ios - 如何一次将更改应用于多个 View Controller ？

Question

(例如)一次在多个 View Controller 中包含一行的最佳方法是什么(例如，在每个 VC 中的 ViewDidLoad 下包含一行代码)？

我只是在寻找一种比在 10 个不同的 VC 中复制粘贴更有效的方法

Answer 1

继承将帮助您:

class BaseViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        // your settings for all view controllers here:
        self.view.backgroundColor = UIColor.lightGrayColor()
    }
}

class HomeViewController: BaseViewController {
    override func viewDidLoad() {
        super.viewDidLoad() // call code from BaseViewController.viewDidLoad()
    }
}

class ChatViewController: BaseViewController {
    override func viewDidLoad() {
        super.viewDidLoad() // call code from BaseViewController.viewDidLoad()
    }
}

class ProfileViewController: BaseViewController {
    override func viewDidLoad() {
        super.viewDidLoad() // call code from BaseViewController.viewDidLoad()
    }
}

另一种选择是 Swift 扩展:

extension UIViewController {
    func configureView() {
        self.view.backgroundColor = UIColor.lightGrayColor()
    }
}

class HomeViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        configureView()
    }
}

class ChatViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        configureView()
    }
}

class ProfileViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        configureView()
    }
}

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