MapDirectionsHelper.h

#import <Foundation/Foundation.h>
@class MapDirectionsHelper;
@protocol MapDirectionsHelperDelegate
 
@optional
-(void)mapDirectionsHelper:(MapDirectionsHelper *)sender didGetRoute:(MKRoute *)route;
-(void)mapDirectionsHelper:(MapDirectionsHelper *)sender didFailToGetRoute:(NSError *)error;
-(void)mapDirectionsHelper:(MapDirectionsHelper *)sender didGetRouteETA:(NSTimeInterval)eta;
-(void)mapDirectionsHelper:(MapDirectionsHelper *)sender didFailToGetRouteETA:(NSError *)error;
 
@end
@interface FLMapDirectionsHelper : NSObject
 
@property (nonatomic,weak) id<MapDirectionsHelperDelegate>delegate;
-(void)routeDirectionsFromOrigin:(CLLocationCoordinate2D)originCoords
                     destination:(CLLocationCoordinate2D)destinationCoords;
-(void)calculateETAForOrigin:(CLLocationCoordinate2D)originCoords
                 destination:(CLLocationCoordinate2D)destinationCoords;
@end

MapDirectionsHelper.m

#import <MapKit/MapKit.h>
 
#import "MapDirectionsHelper.h"
 
@implementation MapDirectionsHelper
 
#pragma mark map item methods
+(MKMapItem *)mapItemWithCoords:(CLLocationCoordinate2D)coords
{
    NSDictionary *optionsDict = [NSDictionary dictionaryWithObjectsAndKeys:@"",@"", nil];
    MKPlacemark *source = [[MKPlacemark alloc]initWithCoordinate:coords
                                               addressDictionary:optionsDict];
    return [[MKMapItem alloc]initWithPlacemark:source];
}
+(MKMapItem *)sourceItemWithCoords:(CLLocationCoordinate2D)coords
{
    return [MapDirectionsHelper mapItemWithCoords:coords];
}
+(MKMapItem *)destinationItemWithCoords:(CLLocationCoordinate2D)coords
{
    return [MapDirectionsHelper mapItemWithCoords:coords];
}
 
#pragma mark routing methods
-(void)routeDirectionsFromOrigin:(CLLocationCoordinate2D)originCoords
                     destination:(CLLocationCoordinate2D)destinationCoords
{
 
    MKDirectionsRequest *request = [[MKDirectionsRequest alloc]init];
    [request setSource:[MapDirectionsHelper sourceItemWithCoords:originCoords]];
    [request setDestination:[MapDirectionsHelper destinationItemWithCoords:destinationCoords]];
    [request setTransportType:MKDirectionsTransportTypeAutomobile];
    
    MKDirections *direction = [[MKDirections alloc]initWithRequest:request];
 
    //request directions from apple and draw line in reoute
    [direction calculateDirectionsWithCompletionHandler:^(MKDirectionsResponse *response,
                                                          NSError *error) {
        if (error)
        {
            [self.delegate fLMapDirectionsHelper:self
                               didFailToGetRoute:error];
            return;//handle errors properly
        }
        
        NSArray *arrRoutes = [response routes];
        [arrRoutes enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            
            MKRoute *route = obj;
            [self.delegate fLMapDirectionsHelper:self
                                     didGetRoute:route];
        }];
    }];
}
 
-(void)calculateETAForOrigin:(CLLocationCoordinate2D)originCoords
                 destination:(CLLocationCoordinate2D)destinationCoords
{
    //create our request object
    MKDirectionsRequest *request = [[MKDirectionsRequest alloc]init];
    [request setSource:[MapDirectionsHelper sourceItemWithCoords:originCoords]];
    [request setDestination:[MapDirectionsHelper destinationItemWithCoords:destinationCoords]];
    [request setTransportType:MKDirectionsTransportTypeAutomobile];
    
    MKDirections *direction = [[MKDirections alloc]initWithRequest:request];
    [direction calculateETAWithCompletionHandler:^(MKETAResponse *response,
                                                   NSError *error) {
        if (error) {
            [self.delegate mapDirectionsHelper:self
                          didFailToGetRouteETA:error];
            return;//handle errors properly
        }
        [self.delegate mapDirectionsHelper:self
                            didGetRouteETA:[response expectedTravelTime]];
    }];
}