如何在Swift中从第一个ViewController隐藏导航栏？

如果您知道其他所有视图都应显示该栏，则可以

viewWillDisappear

在Swift中：

override func viewWillAppear(_ animated: Bool) {    super.viewWillAppear(animated)    navigationController?.setNavigationBarHidden(true, animated: animated)}override func viewWillDisappear(_ animated: Bool) {    super.viewWillDisappear(animated)    navigationController?.setNavigationBarHidden(false, animated: animated)}