自定义UITableView单元格中的UILabels重叠

Question

我在自定义单元格中遇到标签重叠的问题。以下是此单元格的初始化和布局方法：

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self)
    {
        self.img = [[[UIImageView alloc] init] autorelease];
        [self.contentView addSubview:self.img];
        self.p = [[[UILabel alloc] init] autorelease];
        [self.p setTextAlignment:UITextAlignmentCenter];
        [self.p setFont:[UIFont fontWithName:@"Helvetica" size:10.0]];
        [self.p setLineBreakMode:UILineBreakModeTailTruncation];
        [self.p setNumberOfLines:1];
        [self.p setTextColor:[UIColor whiteColor]];
        [self.p setBackgroundColor:[UIColor redColor]];
        [self.p setText:@"PREMIERA"];
        [self.contentView addSubview:self.p];        
        self.g = [[[UILabel alloc] init] autorelease];
        [self.g setTextAlignment:UITextAlignmentLeft];
        [self.g setFont:[UIFont fontWithName:@"Helvetica-Bold" size:12.0]];
        [self.g setLineBreakMode:UILineBreakModeTailTruncation];
        [self.g setNumberOfLines:1];
        [self.contentView addSubview:self.g];
        self.t = [[[UILabel alloc] init] autorelease];
        [self.t setTextAlignment:UITextAlignmentLeft];
        [self.t setFont:[UIFont fontWithName:@"Helvetica-Bold" size:14.0]];
        [self.t setMinimumFontSize:12.0f];
        [self.t setAdjustsFontSizeToFitWidth:YES];
        [self.t setLineBreakMode:UILineBreakModeTailTruncation];
        [self.t setNumberOfLines:1];
        [self.contentView addSubview:self.t];
        self.o = [[[UILabel alloc] init] autorelease];
        [self.o setTextAlignment:UITextAlignmentLeft];
        [self.o setFont:[UIFont fontWithName:@"Helvetica" size:12.0]];
        [self.o setLineBreakMode:UILineBreakModeTailTruncation];
        [self.o setNumberOfLines:1];
        [self.contentView addSubview:self.o];
    }
    return self;
}
- (void)layoutSubviews
{
    [super layoutSubviews];
    self.img.frame = CGRectMake(0, 0, 40, 60);
    self.p.frame = CGRectMake(0, 0, 0, 0);
    self.g.frame = CGRectMake(0, 0, 0, 0);
    self.t.frame = CGRectMake(0, 0, 0, 0);
    self.o.frame = CGRectMake(0, 0, 0, 0);
    CGSize pSize = CGSizeMake(0, 0);
    CGSize gSize = CGSizeMake(0, 0);
    CGSize tSize = [self.t.text sizeWithFont:self.t.font constrainedToSize:CGSizeMake(230, 16) lineBreakMode:self.t.lineBreakMode]; 
    CGSize oSize = [self.o.text sizeWithFont:self.o.font constrainedToSize:CGSizeMake(230, 16) lineBreakMode:self.o.lineBreakMode];

    if (self.jestPremiera)
    {
        pSize = [self.p.text sizeWithFont:self.p.font constrainedToSize:CGSizeMake(60, 16) lineBreakMode:self.p.lineBreakMode];    
        gSize = [self.g.text sizeWithFont:self.g.font constrainedToSize:CGSizeMake(175, 16) lineBreakMode:self.g.lineBreakMode];
        self.p.frame = CGRectMake(50, 5, 60, pSize.height);
        self.p.hidden = NO;
        self.g.frame = CGRectMake(115, 5, 175, gSize.height);
    }
    else
    {
        gSize = [self.g.text sizeWithFont:self.g.font constrainedToSize:CGSizeMake(230, 16) lineBreakMode:self.g.lineBreakMode];            
        self.p.hidden = YES;
        self.g.frame = CGRectMake(50, 5, 230, gSize.height);
    }
    self.t.frame = CGRectMake(50, 5 + gSize.height, 230, tSize.height);
    self.o.frame = CGRectMake(50, 5 + gSize.height + tSize.height, 230, oSize.height);            
}

通常这是有效的，但有时（仅在3G设备上）它看起来像：http://imageshack.us/f/17/tvkino1.jpg/

有人能告诉我这种行为的原因是什么吗？我该怎么办？

Answer 1

请尝试使用NSLog（）调试这些标签的框架进行检查；

Answer 2

我认为最好的解决方案是，如果您在分配这些标签时使用标记号定义每个标签。现在，当你需要这些标签时，只需像这样查看这些标签。。。

   yourlabelname = (UILabel *)[cell.contentView viewWithTag:yourLabelTagNumber];

并且在您的-(void)viewDidAppear中只需重新加载表视图；