[swift]Navigation Controller (1) 畫面切換

• 先拉一個Navigation Controller到StoryBoard,並將起始指標指向它
  

• 接著拉個ViewA並且設定他為root view並且執行看看
  
  執行結果首頁就是剛剛指定root view的那一頁了
  

• 接著在拉第二個ViewB,並將ViewA與ViewB做Push的關聯
  

  接著設定這個push segue的identifier
  

• 在ViewA做已下修改 ```swift
  import UIKit
  class Page_A_ViewController: UIViewController {

  override func viewDidLoad() {
  super.viewDidLoad()
  //NavBar
  self.navigationController?.navigationBar.barTintColor = UIColor(red: 0.58, green: 0.761, blue: 0.231, alpha: 1)
  let titleDic : NSDictionary = [NSForegroundColorAttributeName : UIColor.whiteColor()]; //字的顏色
  self.navigationController?.navigationBar.titleTextAttributes = titleDic;
  self.navigationController?.navigationBar.tintColor = UIColor.whiteColor() //按鈕的顏色
  //設定右上角的按鈕let barOptionIcon : UIBarButtonItem = UIBarButtonItem(image: UIImage(named: “icon-options”), style: UIBarButtonItemStyle.Plain, target: self, action: “PushToOptionController:”);
  self.navigationController?.navigationBar.topItem?.setRightBarButtonItem(barOptionIcon, animated: true) ;
  }

  //右上角Button按下時觸發的事件
  func PushToOptionController(sender: UIBarButtonItem) {
  self.performSegueWithIdentifier(“toPageB”, sender: self);
  }

  }

```

• 完成後試試看,點擊右上角的按鈕即可跳到第二頁了！！