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POUILabel not visually refreshing
 

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  1. POUILabel not visually refreshing
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    <h2>The Problem</h2> <p>I have a <code>UILabel</code> buried in a few layers of subviews and I can't seem to change it's text. The code to update the label is in<code>MyCardSubclass</code>'s <code>updateVisualElements</code> method. The really weird thing is that <strong>when I log the description of these labels, the text has been updated, but it is not visible.</strong> Here's what it looks like:</p> <p>Inside my View Controller's <code>viewDidLoad</code> method I initialize a <code>UIScrollView</code> and my card object. I add its <code>cardView</code> as a subview like so:</p> <pre><code>-(void)viewDidLoad { [super viewDidLoad]; MyCardSubclass *myCard = [[MyCardSubclass alloc]initWithInfo:info andPoint:CGPointMake(5, runningYValue)]; [myCard setParentViewController:self]; [scrollView addSubview:[myCard cardView]]; //Resize scrollView contentSize } </code></pre> <h3>My Card</h3> <pre><code>//header @property (nonatomic, strong) UIView *contentView; @property (nonatomic, strong) UIView *cardView; @property (nonatomic, strong) CardInfo *cardInfo; @property (nonatomic, strong) UIViewController *parentViewController; //implementaion -(UIView *)cardView { CGRect screenRect = [[UIScreen mainScreen] bounds]; UIView *toReturn = [[UIView alloc]initWithFrame:CGRectMake(self.point.x,self.point.y, screenRect.size.width-borderOffset*2, cardViewHeight)]; UILabel *titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(borderOffset, 0, toReturn.frame.size.width-borderOffset*2, titleHeight)]; [titleLabel setText:self.title]; [toReturn addSubview:titleLabel]; [self.contentView setFrame:CGRectMake(borderOffset, titleHeight, screenRect.size.width-borderOffset, contentViewHeight)]; if(self.contentView) [toReturn addSubview:self.contentView]; else NSLog(@"no contentView"); //other view stuff return toReturn; } </code></pre> <h3>My Card Subclass</h3> <pre><code>//header @property(nonatomic, strong) UILabel *totalAmountLabel; @property(nonatomic, strong) UILabel *availableAmountLabel; @property(nonatomic, assign) double available; //implementation -(UIView *)cardView { [self setContentView:[self contentViewFromCardInfo:self.cardInfo]]; return [super cardView]; } -(UIView *)contentViewFromCardInfo:(CardInfo *)cardInfo { UIView *toReturn = [[UIView alloc]init]; NSString *amount = @"0"; self.totalAmountLabel = [[UILabel alloc]initWithFrame:CGRectMake(labelWidth, runningYValue, labelWidth, labelHeight)]; [self.totalAmountLabel setText:amount]; [toReturn addSubview:self.totalAmountLabel]; runningYValue +=self.totalAmountLabel.frame.size.height+spacer; self.availableAmountLabel = [[UILabel alloc]initWithFrame:CGRectMake(labelWidth, runningYValue, labelWidth, labelHeight)]; [self.availableAmountLabel setText:@"0"]; [toReturn addSubview:self.availableAmountLabel]; return toReturn; } -(void)updateVisualElements { NSString *amount = @"10" NSString *availableString = @100" //The log descriptions for these labels are okay. [self.totalAmountLabel setText:amount]; NSLog(@"%@",self.totalAmountLabel.debugDescription); [self.availableAmountLabel setText:availableString]; NSLog(@"%@",self.availableAmountLabel.debugDescription); NSAssert([NSThread isMainThread], @"Not on main thread"); NSAssert(self.totalAmountLabel, @"No label"); } </code></pre> <h2>What I've tried</h2> <ul> <li><p>Calling <code>[self.totalAmountLabel setNeedsDisplay]</code> after setting the text</p></li> <li><p>Calling the method on the main thread using <code>[self.totalAmountLabel performSelector:@selector(setText:) withObject:amount afterDelay:0.0]</code></p></li> </ul>
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    1. COWhere is updateVisualElements getting called from? I don't see it getting called.
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      1. USAndy Obusek
    2. COI didn't include that section, but after I receive a notification, I dismiss a modal view controller and then call updateVisualElements
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      1. USranonk
    3. COI'm just confirming, do you see the NSLog statements from updateVisualElements printing out? I'm really trying to verify that the method is definitely getting called?
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      1. USAndy Obusek
 

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