ios – 如何在Swift 3中比较UIViewController？

概述我想在 Swift 3中与UIViewController进行比较,但是有一些错误 extension UINavigationController{ func myPopToViewController(viewController:UIViewController, animated:Bool) -> UIViewController? { var arrViewCo 我想在 Swift 3中与UIVIEwController进行比较,但是有一些错误

extension UINavigationController{    func myPopToVIEwController(vIEwController:UIVIEwController,animated:Bool) -> UIVIEwController? {        var arrVIEwControllers:[UIVIEwController] = []        arrVIEwControllers = self.vIEwControllers        for vc:UIVIEwController in arrVIEwControllers {            if(vc.isKind(of: vIEwController) ) // This line gives me error            {                return (self.navigationController?.popToVIEwController(vc,animated: animated)?.last)!            }        }        return nil    }}

/Users/varunnaharia/documents/Projects/appname/appname/Public/UINavigationController+Extra.swift:18:30: Cannot convert value of type ‘UIVIEwController’ to expected argument type ‘AnyClass’ (aka ‘AnyObject.Type’)

如果尝试使用

if(vc is vIEwController)

它给

/Users/varunnaharia/documents/Projects/appname/appname/Public/UINavigationController+Extra.swift:18:22: Use of undeclared type ‘vIEwController’

我通过这个称呼它

self.navigationController?.popOrPopToVIEwController(vIEwController: MyUIVIEwController(),animated: false)

解决方法 如果要与特定视图控制器进行比较,则必须比较它们的参考.

试试这个…

if(vc === vIEwController) ){    return (self.navigationController?.popToVIEwController(vc,animated: animated)?.last)!}

总结

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