为什么 Objective-C 文件使用 .m 扩展名？
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Why do Objective-C files use the .m extension?
提问by Kuba Suder
Since I started learning Objective-C and Cocoa, I've been wondering why they have chosen the extension .m for the implementation files - was it supposed to mean something, or was it just a random letter?
自从我开始学习 Objective-C 和 Cocoa 以来，我一直想知道为什么他们为实现文件选择了扩展名 .m - 它应该是什么意思，还是只是一个随机字母？
回答by splattne
Today most people would refer to them as "method files", but
今天大多数人会称它们为“方法文件”，但是
"The .m extension originally stood for "messages" when Objective-C was first introduced, referring to a central feature of Objective-C [...]"
“包括.m的最初代表”米essages“时Objective-C的首次引入，参照目标C的核心特征[...]”
(from the book "Learn Objective-C on the Mac" by Mark Dalrymple and Scott Knaster, page 9)
（来自Mark Dalrymple 和 Scott Knaster 的“ Learn Objective-C on the Mac”一书，第 9 页）
EDIT:To satisfy an itch I emailed Brad Cox, the inventor of Objective-C, about the question and he answered with this single line:
编辑：为了满足我的渴望，我给Objective-C 的发明者Brad Cox发了一封电子邮件，关于这个问题，他用这行回答：
"Because .o and .c were taken. Simple as that."
“因为 .o 和 .c 被占用了。就这么简单。”
Here's the email as visual proof:
这是电子邮件作为视觉证明：
回答by Adam Rosenfield
It stands for "methods". From the comp.lang.objective-C FAQ:
它代表“方法”。来自comp.lang.objective-C 常见问题解答：
The organisation of Objective-C source is typically similar to that of C or C++ source code, with declarations and object interfaces going into headerfiles named with a .h extension, and definitions and object implementations going in files named with a .m (short for methods) extension.
Objective-C 源代码的组织通常类似于 C 或 C++ 源代码的组织，声明和对象接口进入以 .h 扩展名命名的头文件，定义和对象实现进入以 .m 命名的文件（简称对于方法）扩展名。
回答by baker1990
.m files contain the (m)ethods. Possible reason?
.m 文件包含 (m) 方法。可能的原因？
回答by Martin Kersten
Wild guess: 1983 was ObjectC introduced along with the first Macintosh computer... . So it might be m as in macintosh or m as in methods or even both.
疯狂猜测：1983 年 ObjectC 与第一台 Macintosh 计算机一起推出...... 所以它可能是 m 就像在 macintosh 中一样，也可能是 m 在方法中，甚至两者都是。
