自定义 UINavigationController

import Foundation

import UIKit

@objc

class BaseNavigationController: UINavigationController {

    

    var childCtr: UIViewController?

    

    override func viewDidLoad() {

        self.navigationBar.hidden =true

        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

    }

}

//状态栏的颜色

import Foundation

import UIKit

class BaseLightNavigationController: BaseNavigationController {

    

    //调整statusbar颜色

    override func preferredStatusBarStyle() ->UIStatusBarStyle {

        returnUIStatusBarStyle.LightContent

    }

    

}

//使用

let ctr =viewCotroller()

let navController = BaseLightNavigationController()

navController.childCtr = ctr

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