How to give suggestions based on MKmapview search in a tableview

Question

Hello guys. Im stuck and this might be a bit over the top but i hope someone can help me.

So I have a map on my app with MKmapview. Above the app i have a search option and when the search find a place it adds a annotation to that specific place. But the search takes the last suggestion when i do a search but i want to display the different results when a user search. So the user can take that suggestion and it will go back to the map and put the annotation on that location. The code that I have right now is:

func searchBarSearchButtonClicked(searchBar: UISearchBar){

    //1
    searchBar.resignFirstResponder()
    dismissViewControllerAnimated(true, completion: nil)
    if self.mapView.annotations.count != 0{
        annotation = self.mapView.annotations[0]
        self.mapView.removeAnnotation(annotation)
    }

    //2
    localSearchRequest = MKLocalSearchRequest()
    localSearchRequest.naturalLanguageQuery = searchBar.text
    localSearch = MKLocalSearch(request: localSearchRequest)
    localSearch.startWithCompletionHandler { (localSearchResponse, error) -> Void in

        if localSearchResponse == nil{
            let alertController = UIAlertController(title: nil, message: "Place Not Found", preferredStyle: UIAlertControllerStyle.Alert)
            alertController.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.Default, handler: nil))
            self.presentViewController(alertController, animated: true, completion: nil)
            return
        }

        //3
        self.pointAnnotation = MKPointAnnotation()
        self.pointAnnotation.title = searchBar.text
        self.pointAnnotation.coordinate = CLLocationCoordinate2D(latitude: localSearchResponse!.boundingRegion.center.latitude, longitude:     localSearchResponse!.boundingRegion.center.longitude)

        self.pinAnnotationView = MKPinAnnotationView(annotation: self.pointAnnotation, reuseIdentifier: nil)
        self.mapView.centerCoordinate = self.pointAnnotation.coordinate
        self.mapView.addAnnotation(self.pinAnnotationView.annotation!)
        self.mapItemData = localSearchResponse?.mapItems.last
    }
}

Im guessing that i should exchange the last part self.mapItemData = localSearchResponse?.mapItems.last with like a for loop like this maybe: ```for item in localSearchResponse!.mapItems { // add to a tableView }

Answer 1 · 2015-11-26T00:31:12Z

November 26, 2015 12:31am

Hey there!

You are right, the mapItems array contains multiple items, provided multiple items are found. Let me give you a quick example on how you can display search results on a map. It is also a great showcase for the guard statement. ;)

// ...

// The following code is located in localSearch.startWithCompletionHandler
guard let localSearchResponse = localSearchResponse else {
    // Show your not found alert here
    // Note: localSearchResponse being nil does not necessarily mean no results have been found,
    // there are other reasons why this would fail. Check the error object for more details.
    return
}

// Thanks to guard, localSearchResponse is unwrapped here already and guaranteed to be non nil
// Note: You might want to remove previous annotations from the mapView at this point
mapView.removeAnnotations(mapView.annotations)

for item in localSearchResponse.mapItems {
    // item is of type MKMapItem, we create our annotation from that
    let annotation = MKPointAnnotation()

    // Set the annotation coordinate to the actual placemark
    // coordinate, rather than the center of our map view
    annotation.coordinate = item.placemark.coordinate

    // Set the annotation title to the actual name, rather than the search text
    if let name = item.name {
        annotation.title = name
    }

    // Add this annotation to our map
    self.mapView.addAnnotation(annotation)
}

//...

You will have to adjust this code to meet your needs, but this might be a starting point.

Hope that helps :)

Answer 2 · 2015-11-26T20:54:17Z

November 26, 2015 8:54pm

So in here

´´´ guard let localSearchResponse = localSearchResponse else { // Show your not found alert here // Note: localSearchResponse being nil does not necessarily mean no results have been found, // there are other reasons why this would fail. Check the error object for more details. return } ´´´

Is where i put the tableview code? :-)

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Tim Edgren

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How to give suggestions based on MKmapview search in a tableview

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Martin Wildfeuer

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Tim Edgren

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Martin Wildfeuer

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