objective c - IBOutletCollection of UIButtons - changing selected state of buttons -


i'm having issue multiple uibuttons in view. i'd buttons selected individually, multiple selected @ time (example: 10 buttons, buttons 1, 4, 5, 9 selected).

in header have property iboutletcollection: 

@property (retain, nonatomic) iboutletcollection(uibutton) nsmutablearray *buttontostayselected;

in implementation, have ibaction:

-(ibaction)selectedbutton:(id)sender{   (uibutton *b in self.buttontostayselected) {      if (b.isselected == 0){         [b setselected:yes];   } else         [b setselected:no];   } }

the issue i'm having when select of buttons tied collection, change selected. know problem (almost certain) lies in loop, every condition i've tried stipulate breaks code , leaves none of buttons able "change" state.

updated

to have them selectable, change state , check off multiple, used final code:

-(ibaction)selectedbutton:(id)sender {   (uibutton *b in self.buttontostayselected) {       if (sender == b) {       [b setselected:!b.isselected];     }    }   }

thanks help!

the selectbutton: message sent argument specifies button tapped, apply action buttons in collection, not button tapped.

-(ibaction)selectedbutton:(id)sender {   (uibutton *b in self.buttontostayselected)   {      if (sender == b)      {         b.isselected == !b.isselected      }   } }

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