如何在应用程序(外部框架)中覆盖内部框架方法

问题描述

在Swift中进行子类化时，是否仍要覆盖内部框架方法?前任.超类

Is there anyway to override internal framework method when subclassing in Swift? Ex. Superclass

public class BarChartRenderer: ChartDataRendererBase {
   internal func drawDataSet(context context: CGContext, dataSet: BarChartDataSet, index: Int) {
             ...
   }
}

我想重写此方法以绘制与dataSet不同的图形(iOS图表)

and I want to override this method to draw differently that dataSet (iOS-Charts)

public class ESBarChartRenderer: BarChartRenderer {
   overide func drawDataSet(context context: CGContext, dataSet: BarChartDataSet, index: Int) {
             ...
   }
}

但是当我尝试覆盖Xcode时出现错误:

but when I'm trying to override Xcode gives me error:

因为它是内部的.

还有一个我需要访问的内部变量，与上面的Xcode一样看不到它.

There is also one internal variable with I need access to and same as above Xcode can't see it.

推荐答案

您应该使用open关键字而不是public

You should use the open keyword instead of public

在此处检查访问控制: https://developer.apple.com/library/内容/文档/Swift/概念/Swift_Programming_Language/AccessControl.html

Check the the Access Control here:https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/AccessControl.html

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