Get driving direction in iPhone

I read both iPhone and Google Map for iPhone EULA and want to implement a static driving direction map in my iPhone application (native).

I am finding a simple way to ge开发者_如何学运维t route data and display with build-in route display feature in iOS 4 SDK' Mapkit.

Is there any programmer implement a feature like this with Google Map and Bing Map? Since Bing Map provided routing data in SOAP web service, it's seem easier to programming driving direction with Bing's service.

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I found the solution for this. Just use a JSON parser to got google map API

For example:

NSDictionary *testJsondata = [self testJson:GoogleMapXMLDirectionQueryString];
    NSLog(@"Here is the title of the response: %@", [testJsondata valueForKey:@"status"]);

    for (id key in testJsondata) {

        NSLog(@"key: %@, value: %@", key, [testJsondata objectForKey:key]);

    }
}

- (NSDictionary *) testJson : (NSString*) url
{
    id response = [self objectWithUrl:[NSURL URLWithString:url]];

    NSDictionary *feed = (NSDictionary *)response;
    return feed;
}

- (id) objectWithUrl:(NSURL *)url
{
    SBJsonParser *jsonParser = [SBJsonParser new];
    NSString *jsonString = [self stringWithUrl:url];

    // Parse the JSON into an Object
    return [jsonParser objectWithString:jsonString error:NULL];
}

- (NSString *)stringWithUrl:(NSURL *)url
{
    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url
                                                cachePolicy:NSURLRequestReturnCacheDataElseLoad
                                            timeoutInterval:30];
    // Fetch the JSON response
    NSData *urlData;
    NSURLResponse *response;
    NSError *error;

    // Make synchronous request
    urlData = [NSURLConnection sendSynchronousRequest:urlRequest
                                    returningResponse: &response
                                                error: &error];

    // Construct a String around the Data from the response
    return [[NSString alloc] initWithData:urlData encoding:NSUTF8StringEncoding];
}

- (NSString *)getDirectionInXML:(NSString *)GoogleMapXMLDirectionQueryString 
{
    NSError *error;
    NSURLResponse *response;
    NSData *dataReply;
    NSString *stringReply;

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: 
                                    [NSURL URLWithString: [NSString stringWithFormat:GoogleMapXMLDirectionQueryString]]];
    [request setHTTPMethod: @"GET"];
    dataReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
    stringReply = [[NSString alloc] initWithData:dataReply encoding:NSUTF8StringEncoding];
    return stringReply;
}