Re: Binding a dictionary to a table view
Re: Binding a dictionary to a table view
- Subject: Re: Binding a dictionary to a table view
- From: Scott Ellsworth <email@hidden>
- Date: Mon, 31 Oct 2005 13:11:31 -0800
On Oct 31, 2005, at 1:06 PM, John C. Randolph wrote:
On Oct 31, 2005, at 10:20 AM, Scott Ellsworth wrote:
On Oct 31, 2005, at 4:43 AM, John C. Randolph wrote:
On Oct 30, 2005, at 10:28 AM, Stefan Fisk wrote:
I've considered making a value transformer, but It seems a bit
dodgy.
That's exactly how to do it. You'll need to transform the
dictionary into an array of objects that represent key-value
pairs. Bill Bumgarner showed me how to go about this some time
ago. He implemented a value transformer and a KeyValuePair class
which had keys for "key" and "value". -transformedValue:
returned an array of these KeyValuePair objects.
What did you do about ordering?
Nothing.
I had thought that the order of keys in a dictionary was
arbitrary, and thus could change as objects were added/deleted.
That's correct.
Don't mean to be obtuse, but would that not be a real problem for a
table view? Put another way, did you not allow object addition/
deletion, or did you somehow refresh the entire view if an item was
added/deleted?
I am asking questions because this seems to fit a situation I am in.
I have a set of object that absolutely must be in a dictionary so
lookups for display are fast, but that are also displayed as an array
in a tableview. A value transformer sounds like a good way to go
from two structures to one, but I do not want it to suddenly bite me
in the future if someone adds an item.
Scott
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