ios - 返回根导航 Controller 的按钮

Question

我正在使用 Storyboard并拥有 3 个 VC。当我使用 VC3 时，我希望后退按钮可以跳过 VC2 并转到 VC1。

我尝试了以下方法，但 VC2 在到达 VC1 之前闪烁

override func viewWillDisappear(_ animated: Bool) {
    self.navigationController?.popViewController(animated: true)
}

我的自定义返回代码:

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
    self.navigationController?.navigationBar.shadowImage = UIImage()
    self.navigationController?.navigationBar.isTranslucent = true
    self.navigationController?.navigationBar.backIndicatorImage = UIImage(named: "arrow_back")
    self.navigationController?.navigationBar.backIndicatorTransitionMaskImage = UIImage(named: "arrow_back")
    self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: #selector(self.backPressed(_:)))
    self.navigationController?.navigationBar.barStyle = .black  
}

@objc func backPressed(_ sender: Any){
    print("here")
    self.navigationController?.popToRootViewController(animated: false)
}

Answer 1

viewDidLoad 的变化

override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
    self.navigationController?.navigationBar.shadowImage = UIImage()
    self.navigationController?.navigationBar.isTranslucent = true
    self.navigationController?.navigationBar.backIndicatorImage = UIImage(named: "arrow_back")
    self.navigationController?.navigationBar.backIndicatorTransitionMaskImage = UIImage(named: "arrow_back")

     var backButton = UIBarButtonItem(title: "", style: .plain, target: self, action: #selector(backPressed(_:)))
     navigationController?.navigationBar.topItem?.backBarButtonItem = backButton
    self.navigationController?.navigationBar.barStyle = .black  
}

添加 如果你想首先使用 Controller

@objc func backPressed(_ sender: Any){
     self.navigationController?.popToRootViewController(animated: true) 
}

如果它不是导航 Controller 中的第一个 View Controller

@objc func backPressed(_ sender: Any){
     let controllerToBeReached = navigationController!.viewControllers.filter { $0 is YourViewController }.first!
     navigationController!.popToViewController(controllerToBeReached, animated: true)
}