How to prevent the user to rummage the file extension

Scripting Forums AppleScriptObjC and Xcode
#1

Hello,

I’d like to prevent my user to enter a wrong file extension into the NSSavePanel. This is how:

NSString *thePath = [[[NSString stringWithString:[[op URL]path]]stringByDeletingPathExtension]stringByAppendingPathExtension:@“evals7”]; // normalize file name.

So, if (s)he enters “Toto” I get “Toto.evals7”, if (s)he enters “Toto.evals” I get “Toto.evals7”.

Is there a better way to do it?

#2

I don’t now a better way, but the stringWithString part isn’t necessary --[[op URL] path] returns a string.

Ric

#3

Your stringWithString: is redundant. I think it would be safer to check the extension, and if it’s wrong add the correct one. But setting allowedFileTypes and setting allowsOtherFileTypes to NO effectively does that for you.

#4

That is:
NSSavePanel *op = [NSSavePanel savePanel];
[op setAllowedFileTypes:[NSArray arrayWithObject:@“evals7”]];
[op setAllowsOtherFileTypes:NO];
[op runModal];

Yes, the difference is, for the example above, I could end with “Toto.evals.evals7”. Well, it was just to be sure, a “standard” user does not even know what an extension is.

Thanks!

#5

If you provide a name like Untitled.eval7, the Untitled part only will be selected. But there’s always setExtensionHidden: and setCanSelectHiddenExtension: if you want to be doubly-sure.