Open maps application in iOS with a location within a app.

Open Maps iOS

NSString *mapsURL = @"http://maps.google.com/maps?q=";
    if ([[[[UIDevice currentDevice] systemVersion] substringToIndex:1] intValue] >= 6) // if iOS 6 or greater use apple maps
    {
        mapsURL = @"http://maps.apple.com/maps?q=";
    }
    NSString *mapaddress = [mapsURL stringByAppendingString:address];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:[mapaddress stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]]];