可可监视一个文件的修改 [英] Cocoa Monitor a file for modifications

问题描述

我有一个指向特定文件的文件路径，我希望在文件发生更改（其内容已被修改）时通知注册。

谷歌搜索，我找不到明确的答案。我已经尝试过使用kqueue和NSWorkspace，但是并没有取得太大的成功。

有什么方法可以做到这一点？

谢谢！

实现非常简单：

• 让你的控制器成为 VDKQueueDelegate ;
  
• declare VDKQueue * ivar / property;
  
• 设置委托方法 VDKQueue：receivedNotification：forPath：
• 

• 初始化队列并将其委托设置为控制器本身;

• 用添加资源来监视addPath ：notifyAbout：。



然后在委托方法中做您的业务。 $ b

I have a file path to a specific file and I want to register to be notified whenever that file changes (its contents have been modified).

I have tried searching google and I can't find a clear answer. I have experimented with kqueue and NSWorkspace but have not had much success.

What is the proper way to do this?

Thanks!

解决方案

I am using VDKQueue right now - author says it's a refactored and more performant version of UKKQueue.

Implementation was pretty straightforward:

• let your controller be the VDKQueueDelegate;
• declare a VDKQueue* ivar / property;
• setup delegate method VDKQueue:receivedNotification:forPath:;
• init the queue and set its delegate to the controller itself;
• add resources to watch with addPath:notifyingAbout:.

Then just do your business in the delegate method.

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