self.addChild(pageMenuController!)。Method 'viewDidAppear' in the childviewcontroller is executed twice

[LCBbest]

if add this code self.addChild(pageMenuController!)。Method 'viewDidAppear' in the childviewcontroller is executed twice。How to solve it

code

  self.addChild(pageMenuController!)
  self.view.addSubview(pageMenuController!.view)
  pageMenuController!.didMove(toParent: self)

childcontroller

override func viewDidAppear(_ animated: Bool) {
     //executed twice
      print("hello")
}

[vudinhdjv]

I see that in file CAPSPageMenu+UIConfiguration.swift line 165 -> 170

if index == 0.0 {
    // Add first two controllers to scrollview and as child view controller
    controller.viewWillAppear(true)
    addPageAtIndex(0)
    controller.viewDidAppear(true)
    }

controller call viewWillAppear(true) and viewDidAppear(true). They also will be called when controller loaded. so that is reason why method viewDidAppear is executed twice. I don't know why we need to call two function in file CAPSPageMenu+UIConfiguration.swift .