ios - Swift:将 "Back"作为默认按钮文本设置为 "segue back"按钮

Question

我正在寻找一种方法将所有后退按钮文本设置为“后退”，而不是默认显示 segue 来自的 View 的标题。

我有多个 View 和 segue，希望有比在所有 View Controller 中使用 PrepareForSegue 更简洁的方法。

这也会简化本地化，因为我让用户能够更改语言。

有人有任何建议或解决方案吗？

Answer 1

为 UIViewController 创建扩展(您可以为此创建不同的空文件，并确保导入 UIKIt)-:

import UIKit
extension UIViewController  {


    func leftBarButton(subView:UIView,labelView:UILabel,imageView:UIImageView) -> UIBarButtonItem{

        let leftBarButton = UIBarButtonItem(customView: subView)
        subView.frame = CGRect(x: 0, y: 0, width: 100, height: 40)
        subView.addSubview(imageView)
        subView.addSubview(labelView)

        imageView.leftAnchor.constraint(equalTo: subView.leftAnchor,constant: -8).isActive = true
        imageView.topAnchor.constraint(equalTo: subView.topAnchor, constant: 2).isActive = true
        imageView.heightAnchor.constraint(equalToConstant: 30).isActive = true
        imageView.widthAnchor.constraint(equalToConstant: 30).isActive = true

        labelView.leftAnchor.constraint(equalTo: imageView.rightAnchor,constant: 8).isActive  = true
        labelView.rightAnchor.constraint(equalTo: subView.rightAnchor).isActive = true
        labelView.topAnchor.constraint(equalTo: subView.topAnchor).isActive = true
        labelView.heightAnchor.constraint(equalToConstant: 40).isActive = true

        return leftBarButton
    }

    func anotherMethod(){
       _ =  self.navigationController?.popViewController(animated: true)
    }
}

在 Controller 类中-:

  var views : UIView = {
        let subView = UIView()
        //subView.backgroundColor = UIColor.green
        return subView
    }()

    var imageView : UIImageView = {
        var view = UIImageView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.image = UIImage(named: "Back")
        return view
    }()

    var labelView: UILabel = {
        var labeView = UILabel()
        labeView.translatesAutoresizingMaskIntoConstraints = false
        labeView.text = "Back"
        labeView.textColor = UIColor.blue
        return labeView
    }()

    // ViewDidLoad
    override func viewDidLoad() {
        super.viewDidLoad()
        //self.navigationBar.tintColor = UIColor.green
       self.navigationItem.leftBarButtonItem = leftBarButton(subView: views, labelView: labelView, imageView: imageView)


    }