swift4.1 - 如何制作可自定义的导航栏标题？斯威夫特 4

Question

我的 firstViewController 上有一个文本字段，我想要发生的是：一旦用户输入文本并转到 SecondViewController，它将成为导航栏标题。

我是编程新手，我希望有人可以帮助我。

Answer 1

导航创建视图控制器对象并通过导航控制器导航的第一种方法

let second = storyboard?.instantiateViewController(withIdentifier: "SecondViewController") as!  SecondViewController
second.title = textTitle.text!
navigationController?.pushViewController(second, animated: true)

从情节提要导航的第二种方式

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    guard  segue.identifier == "segueIdentifier" else { return }
        let destination = segue.destination as? SecondViewController
        destination?.strTitle = textTitle.text!
}

在第二个视图控制器中添加这个

var strTitle : String?

override func viewDidLoad() {
    super.viewDidLoad()
    self.title = strTitle ?? "default string"
}

Answer 2

您可以尝试@ChanWarde 的方式但呈现视图控制器而不是使用 segues 吗？

let second = storyboard?.instantiateViewController(withIdentifier: 
"SecondViewController") as!  SecondViewController
second.title = textTitle.text!
present(second, animated: true, completion: nil)

或尝试：

let second = storyboard?.instantiateViewController(withIdentifier: 
"SecondViewController") as!  SecondViewController
second.title = textTitle.text!

DispatchQueue.main.async(execute: {
UIApplication.shared.keyWindow?.rootViewController = second()
    self.dismiss(animated: true, completion: nil)
})