Multiple marker is not showing - ios

Question

I want to show multiple marker on google map. There are answers based on this. But markers are not showing on the map. Although I am getting the latitude and longitude value based on the array result. What should I do?
Note: I have done some changes and the code running perfectly.
My code is:
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self performRequestForRestaurantListing];
geometryDict=[[NSMutableDictionary alloc]init];
locationDict=[[NSMutableDictionary alloc]init];
NSLog(#"the value of list is %#", _service);
NSLog(#"the value of stringradius is %#", _stringRadius);
/*---location Manager Initialize-------*/
self.manager=[[CLLocationManager alloc]init];
self.manager.distanceFilter = 100;
self.manager.desiredAccuracy = kCLLocationAccuracyBest;
[self.manager requestAlwaysAuthorization];
self.manager.delegate=self;
[self.manager startUpdatingLocation];
[mapView setDelegate:self];
latitude=#"22.5726";
longitude=#"88.3639";
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:[latitude doubleValue]
longitude:[longitude doubleValue]
zoom:12];
[mapView animateToCameraPosition:camera];
[self coordinateOnMap:latitude andWithLongitude:longitude];
}
-(void)coordinateOnMap:(NSString*)latitude andWithLongitude:(NSString*)longitude
{
GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] init];
CLLocationCoordinate2D location;
for (int i=0;i<[restaurantList count];i++)
{
driverMarker = [[GMSMarker alloc] init];
latitude=[[[[restaurantList objectAtIndex:i]objectForKey:#"geometry"]objectForKey:#"location"] objectForKey:#"lat"];
longitude=[[[[restaurantList objectAtIndex:i]objectForKey:#"geometry"]objectForKey:#"location"] objectForKey:#"lng"];
location.latitude = [latitude floatValue];
location.longitude = [longitude floatValue];
driverMarker.position = CLLocationCoordinate2DMake(location.latitude, location.longitude);
driverMarker.map = mapView;
}
driverMarker.icon=[UIImage imageNamed:#"marker"];
bounds = [bounds includingCoordinate:driverMarker.position];
driverMarker.title = #"My locations";
[driverMarker setTappable:NO];
mapView.myLocationEnabled = YES;
}

Answer 1

I guess your driveMarker gets deallocated by ARC immediatly after each loop.
If this really is your issue, you'll have to make sure that those markers "survive" the loop, e.g. with the following code:
#implementation MyController
#property (nonatomic) NSMutableArray *allMarkers;
- (void)viewDidLoad {
allMarkers = [[NSMutableArray alloc] init];
// ...
}
-(void)coordinateOnMap:(NSString*)latitude andWithLongitude:(NSString*)longitude {
//...
[allMarkers removeAllObjects];
for (int i=0;i<[restaurantList count];i++) {
GMSMarker *driverMarker = [[GMSMarker alloc] init];
[allMarkers addObject:driveMarker];
// ...
}
}
#end
This will create an NSArray property to store all created markers, just to keep them in scope.