ios - how to change the button colour if checkbox is checked in swift? -

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i have agree button below 2 checkbox. want enable agree button , change colour of agree button after both checkbox checked. have used custom images checkbox. using code

this uibutton class

let selectedimage = uiimage(named: "checkbox_checked") let unselectedimage = uiimage(named: "checkbox_unchecked")   class qbutton: uibutton {      //bool property     var ischecked:bool = false{         didset{             if ischecked {                 self.setimage(selectedimage, forstate: uicontrolstate.normal)             }else{                 self.setimage(unselectedimage, forstate: uicontrolstate.normal)         }     }     }     override init(frame: cgrect){         super.init(frame:frame)         self.layer.maskstobounds = true         self.setimage(unselectedimage, forstate: uicontrolstate.normal)          self.addtarget(self, action: "buttonclicked:", forcontrolevents: uicontrolevents.touchupinside)         self.ischecked = false     }      required init(coder adecoder: nscoder) {         super.init(coder: adecoder)!     }      func buttonclicked(sender: uibutton) {         if(sender == self){             if ischecked == true{                 ischecked = false                 print("true")                 self.setimage(unselectedimage, forstate: uicontrolstate.normal)             }else{                 ischecked = true                 print("false")                 self.setimage(selectedimage, forstate: uicontrolstate.selected)              }             nsuserdefaults.standarduserdefaults().setobject(ischecked, forkey: "isbtnchecked")             nsuserdefaults.standarduserdefaults().synchronize()         }     }  }

and view controller class using qbutton class

checkboxone = qbutton(frame: cgrectmake(x,y,width,height))         ischecked = nsuserdefaults.standarduserdefaults().boolforkey("isbtnchecked")         checkboxone.ischecked = ischecked         self.view.addsubview(checkboxone)  checkboxtwo = qbutton(frame: cgrectmake(x,y,width,height))         checkboxtwo.ischecked = ischecked         self.view.addsubview(checkboxtwo)

now want change color of agree button if user check both checkboxes.

there problem logic of qbutton. storing checked state in user defaults property isbtnchecked. there multiple instances of qbutton (2 checkboxes), 1 checked property set true. avoid storing state of checkbox in defaults , instead query state checkboxone , checkboxtwo using ischecked property.


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