Relative URLs, and string encodings
Relative URLs, and string encodings
- Subject: Relative URLs, and string encodings
- From: Jonathan Taylor <email@hidden>
- Date: Thu, 1 Jun 2017 15:44:36 +0100
Can anyone help me with the seemingly simple task of creating a relative NSURL for a filesystem object? The catch here (sorry!) is that I really do need backward compatibility to 10.7, which rules out fileURLWithFileSystemRepresentation:isDirectory:relativeToURL: (which I suspect is the “right” way of doing this).
My attempt like:
[NSURL URLWithString:[path stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding] relativeToURL:relativeTo];
This had been working ok for some time, but I have just found it to be broken for filenames containing unusual characters. In particular, it fails when given a filename containing a “smart quote” (not easily created directly with the keyboard, but auto-generated as part of a time machine backup, based on the machine name).
Although I do not recall why I used stringByAddingPercentEscapesUsingEncoding, I think it must have been because it failed on some other filename pattern if I did not do that.
String encodings is something I know basically nothing about, I am afraid. I am speculating that what is happening is that the fancy apostrophe is not ASCII and so my code does not work for that filename. I can change the encoding to NSUnicodeStringEncoding, and things seem ok, but I don’t know whether that will now definitely work for all filenames, or whether I have just stored up an even more obscure problem for the future.
So, finally getting to two actual questions:
1. Will unicode encoding give me a robust solution here?
2. Is there a differnet, better way (pre-10.9) I should be using to create a relative URL?
Thanks for any advice
Jonny.
_______________________________________________
Cocoa-dev mailing list (email@hidden)
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:
This email sent to email@hidden