ios - My ViewControllers is not dismissing properly -


i have, 3 viewcontrollers, idea is, viewcontroller viewonecontroller, , viewtwocontroler, want go viewcontroller directly, when do, memory goes little bit, viewcontrollerdelegate

protocol viewcontrollerdelegate{  func viewcontrollerdidfinish(controller: viewcontroller)  }

this viewtwo trying go viewcontroller

protocol viewtwodelegate{  func viewtwodidfinish(controller: viewtwo)  }  class viewtwo: uiviewcontroller, viewcontrollerdelegate {     var button: uibutton!     var delegate: viewtwodelegate? = nil     override func viewdidload() {         super.viewdidload()      button = uibutton.buttonwithtype(uibuttontype.system) as! uibutton     button.frame = cgrectmake(self.view.frame.size.width/2 - button.frame.size.width, 100, 250, 50)     button.layer.cornerradius = 3     button.backgroundcolor = uicolor.bluecolor()     button.center.x = self.view.center.x     button.settitle("viewcontroller", forstate: uicontrolstate.normal)     button.addtarget(self, action: "viewcontrolleraction:", forcontrolevents: uicontrolevents.touchupinside)     button.tintcolor = uicolor.whitecolor()     view.addsubview(button) }  func viewcontrolleraction(sender: uibutton!){     var materialsviewcontroller: viewcontroller = uistoryboard(name: "main", bundle: nil).instantiateviewcontrollerwithidentifier("view") as! viewcontroller     self.presentviewcontroller(materialsviewcontroller, animated: true, completion: nil)  }  func viewcontrollerdidfinish(controller: viewcontroller){     self.dismissviewcontrolleranimated(true, completion: nil) }

other 2 controllers same

edit: tried 

self.dismissviewcontrolleranimated(true, completion: { () -> void in         self.presentingviewcontroller?.dismissviewcontrolleranimated(true, completion: nil)     })

and dismisses not presented, when tried this

self.dismissviewcontrolleranimated(true, completion: nil) self.presentingviewcontroller?.dismissviewcontrolleranimated(true, completion: nil)

it works, 2 viewcontrollers, if need more?

i need help, please


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