當我重新打開高度時，子視圖控制器會調整大小

Question

我有3個視圖控制器，我想在scrollview，snapchat樣式中嵌入（因此您可以在它們之間滑動）。但我現在面臨一個非常奇怪的問題，在導航欄出現壓扁對狀態欄，

但是當我離開應用程序（進入主屏幕爲例）回來，下移。

這裏是我的代碼：

 let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main) 

     self.mainScrollView.delaysContentTouches = false 

     let v1 = storyboard.instantiateViewController(withIdentifier: "profileViewController") as! profileViewController 

     self.addChildViewController(v1) 
     self.mainScrollView.addSubview(v1.view) 
     v1.didMove(toParentViewController: self) 

     //-------- 

     let v2 : recordViewController = recordViewController(nibName: "recordViewController", bundle: nil) 

     self.addChildViewController(v2) 
     self.mainScrollView.addSubview(v2.view) 
     v2.didMove(toParentViewController: self) 

     //-------- 

     let v3 = storyboard.instantiateViewController(withIdentifier: "discoverViewController") as! discoverViewController 

     self.addChildViewController(v3) 
     self.mainScrollView.addSubview(v3.view) 
     v3.didMove(toParentViewController: self) 


     //-------- 
     var v1frame : CGRect = self.mainScrollView.bounds 
     v1frame.origin.x = 0 
     v1.view.frame = v1frame 
     //v1.view.bindFrameToSuperviewBounds() 

     var v2frame : CGRect = self.mainScrollView.bounds 
     v2frame.origin.x = self.view.frame.width 
     v2.view.frame = v2frame 

     var v3frame : CGRect = self.mainScrollView.bounds 
     v3frame.origin.x = self.view.frame.width*2 
     v3.view.frame = v3frame 

我的解決方案，至今已編程添加約束，但我想不出什麼我要補充約束。這是我試過的

let csH = NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[v]-0-|", options: [], metrics: [:], views: ["v": recordView]) 
    let csV = NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[v]-0-|", options: [], metrics: [:], views: ["v": recordView]) 

    view.addConstraints(csH) 
    view.addConstraints(csV) 

Answer 1

選擇您想要編輯的字段。進行設置，如圖片。我希望它有幫助。