ios - Label在UITableViewCell中无法显示

Question

我自己写了一个继承自UILabel的类

#import "RelatedLabel.h"

@implementation RelatedLabel

- (void)didMoveToSuperview {
    [super didMoveToSuperview];
    
    self.numberOfLines = 1;
    self.font = [UIFont systemFontOfSize:12];
    self.textColor = [UIColor colorWithWhite:0 alpha:0.54];
    self.textAlignment = NSTextAlignmentLeft;
    self.translatesAutoresizingMaskIntoConstraints = NO;
}

@end

然后添加到tableviewcell中

#import <UIKit/UIKit.h>
#import "RelatedLabel.h"

@interface HomePageTableViewCell : UITableViewCell

@property (nonatomic, strong) RelatedLabel *categoryLabel;

@end


#import "HomePageTableViewCell.h"

@implementation HomePageTableViewCell

- (void)awakeFromNib {
    [super awakeFromNib];
    
    _categoryLabel.text = @"category...";
    [_categoryLabel sizeToFit];
    [_categoryLabel setFrame:CGRectMake(16, 8, 100, 44)];
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end

但是这个label无法显示出来

Answer 1

文字颜色是白色的，是不是有可能显示出来了看不到呢…… view debug 看一看，颜色改成红色看一看

Answer 2

设置背景颜色 看看view的层级是否加了上去

Answer 3

1. awakeFromNib 这个函数你加载了吗，你通过nib方式创建了cell吗？

2. 对象没创建加载啥，还没添加父视图，过于基础的问题了，楼主好好看看书吧。

Answer 4

_categoryLabel = [[UILabel alloc] init];
_categoryLabel.text = @"category...";
[_categoryLabel sizeToFit];
[_categoryLabel setFrame:CGRectMake(16, 8, 100, 44)];
[self.contentView addSubview:_categoryLabel];