Question

问题

我有UILabel隐藏在几层子视图中，我似乎无法更改它的文本。更新标签的代码采用MyCardSubclass的{{1}}方法。真的很奇怪的是当我记录这些标签的描述时，文本已经更新，但它不可见。这就是它的样子：

在我的View Controller的updateVisualElements方法中，我初始化了viewDidLoad和我的卡片对象。我将其UIScrollView添加为子视图，如下所示：

cardView

我的卡

-(void)viewDidLoad
{
    [super viewDidLoad];
    MyCardSubclass *myCard = [[MyCardSubclass alloc]initWithInfo:info andPoint:CGPointMake(5, runningYValue)];
    [myCard setParentViewController:self];
    [scrollView addSubview:[myCard cardView]];

    //Resize scrollView contentSize
}

我的卡片子类

//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;
}

我尝试了什么

设置文本后调用//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"); }
使用[self.totalAmountLabel setNeedsDisplay]

Answer 1

您可以尝试一件事，使用 Tag 属性来获取添加的标签并更改其竞争

示例：

UILabel totalAmountLabel = [[UILabel alloc]initWithFrame:CGRectMake(labelWidth, runningYValue, labelWidth, [totalAmountLabel setText:amount]; totalAmountLabel.tag = 100; [toReturn addSubview:totalAmountLabel];

然后在 updateVisualElements()
中
UILabel *tempTotalAmountLabel = (UILabel *)[self.view viewWithTag:100]; [tempTotalAmountLabel setText:amount];

Answer 2

修正了它！问题实际上并非我试图设置标签或绘制其视图。

我没有正确使用我的初始化程序来初始化我的内容视图。

我在子类中删除了这个覆盖

-(UIView *)cardView
{
  [self setContentView:[self contentViewFromCardInfo:self.cardInfo]];
  return [super cardView];
}

我还从我的超类中的-(UIView *)cardView方法中获取了代码，并将其放入-(UIView *)buildCardView方法并将cardView属性访问器重写为原来的内容。

-(UIView *)cardView
{
    if(!_cardView)
        _cardView = [self buildCardView];

    return _cardView;
}

感谢您的意见和评论。

UILabel没有视觉上的清爽

问题

我的卡

我的卡片子类

我尝试了什么

2 个答案: