如何使UIScrollview一次只顯示一個子視圖

Question

我遵循教程：https://www.youtube.com/watch?v=1_daE3IL_1s，教您如何在swift 3中創建快速聊天菜單，其中每次您在屏幕上刷新子視圖時，但它是唯一的一個，你需要滑動另一次來獲得下一個視圖。本教程是在swift 2中完成的，但是當我更新到swift 3時，scrollview現在就像普通的滾動視圖一樣流暢地滾動。有沒有什麼辦法解決這一問題？主視圖控制器

代碼：

class ViewController: UIViewController { 

    @IBOutlet weak var scrollView: UIScrollView! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     let V1: View1 = View1(nibName: "View1", bundle: nil) 
     let V2: View2 = View2(nibName: "View2", bundle: nil) 
     let V3: View3 = View3(nibName: "View3", bundle: nil) 

     V1.didMove(toParentViewController: self) 
     self.addChildViewController(V1) 
     self.scrollView.addSubview(V1.view) 

     V2.didMove(toParentViewController: self) 
     self.addChildViewController(V2) 
     self.scrollView.addSubview(V2.view) 

     V3.didMove(toParentViewController: self) 
     self.addChildViewController(V3) 
     self.scrollView.addSubview(V3.view) 

     var V2Frame: CGRect = V2.view.frame 
     V2Frame.origin.x = self.view.frame.width 
     V2.view.frame = V2Frame 

     var V3Frame: CGRect = V3.view.frame 
     V3Frame.origin.x = 2 * self.view.frame.width 
     V3.view.frame = V3Frame 

     self.scrollView.contentSize = CGSize(width: self.view.frame.width*3 , height: self.view.frame.size.height) 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

} 

Answer 1

啓用分頁：

override func viewDidLoad() { 
    super.viewDidLoad() 
    scrollView.isPagingEnabled = true 
    // ... 
}