Showing nearby restaurants in MKMap View

Question

In my iphone app,I have to show near by restaurants in Map View,Currently I am using Google map url in a web view.

But how can I show nearby restaurants with in 5000 meters of current location with native MKMap view(I found out my current location-lat&long)

I would like to learn how to implement as in the below screen shot(by clicking the annotations going to its detail too)

Any helps ?? thanks in advance

Answer 1

First refer this Google API Link https://developers.google.com/places/documentation/search and then get id and add this in parameter of googleId and just set radious parameter with 5000 value and for types set value restaurant..

See my bellow example..

NSString *str=[NSString  stringWithFormat:@"https://maps.googleapis.com/maps/api/place/search/json?location=%f,%f&radius=5000&types=%@&sensor=false&key=%@",currentLocation.latitude,currentLocation.longitude,@"restaurant",@"AIzaSyB7YTFTYyk9eb8ULNGxoy06-b_0DUOqdrY"];
NSLog(@"\n\n URL %@",str);
NSURL *strurl=[NSURL URLWithString:[str stringByReplacingOccurrencesOfString:@"|" withString:@"%7C"]];
//    NSURL *strurl = [NSURL URLWithString:@"https://maps.googleapis.com/maps/api/place/search/json?location=-33.8670522,151.1957362&radius=500&types=food&name=harbour&sensor=false&key=AIzaSyB7YTFTYyk9eb8ULNGxoy06-b_0DUOqdrY"];

ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:strurl];  
[request setDelegate:self];
[request startAsynchronous]; 

and implement these whole record on MKMapView like bellow...

- (void)requestFinished:(ASIHTTPRequest *)request {

    // Use when fetching text data
    NSString *responseString = [request responseString];
    NSLog(@"\n\n>>>>......Response String >>> %@",responseString);

    if(responseString)
    {
        SBJSON *json = [[SBJSON alloc] init];
        NSError *error = nil;
        id result = [json objectWithString:responseString error:&error];

        if ([result isKindOfClass:[NSMutableArray class]]) 
        {
            NSLog(@"\n\n.......This is Mutable Array");
        }
        else 
        {
            if ([[result objectForKey:@"results"] count]>0) 
            {
                NSLog(@">>>>>>>> dict keys :%d \nFull Address : %@\n LatLong : %@ \n total result : %d", [[result objectForKey:@"results"] count],[[result objectForKey:@"results"]valueForKey:@"vicinity"],[[[result objectForKey:@"results"]valueForKey:@"geometry"]valueForKey:@"location"],[[result objectForKey:@"results"]count]);


                for (int i=0; i<[[result objectForKey:@"results"] count]; i++)     
                {
                    ann = [[MyAnnotation alloc] init];
                    ann.title = [[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"name"];
                    ann.subtitle = [[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"vicinity"];   

                    ann.annReferance=[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"reference"];

                    CLLocationCoordinate2D location;
                    location.latitude = [[[[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"geometry"]valueForKey:@"location"] valueForKey:@"lat"]doubleValue];
                    location.longitude = [[[[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"geometry"]valueForKey:@"location"] valueForKey:@"lng"] doubleValue];
                    ann.coordinate=location;
                    ann.annLocation=[NSString stringWithFormat:@"%f,%f",location.latitude,location.longitude];

                    //                    NSLog(@"\n\n rating %@",ann.annrating);
                    if ([[[[result objectForKey:@"results"]objectAtIndex:i] allKeys] containsObject:@"rating"]) 
                    {
                        // contains key
                        ann.annrating=[[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"rating"]stringValue];
                        NSLog(@"\n\n rating %@",ann.annrating);
                    }
                    else
                    {
                        ann.annrating=@"";
                    }
                    ann.annaddress=[[[result objectForKey:@"results"]objectAtIndex:i]valueForKey:@"vicinity"];
                    [mapView addAnnotation:ann];
                }
            }
        }
    }
}

This is code which i use in my application, just do some changes with your requirement and you will get output..

i hope this helpful to you...

Answer 2

In iOS 6.1, you can use MKLocalSearch, part of the standard iOS MapKit.framework:

MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
request.naturalLanguageQuery = @"restaurant";
request.region = mapView.region;

MKLocalSearch *localSearch = [[MKLocalSearch alloc] initWithRequest:request];
[localSearch startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error) {

    NSMutableArray *annotations = [NSMutableArray array];

    [response.mapItems enumerateObjectsUsingBlock:^(MKMapItem *item, NSUInteger idx, BOOL *stop) {
        CustomAnnotation *annotation = [[CustomAnnotation alloc] initWithPlacemark:item.placemark];

        annotation.title = item.name;
        annotation.subtitle = item.placemark.addressDictionary[(NSString *)kABPersonAddressStreetKey];
        annotation.phone = item.phoneNumber;

        [annotations addObject:annotation];
    }];

    [self.mapView addAnnotations:annotations];
}];

My custom annotation is just a MKPlacemark plus a title and subtitle:

@interface CustomAnnotation : MKPlacemark

@property (strong, nonatomic) NSString *title;
@property (strong, nonatomic) NSString *subtitle;
@property (strong, nonatomic) NSString *phone;

@end

If you want to see the disclosure indicator on your callout (so you can transition to another controller to view the details, you can:

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
    if (![annotation isKindOfClass:[CustomAnnotation class]])
        return nil;

    MKAnnotationView *annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation
                                                                       reuseIdentifier:@"CustomAnnotationView"];
    annotationView.canShowCallout = YES;
    annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

    return annotationView;
}

If you want to open your other view when the user clicks on the callout accessory:

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
    if (![view.annotation isKindOfClass:[CustomAnnotation class]])
        return;
    CustomAnnotation *annotation = (CustomAnnotation *)view.annotation;

    ABRecordRef person = ABPersonCreate();
    ABRecordSetValue(person, kABPersonOrganizationProperty, (__bridge CFStringRef) annotation.title, NULL);

    if (annotation.phone)
    {
        ABMutableMultiValueRef phoneNumberMultiValue = ABMultiValueCreateMutable(kABMultiStringPropertyType);
        ABMultiValueAddValueAndLabel(phoneNumberMultiValue, (__bridge CFStringRef) annotation.phone, kABPersonPhoneMainLabel, NULL);
        ABRecordSetValue(person, kABPersonPhoneProperty, phoneNumberMultiValue, nil);
        CFRelease(phoneNumberMultiValue);
    }

    ABMutableMultiValueRef address = ABMultiValueCreateMutable(kABMultiDictionaryPropertyType);
    ABMultiValueAddValueAndLabel(address, (__bridge CFDictionaryRef) annotation.addressDictionary, kABWorkLabel, NULL);
    ABRecordSetValue(person, kABPersonAddressProperty, address, NULL);
    ABUnknownPersonViewController *personView = [[ABUnknownPersonViewController alloc] init];

    personView.unknownPersonViewDelegate = self;
    personView.displayedPerson = person;
    personView.allowsAddingToAddressBook = YES;

    [self.navigationController pushViewController:personView animated:YES];

    CFRelease(address);
    CFRelease(person);
}

- (void)unknownPersonViewController:(ABUnknownPersonViewController *)unknownPersonView didResolveToPerson:(ABRecordRef)person
{

}

For more information (e.g. customizing the annotation views, determining device location, etc.), refer to the Location Awareness Programming Guide.

See https://github.com/robertmryan/MKMapView-custom-annotations for a simple example.