Question

At runtime, I am creating a NSSlider inside an NSMenu. I would like a message to be sent to a target object, but that message also requires a float argument.

So far, I have managed to do this by keeping a pointer on the NSSlider:

NSSlider * widthSlider = [[NSSlider alloc] 
                           initWithFrame:NSMakeRect(16, 0, 150, 32)];
[widthSlider setMinValue:0.1];
[widthSlider setMaxValue:10];
[widthSlider setTarget:self];
 widthSliderRef=widthSlider;
[widthSlider setAction:@selector(updateLW:)];
[...]
-(void) updateLW:(id)sender {
[self setLW:[widthSliderRef doubleValue]]; }

Now I would like to get rid of the widthSliderRef.

I would like the NSSlider to send setLW: to self with its doublevalue as argument.

How can it be done ?

Answer 1

The sender argument to updateLW: should be the slider — you can just send doubleValue to that.