ios - how to prevent a UITapGestureRecognizer in a background view from being called when clicking on an overlay -

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i have background dimmedview uitapgesturerecognizer. however, when click on overlayview, background uitapgesturerecognizer called. intended behavior? putting userinteractionenabled=false on our overlay still has background uitapgesturerecognizer called. how make overlay prevents uitapgesturerecognizer on background view (self.dimmedview) being called.

here's code:

func renderoverlaynav(){   println("yyy render outlay")   self.dimmedview=uiview(frame: cgrectmake(0.0, 0.0, self.screenwidth, self.screenheight))    self.dimmedview.backgroundcolor=uicolor.blackcolor().colorwithalphacomponent(0.5)   let dimmedviewtap = uitapgesturerecognizer(target: self, action:selector("tapondimmedview:"))   self.dimmedview.addgesturerecognizer(dimmedviewtap)     self.modalview=uiview(frame: cgrectmake(50.0, 144.0, (self.screenwidth-100), (self.screenheight - 200)))   self.modalview.backgroundcolor=uicolor.whitecolor()   self.modalview.userinteractionenabled=false    let modalscrollview = uiscrollview(frame: cgrectmake(10.0, 10.0, 200.0, 200.0))   modalscrollview.scrollenabled=true   modalscrollview.userinteractionenabled=false    let closemodalbtn = uibutton(frame: cgrectmake(10.0, 10.0, 40.0, 40.0))   closemodalbtn.titlelabel!.text="x"   closemodalbtn.backgroundcolor = uicolor.bluecolor()   self.modalview.addsubview(closemodalbtn)    let closemodalbtntap = uitapgesturerecognizer(target: self, action:selector("tapclosemodalbtn:"))   closemodalbtn.addgesturerecognizer(closemodalbtntap) }  func tapondimmedview(recognizer: uitapgesturerecognizer) {   println("you tapped on \(recognizer.view) @ \(nsdate().timeintervalsince1970)") }

basically, clicking dimmed view or white part causes tapondimmedview called.

enter image description here

make view white color view.userinteractionenabled = true


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