如何重寫viewWillDisappear在Swift3

Question

我試圖隱藏第一導航欄並顯示所有其他人，所以我用：

override func viewWillAppear(_ animated: Bool) { 
    // Hide the navigation bar on the this view controller 
    self.navigationController?.setNavigationBarHidden(true, animated: true) 
} 

override func viewWillDisappear(_ animated: Bool) { 
    // Show the navigation bar on other view controllers 
    self.navigationController?.setNavigationBarHidden(false, animated: true) 
} 

我現在需要的是調用父類的方法：super.viewWillAppear(animated)和super.viewWillDisappear(animated) ，但我不知道在哪裏或如何，有什麼建議？

Answer 1

您的代碼看起來像

override func viewWillAppear(_ animated: Bool) { 
    super. viewWillAppear(animated) 
    // Hide the navigation bar on the this view controller 
    self.navigationController?.setNavigationBarHidden(true, animated: true) 
} 

override func viewWillDisappear(_ animated: Bool) { 
    super. viewWillDisappear(animated) 
    // Show the navigation bar on other view controllers 
    self.navigationController?.setNavigationBarHidden(false, animated: true) 
}