swift - 快速访问navigationController subview 的项目

Question

这里是 ios 应用程序编码的新手，因此我们将不胜感激。

我有一个应用程序，当旋转到横向时会自动打开侧面菜单，我需要它来禁用导航 Controller subview 中的菜单按钮。这是我的代码。

导航 Controller

import Foundation
class GDNavigationController:UINavigationController{
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        //Send notification when the device is rotated.
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "rotated", name: UIDeviceOrientationDidChangeNotification, object: nil)
    }

    func rotated(){
        /*
        Put the code here to access the menu button
        */
        if(UIDeviceOrientationIsLandscape(UIDevice.currentDevice().orientation))
        {
            //disable the menu button here
            self.revealViewController().setFrontViewPosition(FrontViewPosition.Right, animated: false)
        }

        if(UIDeviceOrientationIsPortrait(UIDevice.currentDevice().orientation))
        {
            //enable the menu button here
            self.revealViewController().setFrontViewPosition(FrontViewPosition.Left, animated: false)
        }
    }
}

我的ViewController代码

import Foundation
class LocalCollectionController: UICollectionViewController{      
    @IBOutlet var MenuViewButton: UIBarButtonItem!
    override func viewDidLoad() {
        MenuViewButton.target = self.revealViewController()
        MenuViewButton.action = Selector("revealToggle:")
    }  
}

根据选择的菜单项，我有不同的导航 Controller 加载不同的 View Controller 。不同的 navigationController 共享相同的子类，但我永远不知道加载了哪个 viewController，这就是我需要找出的内容以及如何访问该 viewController 中的按钮。

有人可以帮忙吗？

Answer 1

所以我想通了，将我的导航 Controller 更改为这个

导入基础类 GDNavigationController:UINavigationController{

var BBItem = UIBarButtonItem()
override func viewDidAppear(animated: Bool) {
    BBItem = self.topViewController.navigationItem.leftBarButtonItem!

}

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(animated)
    //Send notification when the device is rotated.
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "rotated", name: UIDeviceOrientationDidChangeNotification, object: nil)
    self.rotated()
}


func rotated(){

    if(UIDeviceOrientationIsLandscape(UIDevice.currentDevice().orientation))
    {
        self.revealViewController().setFrontViewPosition(FrontViewPosition.Right, animated: true)
        self.BBItem.enabled = false
    }

    if(UIDeviceOrientationIsPortrait(UIDevice.currentDevice().orientation))
    {
        self.revealViewController().setFrontViewPosition(FrontViewPosition.Left, animated: true)
        self.BBItem.enabled = true
    }

}

}