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POUISliders lose target action when in UIView
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  1. POUISliders lose target action when in UIView
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    copied!<p>I am trying to create a page of UISliders. The amount of sliders is dynamic.</p> <p>I have a PageViewController class and when I put the UISliders in a subview of PageViewController the sliders work.</p> <p>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.</p> <p>This works (from PageViewController.m):</p> <pre><code>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"); } </code></pre> <p>However moving it into this class breaks it</p> <pre><code>@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 </code></pre> <p>The implementation</p> <pre><code>#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"); } </code></pre>
 

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