无论宽度如何，调整UILabel大小以适应自定义UITableViewCell内的文本 [英] Resize UILabel to fit text inside custom UITableViewCell regardless of width

问题描述

无论设备或方向如何，我都试图让单元格中的标签尺寸合适。我能够正确地调整行高。我也可以在 cellForRowAtIndexPath 中正确设置标签高度，并可以在我的日志中检查它。但是，当它到达 willDisplayRowAtIndexPath 时，标签高度已经改变，但只有当单元格不是320点宽时。

I'm trying to get a label in a cell to be the right size, regardless of device or orientation. I am able to get the row height to size correctly. I am also able to set the label height correctly in cellForRowAtIndexPath, and can check that in my logs. But, by the time it gets to willDisplayRowAtIndexPath, the label height has changed, but only when the cell is not 320 pts wide.

这是我的代码 -

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"CustomCellIdentifier";
CustomInfoCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil){
    cell = [[CustomInfoCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier];
    NSArray *objects = [[NSBundle mainBundle] loadNibNamed:@"CustomInfoCell" owner:self options:nil];
    cell = objects[0];
}

// Configure the cell...
cell.customTitleLabel.text = [_data[indexPath.row] objectForKey:t];

CGFloat labelWidth = self.view.frame.size.width-40;
NSLog(@"labelWidth:%f",labelWidth);

NSString *text = [_data[indexPath.row] objectForKey:d];//correct text
CGSize labelsize=[text sizeWithFont:cell.customDetailLabel.font constrainedToSize:CGSizeMake(labelWidth, 2000.0) lineBreakMode:cell.customDetailLabel.lineBreakMode];
NSLog(@"labelsize:%f,%f",labelsize.width,labelsize.height);

//For testing
cell.customDetailLabel.backgroundColor = [UIColor redColor];
NSLog(@"Pre: %@",cell.customDetailLabel);
cell.customDetailLabel.frame=CGRectMake(20, 22, labelWidth, labelsize.height);

cell.customDetailLabel.text = text;
    NSLog(@"Post: %@",cell.customDetailLabel);
return cell;
}

在 willDisplayRowAtIndexPath I还会打印标签信息。这是一行打印的内容 -

In willDisplayRowAtIndexPath I also print the label info. Here's what one row prints-

2013-03-24 18:33:44.009 Bridge Alert[57793:1e503] labelWidth:728.000000
2013-03-24 18:33:44.010 Bridge Alert[57793:1e503] labelsize:713.000000,76.000000
2013-03-24 18:33:44.010 Bridge Alert[57793:1e503] Pre: <UILabel: 0xad3eaf0; frame = (20 20; 280 21); text = 'Detail'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x17372eb0>>
2013-03-24 18:33:44.011 Bridge Alert[57793:1e503] Post: <UILabel: 0xad3eaf0; frame = (20 22; 728 76); text = 'Detail'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x17372eb0>>
2013-03-24 18:33:44.011 Bridge Alert[57793:1e503] Text set: <UILabel: 0xad3eaf0; frame = (20 22; 728 76); text = 'A bridge is considered "f...'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x17372eb0>>
2013-03-24 18:33:44.014 Bridge Alert[57793:1e503] Display:<UILabel: 0xad3eaf0; frame = (20 20; 728 190); text = 'A bridge is considered "f...'; clipsToBounds = YES; opaque = NO; autoresize = RM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x17372eb0>>

正如您所见，通过Display，标签会调整大小。我假设高度是以某种方式重新计算的，基于单元格是否为320磅宽，这是内置的UITableViewCell宽度。

As you can see, by Display, the label is resized. I'm assuming the height is recalculated somehow, based on if the cell were 320 pt wide, which is the built in UITableViewCell width.

我如何获得标签大小正确？

How can I get the label to size correctly?

推荐答案

您是否尝试取消选中自动布局？这将删除不必要的（主要是无用的）约束。

Have you tried unchecking auto layout? This will remove the unnecessary (mostly unhelpful) Constraints.

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