On Feb 06, 2017, at 10:30 AM, Keary Suska <[email protected]> wrote:
Warning: the following explanation assumes a scenario that you don’t explicitly describe, namely that you are editing an array-type defaults value. This is a known “issue”, if you want to call it that. As I understand it, the problem is that NSUserDefaultsController cannot "deep-observe” array-type defaults. I.e., it can watch the array itself for changes but not individual array elements because there is no clear key path to a specific array element. That is why you see changes when you alter the array itself (by adding/removing array elements), but not changes to the values of individual array elements. So, this is a limitation to the implementation of KVC/KVO, rather than any specific issue with NSUserDefaultsController. The only way to handle this situation, IMHO, is to have some intermediary or user-driven event (like a “commit” button) that “tricks” the defaults controller into thinking the entire array has changed when you need to it see changes to individual elements. I don't think that's the issue. We have other tables that are able to change existing values within arrays in prefs, although they are cell based instead of view based. To aid debugging, I've connected an action method to the NSTextField used in the NSTableCellView to be called when editing is ended. If I log the pref at that time, it's still the old value. So the field editor is not even writing the new value to the prefs. The only way I've been able to make this work is by handling controlTextDidEndEditing: in the table's delegate and manually setting the value in prefs, even though the value is coming from the arrayController.content, which is what's bound to the pref in the first place. Sent from iCloud's ridiculous UI, so, sorry about the formatting _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
