Display google navigation based on given locations - ios

Question

I am working on google maps integration I am trying to display google navigation at present I am using the following code. I am trying to display like google navigation based on location what I pass through the api
NSURL *url=[[NSURL alloc] initWithString:[NSString stringWithFormat:#"http://maps.googleapis.com/maps/api/directions/json?origin=%f,%f&destination=%f,%f&alternateroutes=false&sensor=true" ,12.920631,77.670494,8.3075,77.2218]];
NSURLResponse *res;
NSError *err;NSURL *url=[[NSURL alloc] initWithString:[NSString stringWithFormat:#"http://maps.googleapis.com/maps/api/directions/json?origin=%f,%f&destination=%f,%f&alternateroutes=false&sensor=true" ,12.920631,77.670494,8.3075,77.2218]];
NSURLResponse *res;
NSError *err;
NSData *data=[NSURLConnection sendSynchronousRequest:[[NSURLRequest alloc] initWithURL:url] returningResponse:&res error:&err];
if(data)
{
NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
if(dic)
{
NSArray *routes=dic[#"routes"];
NSArray *legs=routes[0][#"legs"];
NSArray *steps=legs[0][#"steps"];
NSLog(#"the legs are:%#",steps);
NSMutableArray *textsteps=[[NSMutableArray alloc] init];
NSMutableArray *latlong=[[NSMutableArray alloc]init];
for(int i=0; i< [steps count]; i++){
NSString *html=steps[i][#"html_instructions"];
[latlong addObject:steps[i][#"end_location"]];
NSLog(#"the data:%#",steps[i][#"end_location"]);
[textsteps addObject:html];
encodedPath = [[[steps objectAtIndex:i] valueForKey:#"polyline"] valueForKey:#"points"];
[self polylineWithEncodedString:encodedPath];
polyline.strokeColor = [UIColor redColor];
polyline.strokeWidth = 2.f;
polyline.map = mapView;
NSLog(#"the encoded patg:%#",encodedPath);
GMSMarker *marker1 = [[GMSMarker alloc]init];
marker1.map = mapView;
NSLog(#"Direction path");
}
}
else
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"" message:#"Connection Error" delegate:self cancelButtonTitle:#"OK" otherButtonTitles:#"", nil];
[alert show];
}
I am expecting an output like

Answer 1

You want to show same direction, time and everything as Google Maps do. Google Maps SDK of iOS will draw a path for you on maps.
You can use the Google Direction API to get and request for direction between source and destination. You can use GMSPolyline to draw it.
But other things, like where to take a turn, whats time is left to reach the destination and other things, you need to manage manually. If you want to show same as Google, you need to make URL and open in WebView.
You can see URLSchema documentation for more detail.

Answer 2

Hoping you are expecting like this code
if ([[UIApplication sharedApplication] canOpenURL:
[NSURL URLWithString:#"comgooglemaps://"]]) {
[[UIApplication sharedApplication] openURL:
[NSURL URLWithString:#"comgooglemaps://?center=40.765819,-73.975866&zoom=14&views=traffic"]];
} else {
NSLog(#"Can't use comgooglemaps://");
}