On Oct 8, 2014, at 8:59 PM, Charles Jenkins <cejw...@gmail.com> wrote:
> Now I try to bind the table. I select the Table View object and bind Table > Content to the array controller’s arrangedObjects myView key path. Then I > bind its Row Height to the array controller’s arrangedObjects myHeight key > path. > > The next time I run the program, no document ever appears. Initialization > happens normally, but before the window opens, an error is logged: > [__NSArrayI doubleValue]: unrecognized selector sent to instance <address>. > What if anything am I doing wrong when I try to bind the row height? Adding > that one thing causes the error and interrupts the NIB from loading. The table view's rowHeight binding is not a per-row row height. It's a single number for the height of all rows of the table. Using KVC to get the value from the array controller with the key path "arrangedObjects.myHeight" returns an array. -valueForKey: applied to an array will always produce an array, and -valueForKeyPath: is just a series of -valueForKey: calls. Then, the table view calls -doubleValue on whatever object KVC obtained. Hence the error that an array class doesn't respond to -doubleValue. If you want separate row heights for each row, you need to implement a table view delegate and the method -tableView:heightOfRow:. You would look up the object for the row by indexing into the array controller's arrangedObjects and obtain the height from your myHeight property. If/when you change the height of a subdocument, you need to inform the table view by calling -noteHeightOfRowsWithIndexesChanged: on it. Regards, Ken _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
