通过NSFileManager获取元数据 [英] Getting metadata by NSFileManager

问题描述

我正在与NSFileManager一起使用，我能够获取文件的最新更新，创建日期等信息，但是我无法获取文件的上次打开时间.有什么方法可以获取这些信息?

I am working with NSFileManager and I am able to get the file's last update, creation date, ... but I am not able to get when was the last time the file was opened. Is there any way to get this information?

还有另一个问题，我通过pathExtension属性获得了MIME，但是通过这种方式，我得到了例如.pdf，.doc等...，而不是application/pdf，application/doc，text/txt，audio/vmw， ...有什么方法可以自动获取此信息?

And other question, I get the MIME by the pathExtension property, but this way I get for example .pdf, .doc, ... instead of application/pdf, application/doc, text/txt, audio/vmw, ...is any way to get this information automatically?

非常感谢！

推荐答案

使用Spotlight的MDItem API获取所有信息

Use Spotlight's MDItem API to get all the info

NSString *path = @"/Users/dominik/Downloads/Screen Shot 2013-11-28 at 13.26.04.png";
MDItemRef item = MDItemCreate(NULL, (CFStringRef)path);
NSArray *attributes = (NSArray*)CFBridgingRelease(MDItemCopyAttributeNames(item));
NSDate *date = (NSDate*)CFBridgingRelease(MDItemCopyAttribute(item, kMDItemLastUsedDate));
CFRelease(item);
NSLog(@"%@",attributes);
NSLog(@"%@",date);

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