Re: Unable to set View Tag in IB?
Re: Unable to set View Tag in IB?
- Subject: Re: Unable to set View Tag in IB?
- From: Kyle Sluder <email@hidden>
- Date: Tue, 07 Apr 2015 09:34:18 -0500
On Tue, Apr 7, 2015, at 04:46 AM, Dave wrote:
>
> > On 6 Apr 2015, at 15:56, Jonathan Mitchell <email@hidden> wrote:
>
> > Tag is a readonly property for views. NSControl implements setTag:
> > If you defined a setNumberTag: method on your custom view you could use the user defined attributes in the NIB identity inspector to initialise the tag.
>
> Is there any reason why? Seems a bit nuts to not allow it on NSViews, I
> do it all the time with UIView.
Speculation: it might just be an artifact of history, like how -target
and -action are on NSActionCell instead of NSCell.
The purpose of tag was for the recipient of an action message to figure
out which member of a group of controls was actually chosen.
Conceptually, senders were going to be NSControls, so back in the day it
might have really been a big deal to save those four bytes on each
non-control NSView instance.
--Kyle Sluder
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