinate,
addressDictionary: placemark.addressDictionary as! [String:AnyObject]?))
self.sourceField.text = self.formatAddressFromPlacemark(placemark)
self.enterButtonArray.filter{$0.tag == 1}.first!.isSelected = true
}
})
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error)
}
}
The following managed to build for me.
func showRoute(routes: [MKRoute], time: TimeInterval) {
var directionsArray = [(startingAddress: String, endingAddress: String, route: MKRoute)]()
for i in 0..<routes.count {
plotPolyline(route: routes[i])
directionsArray = [(startingAddress:(locationArray[i].textField!.text!),
endingAddress: (locationArray[i+1].textField!.text!), route: routes[i])]
But I am receiving a Thread 1: signal SIGABRT error from AppDelegate
i think it’s for
CLGeocoder().reverseGeocodeLocation(locations.last!,
completionHandler:
{(placemarks:[CLPlacemark]?, error:Error?) -> Void in })
just need to change NSError to Error
still crashes with a EXC_BAD_INSTRUCTION (code=EXC_i386_INVOP, subcode=0x0) in simulator even after applying all the previous changes I’m run-on iOS 10.2 and Xcode 8.2.1
Here’s what I did to fix the error Cannot convert value of type ‘[(startingAddress: String, endingAddress: String, route: MKRoute)]’ to expected argument type ‘inout _’
func showRoute(routes:[MKRoute]) {
var directionsArray = (startingAddress: String, endingAddress: String, route: MKRoute)
var directionsArrayVar = (startingAddress: String, endingAddress: String, route: MKRoute)
for i in 0…<routes.count {
plotPolyline(route: routes[i])
directionsArrayVar = [((locationArray[i].textField?.text!)!, endingAddress: (locationArray[i+1].textField?.text!)!, route: routes[i])]
directionsArray.append(contentsOf: directionsArrayVar)
}
displayDirections(directionsArray: directionsArray)
}
I know it’s not the best option but it worked for me
This tutorial is more than six months old so questions are no longer supported at the moment for it. We will update it as soon as possible. Thank you! :]