UILabel不改变setFrame的高度 [英] UILabel doesn't change height on setFrame

问题描述

我试图根据标签中的文本大小来更改 UILabel 的高度。

我可以计算标签所需的大小，但是当我尝试设置 UILabel 框架时，它只是不会改变。

下面是我的代码。
即使我将最后一行中的size.height替换为500， UILabel 框架的大小也不会改变

- （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath
{
static NSString * simpleTableIdentifier = @ GameItemCell;
GameItemCell * cell =（GameItemCell *）[tableView dequeueReusableCellWithIdentifier：simpleTableIdentifier];

NSArray * nib = [[NSBundle mainBundle] loadNibNamed：@GameItemCellowner：self options：nil];
cell = [nib objectAtIndex：0];

GameItem * item = [_hunt.gameItems objectAtIndex：indexPath.row];


cell.itemHeaderLabel.text = [NSString stringWithFormat：@＃％d - （％d pts），indexPath.row + 1，item.itemPoints];

UILabel * textLabel = cell.itemTextLabel;

textLabel.text = item.itemText;
textLabel.lineBreakMode = NSLineBreakByWordWrapping;


CGRect frame = cell.itemTextLabel.frame;
CGSize textSize = {frame.size.width，20000.0f};
CGSize sizeOneLine = [@one linesizeWithFont：cell.itemTextLabel.font constrainedToSize：textSize lineBreakMode：NSLineBreakByWordWrapping];
CGSize cellTextSize = [item.itemText sizeWithFont：cell.itemTextLabel.font constrainedToSize：textSize lineBreakMode：NSLineBreakByWordWrapping];
CGSize sizeOneLineSpacing = CGSizeMake（sizeOneLine.width，sizeOneLine.height + 3）;
NSInteger lines = cellTextSize.height / sizeOneLine.height;
CGSize size = CGSizeMake（frame.size.width，lines * sizeOneLineSpacing.height）;

textLabel.frame = CGRectMake（frame.origin.x，frame.origin.y，size.width，size.height）;



return cell;
}


解决方案

您的标签在GameItemCell里 - （void）layoutSubviews

I'm trying to change the height of a UILabel depending on how much text is in the label.

I can calculate the size required for the label but when I try to set the UILabel frame it just doesn't change.

Below is my code. Even if I replace size.height in the last line to something like 500 the size of the UILabel frame doesn't change

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
    static NSString *simpleTableIdentifier = @"GameItemCell";
    GameItemCell *cell = (GameItemCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"GameItemCell" owner:self options:nil];
    cell = [nib objectAtIndex:0];

    GameItem* item = [_hunt.gameItems objectAtIndex: indexPath.row];


    cell.itemHeaderLabel.text = [NSString stringWithFormat:@"#%d - (%d pts)", indexPath.row+1, item.itemPoints];

    UILabel* textLabel = cell.itemTextLabel;

    textLabel.text = item.itemText;
    textLabel.lineBreakMode = NSLineBreakByWordWrapping;


    CGRect frame = cell.itemTextLabel.frame;
    CGSize textSize = { frame.size.width, 20000.0f };
    CGSize sizeOneLine = [@"one line" sizeWithFont:cell.itemTextLabel.font constrainedToSize:textSize lineBreakMode:NSLineBreakByWordWrapping];
    CGSize cellTextSize = [item.itemText sizeWithFont:cell.itemTextLabel.font constrainedToSize:textSize lineBreakMode:NSLineBreakByWordWrapping];
    CGSize sizeOneLineSpacing = CGSizeMake(sizeOneLine.width, sizeOneLine.height + 3);
    NSInteger lines = cellTextSize.height / sizeOneLine.height;
    CGSize size = CGSizeMake(frame.size.width, lines * sizeOneLineSpacing.height);

    textLabel.frame = CGRectMake(frame.origin.x, frame.origin.y, size.width, size.height);



    return cell;
}

解决方案

You must set the frame of your label in GameItemCell inside -(void)layoutSubviews

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