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我有两个标签，并试图在表格视图单元格上显示它们。但是第二个标签不是一个接一个地显示，而是显示在第一个标签上，而第一个标签永远不会显示...如何在第一个标签之后显示第二个标签？这是我的代码：

- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath {

UITableViewCell *cell;
UILabel *label=nil , *secondLabel = nil;

cell = [tv dequeueReusableCellWithIdentifier:@"Cell"];
if (cell == nil)
{
    cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"Cell"] autorelease];
    //cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"Cell"] autorelease];

    label = [[UILabel alloc] initWithFrame:CGRectZero]; 
    [label setLineBreakMode:UILineBreakModeWordWrap];
    [label setMinimumFontSize:FONT_SIZE];
    [label setNumberOfLines:0];
    [label setFont:[UIFont boldSystemFontOfSize:FONT_SIZE]];
    [label setTag:1];

    //[[label layer] setBorderWidth:2.0f];

    [[cell contentView] addSubview:label];

    secondLabel = [[UILabel alloc] initWithFrame:CGRectZero];
    [secondLabel setLineBreakMode:UILineBreakModeWordWrap];
    [secondLabel setMinimumFontSize:FONT_SIZE];
    [secondLabel setNumberOfLines:0];
    [secondLabel setFont:[UIFont systemFontOfSize:FONT_SIZE]];
    [secondLabel setTag:2]; 

    [[cell contentView] addSubview:secondLabel];    
}


//NSString *text = [items objectAtIndex:[indexPath row]];
int storyIndex = [indexPath indexAtPosition: [indexPath length]-1];
NSString *text1 = [[stories objectAtIndex: storyIndex] objectForKey: @"title"];  
NSString *text2 = [[stories objectAtIndex: storyIndex] objectForKey: @"summary"];

CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);

CGSize size1 = [text1 sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
CGSize size2 = [text2 sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];    

if (!label)
    label = (UILabel*)[cell viewWithTag:1];
if (!secondLabel)
    secondLabel = (UILabel*)[cell viewWithTag:2];    

//[label setText:text1];
//[secondLabel setText:text2];

label.text = text1;
secondLabel.text = text2;

//cell.textLabel.text = text1;
//cell.detailTextLabel.text = text2;

[label setFrame:CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), MAX(size1.height, 44.0f))];
[secondLabel setFrame:CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), MAX(size2.height, 44.0f))]; 

return cell;  }

和：

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];
NSString *text1 = [[stories objectAtIndex: storyIndex] objectForKey: @"title"];
NSString *text2 = [[stories objectAtIndex: storyIndex] objectForKey: @"summary"];    

CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);

CGSize size1 = [text1 sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
CGSize size2 = [text2 sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];    
CGFloat height = MAX(size1.height + size2.height, 44.0f);

return height + (CELL_CONTENT_MARGIN * 2);}
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2 回答 2

1

问题是您对两个标签使用相同的框架。使用不同的框架。

于 2012-06-04T09:55:18.103 回答
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您永远不会为两个 UILabel 设置框架。对于 label 和 secondLabel，您都在调用 initWithFrame:CGRectZero，因此在这两种情况下，它们的帧的 origin.x 和 origin.y 都是 0。

secondLabel 默认标记为不透明，这就是它完全遮盖第一个标签的原因。

为了解决这个问题，你应该在标签被添加到 UITableViewCell 后实际调用 setText:。一旦你有了标签的大小，你就可以将 secondLabel 的框架设置在它之下。

于 2012-06-03T21:43:36.063 回答