Set date modified of files in Cocoa

How can I set the da开发者_运维知识库te modified attribute of a file in Cocoa? Thanks

What about NSFileManager setAttributes:ofItemAtPath:error: method?

http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSFileManager_Class/Reference/Reference.html

Attributes are a dictionary. You can set a modification date value with the NSFileModificationDate key.

Basically:

NSDictionary* attr = [NSDictionary dictionaryWithObjectsAndKeys: yourDate, NSFileModificationDate, NULL];

[[NSFileManager defaultManager] setAttributes: attr ofItemAtPath: yourPath error: NULL];