ios - how to remove particular markers from GMS? -

i asked earlier how show different markerinfowindow in question, , i'm trying delete particular marker when user clicks on button on left corner.

first in .h file :

nsmutablearray *adsmarray; gmsmarker *adsmarker; 

then created ads marker this:

    (int l=0 ; l<self.ads.count; l++) {     cllocationcoordinate2d pos = cllocationcoordinate2dmake([[[self.ads objectatindex:l] objectforkey:@"lati"] doublevalue],[[[self.ads objectatindex:l] objectforkey:@"longi"] doublevalue]);     nslog(@"ads:: %f",[[[self.ads objectatindex:l] objectforkey:@"longi"] doublevalue]);     adsmarker = [[gmsmarker alloc]init];     adsmarker.position=pos;     //marker.infowindowanchor = cgpointmake(0.44f, 0.45f);     adsmarker.draggable = no;     adsmarker.appearanimation=yes;     nsmutablearray*temparray = [[nsmutablearray                                  alloc] init];     [temparray addobject:@"ads"];     [temparray addobject:[self.ads objectatindex:l]];      adsmarker.userdata = temparray;     adsmarker.map = mapview_;     adsmarker.icon=[gmsmarker markerimagewithcolor:[uicolor bluecolor]];  } 

then in ibaction remove them wrote:

for (int =0; i<self.ads.count; i++) {        // adsmarker.map = nil;         [adsmarker setmap:nil];     } 

when add marker store reference it. when want remove it, set map property nil - remove map.