Question

在我的项目中，UINavigationController有三个嵌入式UIViewController。在第一个我将balanceLabel和refreshButton添加到导航栏。当点击按钮时，第一个视图控制器发送网址请求并在标签上显示返回值。

@IBAction func refreshButtonAction(_ sender: UIBarButtonItem) {

let operation = GetInfoOperation(...)

operation.completionBlock = { [weak self] in

  DispatchQueue.main.async {

    guard let balance = operation.output?.value?.balance else { return }
    self?.balanceLabel.text = balance
    let significantDigits = Int(Double(balance.toInt64!) * pow(10, -10))

  }
}
queue.addOperation(operation)

}

如何在每个ViewController中没有重复@IBAction func refreshButtonAction(_ sender: UIBarButtonItem)的其他ViewControllers上获得相同的行为？

Answer 1

您可以使用继承

按扩展名对其进行归档

使用您想要的所有常用功能创建所需的视图控制器，然后直接从UIViewController继承继承该基本viewController

您的基本控制器BaseViewController

class BaseViewController: UIViewController {
   //all comman functionallity 
   //add your button here 
}

class ChildOneViewController: BaseViewController {
   //this class will get all the functionality from BaseViewController
   //you can access the BaseViewController button here
   //add function for ChildOneViewController
}

 class ChildtwoViewController: BaseViewController {
   //this class will get all the functionality from BaseViewController
   //you can access the BaseViewController button here
   //add function for ChildtwoViewController
}

重复使用导航栏按钮

1 个答案: