Re: Update slider position
Re: Update slider position
- Subject: Re: Update slider position
- From: "Kyle Sluder" <email@hidden>
- Date: Sun, 11 May 2008 14:35:02 -0400
On Sun, May 11, 2008 at 12:50 PM, Mike <email@hidden> wrote:
> I have NSTextField which is connected to a slider in IB with its (Sent
> Actions = Take Double Value from).
Don't do this. See below.
> (Apparently I can't have them both connected to each other AND still have
> connection to my controller when either is changed?)
Nope. It doesn't make sense to have multiple things connected to one
outlet; that's why you have a controller. That said, it does make
sense for something to be connected to multiple outlets.
> Q: How do I make that reset to reflect to slider too without having another
> outlet and do it manually?
First you should review some introductory material on
model-view-controller. In your setup, this is what you would do:
1. Create a controller object that has an IBAction method. Something
like - (void)takeMyValue:(id)sender.
2. Add two outlets to your controller: an NSSlider* and an NSTextField*.
3. Wire up the target/action of both your slider and text field to
your controller object's -takeMyValue: method.
4. Wire up the NSSlider and NSTextField outlets of your controller
object to their respective views.
5. In -takeMyValue:, send both your slider and text field a
-setFloatValue: message with [sender floatValue] as the argument.
Here's an example of this pattern so you can see how it plays out:
http://cocoadevcentral.com/articles/000045.php
Or, instead of writing all this glue code, you can use bindings. Make
a KVC-compliant property in your model and bind both the slider and
text field to that keypath. No code required.
--Kyle Sluder
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