swift - 封装对清除变量或常量的类型有何作用？

Question

我目前正在阅读 Apple 的“Intro to App Development with Swift”学生指南。在第 9 章“类型”的结尾测验中，它会问:

When you're reading code and aren't sure of the type of a variable or constant, what's the quickest way to find out?

答案是:

Rewrite the section of code using different encapsulation.

但是之前没有介绍过封装的概念，所以比较迷茫。在电子书的词汇表中，它指出:

A language mechanism for restricting access to some of the object components and/or a language construct that facilitates the bundling of data with the methods of operating on that data.

谁能解释这与查找变量或常量的类型有何关系？

提前致谢。

Answer 1

The answer is:

Rewrite the section of code using different encapsulation.

这是一个错误的答案。正确答案是"Use Xcode's [Quick Help] inspector."

Can anyone explain how this relates to finding out about the type of a variable or constant?

这里的建议是，如果您重写源代码以将私有(private)变量公开(即改变它的封装方式)，则可以更容易地找到相关变量的类型。