//新增一個BaseNavigation，可以從不同介面跳轉到同一個介面，同一個介面的回退方式：

self.dismissViewControllerAnimated(true, completion:nil)

import Foundation

import UIKit

@objc

class BaseNavigationController: UINavigationController {

    var childCtr: UIViewController?

    override func viewDidLoad() {

self.navigationBar.hidden =

        if let ctr =childCtr {

self.addChildViewController(ctr)

        }

    }

    override func popViewControllerAnimated(animated: Bool) -> UIViewController? {

ifself.childViewControllers.count ==1 {

dismissViewControllerAnimated(true, completion:nil)

            return nil

        }else

returnsuper.popViewControllerAnimated(animated)

        }

    }

    func addBasicChildViewController(ctr: UIViewController) {

        self.childCtr = ctr

    }

}

//頂部狀態列的顏色

import Foundation

import UIKit

class BaseLightNavigationController: BaseNavigationController {

    override func preferredStatusBarStyle() -> UIStatusBarStyle

returnUIStatusBarStyle.LightContent

    }

}

//animated:時候開啟動畫效果

let ctr = UIStoryboard(name:"LogIn_6p", bundle:nil).instantiateViewControllerWithIdentifier("loginMyselfNavigationController_6p")as!UINavigationController

let navController = BaseLightNavigationController()

navController.childCtr = ctr

self.presentViewController(navController, animated:true, completion:nil)

//pushViewController跳轉方式禁用，presentViewController跳轉方式是新開一個棧，對應返回是

self.navigationController?.dismissViewControllerAnimated(true, completion: nil)

showViewController在已有的棧上跳轉，對應的返回是

返回根頁面vc用 ：

返回指定的某個vc用下面（通過index定位）