ios - 使用 NavigationBar 返回

Question

你好，我在 Viewcontroller B 及其 NavigationBar 中，在 Viewcontroller B 中按下的按钮转到 Viewcontroller C(我不想在 Viewcontroller C 中使用 NavigationBar)

let vc = self.storyboard?.instantiateViewController(withIdentifier: "viewC") as! ViewcontrollerC
    vc.passAction = "saveedit"
    vc.passName = passName
    self.present(vc, animated: true, completion: nil)

当我在 ViewcontrollerC 中单击保存按钮时，我应该使用 ViewcontrollerB NavigationBar 返回到 ViewcontrollerB

let vc = self.storyboard?.instantiateViewController(withIdentifier: "viewB") as! ViewcontrollerB
            vc.passName = "\(firstNameTxt.text!)\(" ")\(lastNameTxt.text!)"
             self.present(vc, animated: false, completion: nil)

这里的问题是，当我返回 ViewcontrollerB 时，我在那里看不到 NavigationBar。

已编辑

class ViewcontrollerB : UpdateDataDelegate {

  override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated);
        self.navigationController?.isNavigationBarHidden = false
    }


@IBAction func click_edit(_ sender: Any) {

    let vc = self.storyboard?.instantiateViewController(withIdentifier: "patientPersonalData") as! patientPersonalDataVC
    vc.passName = passName
    vc.passAction = "saveedit"

    self.navigationController?.pushViewController(vc, animated: true)

  }  

func loadData() {

}
}

// View Controller C

protocol UpdateDataDelegate {
    func loadData()
}
 class Viewcontroller C {
 var delegate: UpdateDataDelegate?

 override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        self.navigationController?.isNavigationBarHidden = true
    }

fun click_save() {
self.navigationController?.popViewController(animated: true)
 self.delegate?.loadData()
}

Answer 1

看来你新建了一个ViewcontrollerB。试试这个返回到 ViewcontrollerB。

self.dismiss(animated: true, completion: nil)