swift - How to add a custom border to viewcontroller (ios) -

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i have view (uipopoverpresentation) functionality works fine, need add custom border. i'm using borderwidth , bordercolor cannot seem find way make customized border, seen in photo below. how go creating customized border? make cgrect?


what need:

enter image description here


what have: enter image description here

i've attempted add image background of popover , resulted in this:
enter image description here

edit: //popoverview (presented using uipopoverpresentation)

    override func viewdidload() {     super.viewdidload()      self.view.layer.cornerradius = 10.0     self.view.layer.borderwidth = 1.5     self.view.layer.bordercolor = uicolor.whitecolor().cgcolor     self.navigationcontroller?.navigationbarhidden = true     self.popviewtableview.delegate = self     self.popviewtableview.datasource = self     self.popviewtableview.alwaysbouncevertical = false     self.popviewtableview.backgroundcolor =  uicolor(red: 151.0/255.0, green: 87.0/255.0, blue: 172.0/255.0, alpha: 1.0)   }   //base view controller.  when button pressed, function called presents popover func presentpopover() {      let contentview = uistoryboard(name: "main", bundle: nil).instantiateviewcontrollerwithidentifier("popviewcontroller") as! deckpopviewcontroller     contentview.modalpresentationstyle = uimodalpresentationstyle.popover     contentview.preferredcontentsize = cgsizemake(deckselectioncgrect.width, 160)      let popovermenuviewcontroller = contentview.popoverpresentationcontroller!     popovermenuviewcontroller.delegate = self     popovermenuviewcontroller.sourceview = view     popovermenuviewcontroller.permittedarrowdirections = uipopoverarrowdirection(rawvalue:0)      popovermenuviewcontroller.sourcerect = cgrectmake((self.view.bounds.width/2) - (deckselectioncgrect.width/2), 120, deckselectioncgrect.width, deckselectioncgrect.height)     presentviewcontroller(contentview, animated: true, completion: nil)  }  func adaptivepresentationstyleforpresentationcontroller(controller: uipresentationcontroller) -> uimodalpresentationstyle {     return uimodalpresentationstyle.none }  //also:  on third image, placed border imageview on entire view controller in storyboard, set padding 0 on sides (autolayout).  doesn't good, though.


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