UISliders lose target action when in UIView - iphone

Question

I am trying to create a page of UISliders. The amount of sliders is dynamic.
I have a PageViewController class and when I put the UISliders in a subview of PageViewController the sliders work.
I would like to encapsulate the sliders into a UIView subclass so I can save their state/change coupled labels, etc. However when I do it the sliders stop working. I've tried a few things and am at the point to where I think I may just be missing a fundamental understanding that hopefully someone can point out.
This works (from PageViewController.m):
if ([[controlData type] isEqualToString:#"SliderInt"])
{
NSDictionary *data = controlData.data;
NSLog(#"build SliderInt %# %# %#", [controlData.data objectForKey:#"min"], [controlData.data objectForKey:#"max"], [controlData.data objectForKey:#"value"]);
CGRect frame = CGRectMake(startX, startY, 200.0, 22.00);
UISlider *slider = [[UISlider alloc] initWithFrame:frame];
[slider addTarget:self action:#selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
slider.minimumValue = 0.0;
slider.maximumValue = 50.0;
slider.continuous = YES;
slider.value = 25.0;
CGRect labelFrame = CGRectMake(startX, startY+22.0, 100.0, 30.0);
UILabel *minLabel = [[UILabel alloc] initWithFrame:labelFrame];
[minLabel setFont:[UIFont systemFontOfSize:12]];
minLabel.textAlignment = UITextAlignmentLeft;
[minLabel setText:#"minLabel:"];
labelFrame = CGRectMake(startX+200.0, startY+22.0, 100.0, 30.0);
UILabel *maxLabel = [[UILabel alloc] initWithFrame:labelFrame];
[maxLabel setFont:[UIFont systemFontOfSize:12]];
maxLabel.textAlignment = UITextAlignmentLeft;
[maxLabel setText:#"maxLabel:"];
labelFrame = CGRectMake(startX+220.0, startY+0.0, 100.0, 30.0);
UILabel *valueLabel = [[UILabel alloc] initWithFrame:labelFrame];
[valueLabel setFont:[UIFont systemFontOfSize:12]];
valueLabel.textAlignment = UITextAlignmentLeft;
[valueLabel setText:#"valueLabel:"];
minLabel.text = [data objectForKey:#"min"];
maxLabel.text = [data objectForKey:#"max"];
valueLabel.text = [data objectForKey:#"value"];
slider.minimumValue = [[data objectForKey:#"min"] intValue];
slider.maximumValue = [[data objectForKey:#"max"] intValue];
slider.value = [[data objectForKey:#"value"] intValue];
//
[contentView addSubview:slider];
[contentView addSubview:minLabel];
[contentView addSubview:maxLabel];
[contentView addSubview:valueLabel];
[slider release];
[minLabel release];
[maxLabel release];
[valueLabel release];
startY+=60;
}
if ([[controlData type] isEqualToString:#"SliderFloat"])
{
NSLog(#"build SliderFloat");
}
However moving it into this class breaks it
#interface SliderIntView : UIView {
UILabel *minLabel;
UILabel *maxLabel;
UILabel *valueLabel;
UISlider *slider;
NSDictionary *data;
}
#property(nonatomic, retain) UISlider *slider;
#property(nonatomic, retain) UILabel *minLabel;
#property(nonatomic, retain) UILabel *maxLabel;
#property(nonatomic, retain) UILabel *valueLabel;
#property(nonatomic, retain) NSDictionary *data;
- (id)initWithFrame:(CGRect)frame withData:(NSDictionary *)controlData;
-(void) sliderAction:(id) sender;
#end
The implementation
#import "SliderIntView.h"
#implementation SliderIntView
#synthesize slider, minLabel, maxLabel, valueLabel, data;
- (id)initWithFrame:(CGRect)frame withData:(NSDictionary *) controlData {
self = [super initWithFrame:frame];
if (self) {
self.data = controlData;
float startX = frame.origin.x;
float startY = frame.origin.y;
slider = [[UISlider alloc] initWithFrame:frame];
[slider addTarget:self action:#selector(sliderAction:) forControlEvents:UIControlEventTouchUpInside];
CGRect labelFrame = CGRectMake(startX, startY+22.0, 100.0, 30.0);
minLabel = [[UILabel alloc] initWithFrame:labelFrame];
[minLabel setFont:[UIFont systemFontOfSize:12]];
minLabel.textAlignment = UITextAlignmentLeft;
[minLabel setText:#"minLabel:"];
labelFrame = CGRectMake(startX+200.0, startY+22.0, 100.0, 30.0);
maxLabel = [[UILabel alloc] initWithFrame:labelFrame];
[maxLabel setFont:[UIFont systemFontOfSize:12]];
maxLabel.textAlignment = UITextAlignmentLeft;
[maxLabel setText:#"maxLabel:"];
labelFrame = CGRectMake(startX+220.0, startY+0.0, 100.0, 30.0);
valueLabel = [[UILabel alloc] initWithFrame:labelFrame];
[valueLabel setFont:[UIFont systemFontOfSize:12]];
valueLabel.textAlignment = UITextAlignmentLeft;
[valueLabel setText:#"valueLabel:"];
minLabel.text = [data objectForKey:#"min"];
maxLabel.text = [data objectForKey:#"max"];
valueLabel.text = [data objectForKey:#"value"];
slider.minimumValue = [[data objectForKey:#"min"] intValue];
slider.maximumValue = [[data objectForKey:#"max"] intValue];
slider.value = [[data objectForKey:#"value"] intValue];
[self addSubview:slider];
//[self addSubview:maxLabel];
//[self addSubview:minLabel];
//[self addSubview:valueLabel];
}
return self;
}
-(void) sliderAction:(id) sender
{
NSLog("#never happens");
}

Answer 1

The frame was the offending code. I just needed to start the slider with it's own frame as opposed to using the one passed in.
float startX = frame.origin.x;
float startY = frame.origin.y;
slider = [[UISlider alloc] initWithFrame:frame];
needs to be
slider = [[UISlider alloc] initWithFrame:CGRectMake(0.0, 0.0, 250, 22.0)];

Answer 2

Did you set userInteractionEnabled to YES for your new subclass? Is your view sure to cover the whole area your sliders take up?