swift - 覆盖 Swift 中的属性

Question

我有一个像下面这样的类(class)

 class MainVC: UIViewController {

   lazy var someBtn: UIButton = {
    let button = UIButton(type: .system)
    button.translatesAutoresizingMaskIntoConstraints = false
    button.isHidden = true
    button.addTarget(self, action: #selector(didPressBtn), for: .touchUpInside)
    return button
   }()
 }

我继承了 MainVC，当我尝试覆盖 someBtn 时，错误消息显示为 Getter for 'someBtn' with Objective-C selector 'someBtn' conflicts with getter for 'someBtn' from superclass 'MainVC' with the same Objective-C selector

class SecondVC: MainVC {
   override var someBtn:UIButton = {
      return UIButton()
   }
}

Answer 1

你可以做一点改变:

class MainVC: UIViewController {
    lazy var someBtn: UIButton = createB()
    
    func createB() -> UIButton{
         let button = UIButton(type: .system)
         button.translatesAutoresizingMaskIntoConstraints = false
         button.isHidden = true
         return button
    }
}

class SecondVC: MainVC{
    override func createB() -> UIButton {
        return UIButton()
    }
}

转 property进入 method