我是macosX开发的新手，我下载了一个开源的mac应用程序，但我无法理解cocoa程序的执行流程。所以任何人都可以简单地解释通用cocoa程序中的程序流程。
提前感谢
从main开始。它不太可能包含任何有趣的内容，但值得检查一下，以防万一。很可能，它只包含对NSApplicationMain的调用，该调用将创建NSApplication对象并向其发送运行消息。这就是让应用程序运行的原因，而这个方法将在进程的其余部分运行。
然后查看MainMenu笔尖。加载这是应用程序要做的第一件事。这里任何设置为“启动时可见”的窗口都会立即出现；更重要的是，应用程序委托可能会在这里。检查应用程序的或文件所有者的（应用程序在此笔尖中同时存在，因此您需要同时检查两者）delegate出口，如果其中一个已连接，请按照连接进行操作。查看该对象是哪个类的实例。
找到应用程序委托类后，在Xcode中打开它。浏览应用程序委托方法的列表，找到实现的方法，并读取实现的方法。应用程序：…完成启动：双胞胎在进程开始时尤为重要。
从那里开始，一切都只是阅读代码，看看它做了什么，然后去它带你去的地方。
Peter的回答很好——我还想检查一下wakeFromNib的实现，尤其是从MainMenu.nib加载的对象。无论对错，你经常会发现这个方法中隐藏着有趣的东西。
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