如何快速识别被调用方法中的调用方法 [英] How to identify calling method from a called method in swift

问题描述

这是一个场景

func callingMethod_A {
  self.someCalculation()
}

func callingMethod_B{
  self.someCalculation()
}

func someCalculation{
//how to find who called this method? is it callingMethod_A or _B at runtime?
//bla bla
}

我们如何获得在运行时调用它的方法名称.
谢谢.

how can we get the method name that called it during run time.
thank you.

推荐答案

无论如何我都为Swift代码设计了一种方法:

I worked out a way to do this, for Swift code anyway:

定义String参数callingFunction，并将其默认值设置为#function.不要传递任何来自调用方的信息，编译器会提供调用函数的名称.

Define a String parameter callingFunction and give it a default value of #function. Do not pass anything from the caller and the compiler provides the calling function name.

以@ Anu.Krthik的答案为基础:

Building on @Anu.Krthik's answer:

func someCalculation (parameter: String, callingMethod: String = #function ) {
 print("In `\(#function)`, called by `\(callingMethod)`")
}

func foo(string: String) {
    someCalculation(parameter: string)
}

foo(string: "bar")

上面的照片

In `someCalculation(parameter:callingMethod:)`, called by `foo(string:)`

但是，请注意，如果调用方为callingFunction参数提供值，则可以颠覆该技术.如果您使用以下方式调用它:

However, beware that this technique can be subverted if the caller provides a value for the callingFunction parameter. if you call it with:

func foo(string: String) {
    someCalculation(parameter: string, callingMethod: "bogusFunctionName()")
}

您将获得输出

In `someCalculation(parameter:callingMethod:)`, called by `bogusFunctionName()`

相反.

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