Ok, so I do have subscriptions, and subscriptionsArrayContoller set up as you say - I should have mentioned that. I also have the arrayController "Prepares Content" option checked in Interface Builder.
I tried all those options you provided. none worked, I still have the same result, the tableView will not update until something is changed via the UI. can the XIB become corrupted somehow? On 09/01/2010, at 10:29 PM, Quincey Morris wrote: > On Jan 9, 2010, at 00:19, Russell Gray wrote: > >> OK, so i checked out the link, and tried the following calls: >> >> [subscriptions insertObject:subscriptionInfo atIndex:[subscriptions count]]; >> >> that didn't work, so I tried the following: >> >> [subscriptionsArrayController willChangeValueForKey:@"subscriptions"]; >> [subscriptions insertObject:subscriptionInfo atIndex:[subscriptions count]]; >> [subscriptionsArrayController didChangeValueForKey:@"subscriptions"]; >> >> still, no good, so I also tried: >> >> [subscriptionsArrayController willChangeValueForKey:@"arrangedObjects"]; >> [subscriptions insertObject:subscriptionInfo atIndex:[subscriptions count]]; >> [subscriptionsArrayController didChangeValueForKey:@"arrangedObjects"]; >> >> Am I totally missing something here? > > Well, flailing, anyway. > > These code samples imply, but don't say, that 'subscriptions' is a > NSMutableArray instance variable in some data model object, and that > 'subscriptionsArrayController' is a NSArrayController whose "contentArray" is > bound to the "subscriptions" property in that data model object, which is > backed by the 'subscriptions' instance variable. (It would have been nice if > you had given us that information.) Assuming that ... > > The problem in the first case is that property "subscriptions" is not being > updated KVO-compliantly. > > The problem in the second case is that property "subscriptions" is not being > updated KVO-compliantly, and array controllers don't have a "subscriptions" > property. > > The problem in the third case is that property "subscriptions" is not being > updated KVO-compliantly, and forcing a KVO notification of the array > controller's "arrangedObjects" property doesn't help, because property > "subscriptions" is not being updated KVO-compliantly. > > Are you seeing a pattern here? > > There are two ways you can update the "subscriptions" property > KVO-compliantly: > > 1. [[self mutableArrayValueForKey: @"subscriptions"] insertObject: > subscriptionInfo atIndex: [subscriptions count]]; > > 2. [subscriptionsArrayController insertObject: subscriptionInfo > atArrangedObjectIndex: [[subscriptionsArrayController arrangedObjects] > count]]; > > These can be abbreviated to: > > 1. [[self mutableArrayValueForKey: @"subscriptions"] addObject: > subscriptionInfo]; > > 2. [subscriptionsArrayController addObject: subscriptionInfo]; > > In the first case, you add the object via a mutable array proxy that provides > KVO compliance, and the array controller will notice accordingly. In the > second case, you add the object via the array controller, and it updates your > data model property KVO compliantly for you. > > Note that you should really define a "subscriptions" property (using > @property/@synthesize), if you haven't already. However, it happens to work > without the defined property, because KVO looks for a same-named instance > variable if the property is missing. > > Does that help? > > > _______________________________________________ > > 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: > http://lists.apple.com/mailman/options/cocoa-dev/sweetpproductions%40gmail.com > > This email sent to sweetpproducti...@gmail.com _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
