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 met

Answer 1

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)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.