bind tableview to arraycontroller
bind tableview to arraycontroller
- Subject: bind tableview to arraycontroller
- From: Hans van der Meer <email@hidden>
- Date: Sat, 23 Feb 2008 22:02:00 +0100
Step by step I try to master the kvc-kvo-bindings matter.
Now I have:
NSArrayController bound to an NSArray in a class in my program
NSTableView bound to the NSArrayController as follows:
columns of the table are bound to fields in the objects held by
the array.
The problem I am wrestling with: how to see the tableview reacting to
changes in the array.
After the discussions in this group I refrained from explicitely
invoking kvo on the array in my class. It turns out the
NSArrayController does get the changes, even if these are not at once
visible in the tableview.
But if I touch the column header in the tableview then all of a sudden
the contents becomes visible. If in IB I select off for the 'enabled'
state in the 'control' part of the table view attributes, then the
visual updating does not occur.
One further point to note: clicking in the first column did not update
the view, though I cannot see a difference in binding with the other
columns!
My conclusion therefore: obviously am I doing something wrong in the
interaction between the tableview and the arraycontroller. The
controller apparently has received new content but not signalled that
to the tableview; the latter changing when prodded into action by the
click in the column header.
Someone who knows what exactly is going on? I have read the XCode
documentation in the "Cocoa Binding Programming Topics" but could not
solve it from that text.
Hans van der Meer
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