Kostenko Kostenko - 5 months ago 25
iOS Question

Opens apple maps app from ios app with directions

As the title states I would like to open the native maps app in the ios device from within my own app, by pressing a button. currently I have used an

MKmapview
that displays a simple pin with lat/long taken from a
json
file.

the code is this :

- (void)viewDidLoad {
[super viewDidLoad];
}


// We are delegate for map view
self.mapView.delegate = self;

// Set title
self.title = self.location.title;

// set texts...
self.placeLabel.text = self.location.place;


self.telephoneLabel.text = self.location.telephone;
self.urlLabel.text = self.location.url;


**// Make a map annotation for a pin from the longitude/latitude points
MapAnnotation *mapPoint = [[MapAnnotation alloc] init];
mapPoint.coordinate = CLLocationCoordinate2DMake([self.location.latitude doubleValue], [self.location.longitude doubleValue]);
mapPoint.title = self.location.title;**

// Add it to the map view
[self.mapView addAnnotation:mapPoint];

// Zoom to a region around the pin
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(mapPoint.coordinate, 500, 500);
[self.mapView setRegion:region];


}`

When you touch the pin an info box appears with a title and an info button.

this is the code :

#pragma mark - MKMapViewDelegate

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
MKPinAnnotationView *view = nil;
static NSString *reuseIdentifier = @"MapAnnotation";

// Return a MKPinAnnotationView with a simple accessory button
view = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:reuseIdentifier];
if(!view) {
view = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseIdentifier];
view.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
view.canShowCallout = YES;
view.animatesDrop = YES;
}

return view;
}


I want to make a method that opens the maps app with directions from the Current users location to the mapPoint above , when clicking the button in the info box above.
Is that possible? Also Can I customize the look of this button? (i mean like putting a different image to the button to make it look like "press me for direction kinda" ).

Sorry if this a stupid question, but this is my first ios app and Obj-c is a totally new language to me.

thanks for all the replies in advance.

Answer

You init a button and add action to button:

- (IBAction)mapsDirections:(id)sender {
    NSString* url = [NSString stringWithFormat:@"http://maps.apple.com/?saddr=%f,%f&daddr=%f,%f",self.mapView.userLocation.coordinate.latitude, self.mapView.userLocation.coordinate.longitude, mapPoint.coordinate.latitude, mapPoint.coordinate.longitude];
    [[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];
}

the mapPoint is where you want to direction

more parameters (ex: the transport type) look at here

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