ios - Unable to remove view from superview -


i using banner code, show banner in below example code 

   hzbanneradoptions *options = [[hzbanneradoptions alloc] init];         [hzbannerad requestbannerwithoptions:options success:^(hzbannerad *banner) {             [viewcontroller.view addsubview:banner];         } failure:^(nserror *error) {             nslog(@"error = %@",error);         }];

however, when want hide/remove banner, use this;

[self.currentbannerad removefromsuperview];     self.currentbannerad = nil;

but not working, banner still there, have tried variants such 

[currentbannerad sethidden:yes];

with no success, ideas how remove banner view?

when add banner view, have no reference it, have assign property this:

hzbanneradoptions *options = [[hzbanneradoptions alloc] init]; [hzbannerad requestbannerwithoptions:options success:^(hzbannerad *banner) {     self.currentbannerad = banner;     [viewcontroller.view addsubview:self.currentbannerad]; } failure:^(nserror *error) {     nslog(@"error = %@",error); }];

and remove using own code, add layoutifneeded line:

[self.currentbannerad removefromsuperview]; self.currentbannerad = nil; [viewcontroller.view layoutifneeded];

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