title: How to Open Google Map Navigation Url with Direction and Voice in iOS?
body: <p>i am newbie in iOS I want to make an app that contain map kit navigation.i want to open navigation url of google map if user device have Google map application. if it is not contain then i want to open Apple map Here i write a code for like as</p>
  
  <pre><code> -(IBAction)navigationButtonPressed:(id)sender
   {
  if ([[UIApplication sharedApplication] canOpenURL:
       [NSURL URLWithString:@"comgooglemaps://"]])
  {
      NSString *urlString=[NSString stringWithFormat:@"comgooglemaps://?center=%f,%f&amp;zoom=14&amp;views=traffic",self.latitude,self.longitude];
      [[UIApplication sharedApplication] openURL:
       [NSURL URLWithString:urlString]];
  }
  else
  {
      NSString *string = [NSString stringWithFormat:@"http://maps.apple.com/?ll=%f,%f",self.latitude,self.longitude];
      [[UIApplication sharedApplication] openURL:[NSURL URLWithString:string]];
  }
  }
  </code></pre>
  
  <p>But here i want to open google map or apple map with turn by turn direction between User current location and Selected Location how it is Possible Please Give me Solution For this.</p>