nsarraycontroller

问题 I am having trouble getting an core-data backed NSArrayController to work properly in my code. Below is my code: pageArrayController = [[NSArrayController alloc] initWithContent:nil]; [pageArrayController setManagedObjectContext:[self managedObjectContext]]; [pageArrayController setEntityName:@"Page"]; [pageArrayController setAvoidsEmptySelection:YES]; [pageArrayController setPreservesSelection:YES]; [pageArrayController setSelectsInsertedObjects:YES]; [pageArrayController

问题 Am I misunderstanding something about bindings? I bind (an NSArrayController's content) to an NSDictionary's "allValues" array, and it thinks it's empty. I bind to a random object with a property that I've set to be that same NSDictionary's "allValues" array, and it works fine. Is this expected behavior, or am I doing something wrong? Furthermore, if this is expected, what is the standard way to deal with this? Making relatively purposeless objects just to hold arrays in properties so I can

问题 I have an NSTableView which is bound to an NSArrayController. I would like to have one of the table columns showing the index of the table row. This is easy enough to do when you implement NSTableDataSource yourself but I can't figure it out with a bound table view. I guess I'm looking here for something like the @count key path which gives me the count of arrangedObjects (that is @index) but this is obviously missing. Two clarifications: The index that is shown in each row is the index of

问题 I am making a simple mac os x app, in which I will be showing some records in a table view, after retrieving those from local db. I am using core data and NSArrayController proxy for the same and I am trying to achieve it through cocoa-bindings. Now I can easily make it working, by performing this binding in NSArrayController proxy: Proxy: NSArrayController Parameters: Managed Object Context Bind to: App Delegate Model Key Path: self.managedObjectContext but I am trying to use

问题 I have a NSTableView populated by a Core Data entity and Add Item / Remove Item buttons all wired with a NSArrayController and bindings in Interface Builder. The Undo/Redo menu items can undo or redo the add / remove item actions. But the menu entries are called only „Undo“ resp. „Redo“. How can i name them like „Undo Add Item“, „Undo Remove Item“, etc. (I am aware, something similar was asked before, but the accepted answers are either a single, now rotten link or the advice to subclass

问题 I have the following models in my application. Board , holds a NSMutableArray property lists of type List below List , holds a NSArray property cards of type Card below Card , has a NSString property name The relationship is thus Board --> to-many List --> to-many Card I have a NSCollectionView based master-detail interface, where I want to display Boards in the master and its corresponding Lists+Cards in the detail view. The master interface is fine, the elements Board are displayed nicely.

问题 This is simple I am sure, but I am still very much learning. I have an NSTableView that is connected to an array controller to display coredata objects. The table is uneditable. When a single record is selected, I have a subview set to be made visible that holds the value of the selection. I'm trying to make it so that when I press the + button connected to add: on my array controller, a new entry will be made and the focus will jump to the item description text field in the subview so that a

问题 Current Situation: Direct Binding I have an NSTableView which displays the data that comes from an NSArray of my custom objects. Desired Approach: Array Controller However, It would be "more best practise" to use an NSArrayController instead as a facade to my arbritary model object. So I duplicated the table in my application and created a new NSViewController where I bound the Table Content of the NSTableView to the NSArrayController . I added an IBOutlet for this class so I can now setup my

问题 Early warning - code sample a little long... I have a singleton NSMutableArray that can be accessed from anywhere within my application. I want to be able to reference the NSMutableArray from multiple NIB files but bind to UI elements via NSArrayController objects. Initial creation is not a problem. I can reference the singleton NSMutableArray when the NIB gets loaded and everything appears fine. However, changing the NSMutableArray by adding or removing objects does not kick off KVO to

问题 I am trying to populate a 2-column NSVTableView via bindings, but the data is not showing up in the table. In XCode: I have a NSMutableArray in my AppDelegate that will hold the data, as well as the corresponding @property and @synthesize. On an event, I call [removeAllObjects] on the NSMutableArray and repopulate it with some NSDictionary objects. Each dictionary contains 2 KVP's: a NAME and a VALUE. In IB: I added an NSArrayController and bound it's Content Array to my AppDelegate and set