两个绑定表视图之一未更新其他表中的更改

American Travel <-- selected
Browse All
Fiction
Science Fiction

leftController.selection.books

Avoid Empty Selection
Preserve Selection
Select Inserted Objects
Auto Rearrange Content

Bind to : RightController
Controller Key : arranged Objects
ModelKey Path : name

/// Begin Category.h
@class Book;

@interface Category : NSManagedObject {
}
@property (nonatomic, retain) NSSet * books;
@property (nonatomic, retain) NSString * name;// name of book_category

......

I have added a button which is connected an action in the

LeftArrayController(Category) namely, selectNext: . When I click 

the button, the selection in the CATEGORY TableView does not

visibly change, but the TableView on the right (Books) does change, 

as the list of books on the Right continually changes. 

If I click the TableView with the mouse, no selection change is done 

either in effect on the RightTableView or in the visible

sense on the Left TableView. Why is the mouseClick not effecting a 

visible change int the TableViewColumn? That is, why is the mouse 

unable to change selection, whereas the button is able to. 

There is only one column in the TableView. In Attributes Inspector I have

tried all combination of Empty,Column and Type Select for this single selection

Table. Is there no way around using NSTableView Delegate methods to set selection?