iphone - Google Maps markers not removing iOS -


i'm running thread fetch drivers location every 10 seconds , want remove added markers map doesn't work..

my code:

-(void)apiresponse:(id)returnjson {                 [googlemapsdriverpin setmap:nil];         googlemapsdriverpin = nil;          nsmutablearray *driverpins = [[nsmutablearray alloc]init];         (int x = 0; x < [[returnjson valueforkey:@"drivers"] count]; x++) {             cllocation *driverlocations = [[cllocation alloc]initwithlatitude:[[[[returnjson valueforkey:@"drivers"] objectatindex:x] valueforkey:@"driver_latitude"] doublevalue] longitude:[[[[detail valueforkey:@"drivers"] objectatindex:x] valueforkey:@"driver_longitude"] doublevalue]];             [driverpins addobject:driverlocations];         }          (cllocation *newlocation in driverpins) {             googlemapsdriverpin = [[gmsmarker alloc] init];             [googlemapsdriverpin setposition:newlocation.coordinate];             [googlemapsdriverpin setanimated:yes];             [googlemapsdriverpin settitle:@"title"];             [googlemapsdriverpin setsnippet:@"snippet"];             [googlemapsdriverpin seticon:[gmsmarker markerimagewithcolor:[uicolor blackcolor]]];             [googlemapsdriverpin setmap:googlemaps];          } }

it keeps adding , adding every 10 seconds , not removing, please help! thanks!

its kind of quick , dirty option if wanted go way gmsmarker has userdata property use tag driver pins

- (void)apiresponse:(id)returnjson {             (gmsmarker *pin in self.googlemaps.markers) {         if (pin.userdata == @"driver pin"){              pin.map = nil;          }     }      ...      (cllocation *newlocation in driverpins) {         googlemapsdriverpin = [[gmsmarker alloc] init];         ...         [googlemapsdriverpin setuserdata:@"driver pin"];     } }

update:

[self.googlemapsview clear];

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