如何从navigationController的viewControllers中删除特殊控制器？

Question

我想写一个class方法与两个params删除viewController从navigation controller，但我不知道如何处理它。

我的代码是下面，我测试过，没有成功：

class func removeVC(_ fromNav:UINavigationController, _ controller:UIViewController) { 

    let controllers:NSArray = fromNav.viewControllers as NSArray 
    for item in controllers { 

     if (item as AnyObject).isMember(of:controller) { // There is not pass by Xcode 

      // remove item out of fromNav.viewControllers 
     } 
    } 
} 

如何判断controller的class等于帕拉姆controller在swift？

Answer 1

尝试这样

方法1）

class func removeVC(fromNav: UINavigationController, controller: UIViewController) { 

    let controllers = fromNav.viewControllers 
    for item in controllers { 

     if item == controller { 
      fromNav.viewControllers.remove(at: fromNav.viewControllers.index(of: item)!) 
     } 

    } 
} 

用法：UtilSwift.navRemoveVC(self.navigationController!, self)

方法2）：

class func navRemoveVC(_ fromNav:UINavigationController, withControllerClass:AnyClass) { 

    let controllers = fromNav.viewControllers 
    for item in controllers { 
     if (item as AnyObject).isKind(of: withControllerClass.self) { 
      fromNav.viewControllers.remove(at: fromNav.viewControllers.index(of: item)!) 
     } 
    } 
} 

用法：UtilSwift.navRemoveVC(self.navigationController!, withControllerClass:UserRegisterViewController.self)

Answer 2

你可以试试这个：

if (item as AnyObject).isKind(of: UIViewController.self){ 
     // remove item out of fromNav.viewControllers 
    }