On 25 Mar 2014, at 12:52, Colas B <colasj...@yahoo.fr> wrote: > Hi, I am having troubles using NSFileWrapper. In order to have a better > understanding of it, I would like to ask you the following question. > > Is there a difference between > > NSURL *referenceURL, *destinationURL ; > > [[[NSFileManager alloc] init] copyItemAtURL:referenceURL > toURL:destinationURL > error:NULL] ; > > and > > NSURL *referenceURL, *destinationURL ; > NSFileWrapperWritingOptions options ; > > NSFileWrapper * fileWrapper = [[NSFileWrapper alloc] > initWithURL:referenceURL > options:0 > error:NULL] ; > [fileWrapper writeToURL:destinationURL > options:options > originalContentsURL:nil > error:NULL] ; > > (especially, depending on the values of options; what would be the best > choice for options here?)? > > Again, I ask this question in order to understand better NSFileWrapper. I see > that I have the choice in my code to use one or the other. I guess the answer > might involve considerations about "hard links".
Yes, there's a difference. NSFileManager will copy the file/folder in whatever manner it sees fit. Internally this is likely to be by copying chunks of the file(s) into memory and then writing that back out. NSFileWrapper, with the arguments you've specified will instead read the entire file/folder into memory, and then write that back out to disk. That data will be kept in memory until the file wrapper is deallocated, or you explicitly ask it to read from disk again. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
