使用 Swift IOS 在不同 ViewController 中的相同功能

Posted 2023-03-13

【中文标题】使用 Swift IOS 在不同 ViewController 中的相同功能

【英文标题】：Same Function in different ViewController using Swift IOS

【发布时间】：2020-03-26 10:13:29

【问题描述】：

  class FirstViewController : UiViewController 
      example("First Value","Second Value")

      func example(_ firstParameter: String, _ secondParameter: String) 
         var one = self.ValueOne[0].first
         var two = self.ValueTwo[0].second
         var three = ShareClass.Variable.value
         var four = keychain.get('name')
         var five = self.variableNameFive
         var six = firstParameter 
         var seven = secondParameter  
      
    
  class SecondViewController : UiViewController 
    example("Random String","Random Value String")

    func example(_ firstParameter: String, _ secondParameter: String) 
       var one = self.ValueOne[0].first
       var two = self.ValueTwo[0].second
       var three = ShareClass.Variable.value
       var four = keychain.get('name')
       var five = self.variableNameFive
       var six = firstParameter 
       var seven = secondParameter  
     
    
 class ThirdViewController : UiViewController 
    example("Dynamic String","Dynamic Value Type")

    func example(_ firstParameter: String, _ secondParameter: String) 
       var one = self.ValueOne[0].first
       var two = self.ValueTwo[0].second
       var three = ShareClass.Variable.value
       var four = keychain.get('name')
       var five = self.variableNameFive
       var six = firstParameter 
       var seven = secondParameter  
     
    
class FourthViewController : UiViewController 
    example("Complicated String","Complicated String Variable")

    func example(_ firstParameter: String, _ secondParameter: String) 
       var one = self.ValueOne[0].first
       var two = self.ValueTwo[0].second
       var three = ShareClass.Variable.value
       var four = keychain.get('name')
       var five = self.variableNameFive
       var six = firstParameter 
       var seven = secondParameter  
     
    

在上面的代码中，我编写了函数，该函数作为来自该特定视图控制器的变量值。

因为它是在各种视图控制器中重复的相同代码。 我试图将其编写为结构或类文件中的单个函数example() 并在不同的视图控制器中调用它。

旧方法遵循 UIViewController 扩展文件。有什么最好的方法来实现吗？

【参考方案1】：

你应该扩展你的 UIViewController 类。 您可以从所有 ViewController 中调用此示例方法。

extension UIViewController 
func example(_ firstParameter: String, _ secondParameter: String) 
    var one = self.ValueOne[0].first
    var two = self.ValueTwo[0].second
    var three = ShareClass.Variable.value
    var four = keychain.get('name')
    var five = self.variableNameFive
    var six = firstParameter
    var seven = secondParameter

或者正如 Vipin 所说，您可以创建一个自定义类。

class CustomClass: UIViewController 
    func example(_ firstParameter: String, _ secondParameter: String) 
        var one = self.ValueOne[0].first
        var two = self.ValueTwo[0].second
        var three = ShareClass.Variable.value
        var four = keychain.get('name')
        var five = self.variableNameFive
        var six = firstParameter
        var seven = secondParameter
       

在此之后，您可以像这样使用您的 ViewController：

class CustomViewController: CustomClass 
   //If you want to add VC specific actions to this method, you can override it
    override func example(_ firstParameter: String, _ secondParameter: String) 
        super.example(firstParameter, secondParameter)
        print("something more just for this VC")
    
    override func viewDidLoad() 
        super.viewDidLoad()
        example("First Param", "Second param")
    

【讨论】：

您可以创建一个基类，然后中断到所有类，这样您就可以轻松使用并且只在一个类中编写该代码意味着基类