Display multiple markers on the Google Map in Objective C - google-maps

Question

How can I display multiple markers on the Google Map in iOS?
I used the following approach, but it didn't work.
for (int i = 0; i < [array count]; i++)
{
pointsToUse[i] = CLLocationCoordinate2DMake([[[[array objectAtIndex:0] componentsSeparatedByString:#","] objectAtIndex:0] floatValue],[[[[array objectAtIndex:0] componentsSeparatedByString:#","] objectAtIndex:1] floatValue]);
[_map animateToLocation:pointsToUse[i]];
GMSMarkerOptions *options = [[GMSMarkerOptions alloc] init];
options.position = pointsToUse[i];
[_map animateToLocation:pointsToUse[i]];
[_map addMarkerWithOptions:options];
}

Answer 1

You're using [array objectAtIndex:0] (in two places), when I think you should probably be using [array objectAtIndex:i]?
Also, you probably don't need the calls to animateToLocation?

Answer 2

I tried your code. This seems to work fine. Just delete the object at index 0 after passing it values to pointsToUse.
NSMutableArray *array = [NSMutableArray arrayWithObjects:#"12.981902,80.266333",#"12.982902,80.266363", nil];
CLLocationCoordinate2D pointsToUse[5];
for (int i = 0; i < [array Size]; i++)
{
pointsToUse[i] = CLLocationCoordinate2DMake([[[[array objectAtIndex:0] componentsSeparatedByString:#","] objectAtIndex:0] floatValue],[[[[array objectAtIndex:0] componentsSeparatedByString:#","] objectAtIndex:1] floatValue]);
[array removeObjectAtIndex:0];
GMSMarkerOptions *options = [[GMSMarkerOptions alloc] init];
options.position = pointsToUse[i];
[mapView_ animateToLocation:pointsToUse[i]];
[mapView_ addMarkerWithOptions:options];
}

Answer 3

Try this:
-(void)plotMutliplePinsonMap
{
mapView_ = [[GMSMapView alloc]initWithFrame:CGRectMake(0, 96, 320, 450)];
for(int i=0;i<[arrTobeShown count];i++)
{
double_lat = [[[arrTobeShown objectAtIndex:i]valueForKey:#"latitude"] doubleValue];
double_long = [[[arrTobeShown objectAtIndex:i]valueForKey:#"longitude"] doubleValue];
GMSMarker *mkr = [[GMSMarker alloc] init];
if (double_lat !=0 && double_long!=0)
{
[mkr setPosition:CLLocationCoordinate2DMake(double_lat, double_long)];
[mkr setTitle:[[arrTobeShown objectAtIndex:i] valueForKey:#"name"]];
[mkr setSnippet:[[arrTobeShown objectAtIndex:i] valueForKey:#"address"]];
[mkr setMap:mapView_];
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:double_lat longitude:double_long zoom:5];
mapView_.camera=camera;
}
}
[self.view addSubview:mapView_];
[mapView_ setHidden:YES];
[self.view layoutIfNeeded];
}

Answer 4

Yes both of you are correct. According to your suggestions I changed the code and it works.
But the problem is, I set the zoom and the zoom is fixed. If the two locations are far, I can't see both locations on one screen ( i need to pinch to see both). How can I see both locations at the same time?
My code is shown below.
-(void) displayMapwithPositionfortheArray:(NSMutableArray*) array
{
CLLocationCoordinate2D firstPoint = CLLocationCoordinate2DMake([[[[array objectAtIndex:0] componentsSeparatedByString:#","] objectAtIndex:0] floatValue],[[[[array objectAtIndex:0] componentsSeparatedByString:#","] objectAtIndex:1] floatValue]);
GMSCameraPosition *currloc = [GMSCameraPosition cameraWithLatitude:firstPoint.latitude
longitude:firstPoint.longitude
zoom:8
bearing:0
viewingAngle:45];
_map = [GMSMapView mapWithFrame:CGRectZero camera:currloc];
_map.myLocationEnabled = YES;
_map.frame = CGRectMake(0, heightOffset, self.view.frame.size.width, self.view.frame.size.height - heightOffset);
[self.view addSubview:_map];
CLLocationCoordinate2D pointsToUse[[array count]];
for (int i = 0; i < [array count]; i++)
{
pointsToUse[i] = CLLocationCoordinate2DMake([[[[array objectAtIndex:i] componentsSeparatedByString:#","] objectAtIndex:0] floatValue],[[[[array objectAtIndex:i] componentsSeparatedByString:#","] objectAtIndex:1] floatValue]);
GMSMarkerOptions *options = [[GMSMarkerOptions alloc] init];
options.position = pointsToUse[i];
[_map addMarkerWithOptions:options];
}
}