6

我有一个 iOS 应用程序，UICollectionView它水平显示单元格。在每个单元格中，我添加了一个简单的标签（现在）。这些标签显示名称，有时名称很短，这很好......但是....有时名称很长，因此被切断，因为它们不能正确地适合集合视图单元格的宽度。

有没有办法动态调整单元格/标签的宽度，以便正确显示名称文本？

我正在尝试使用这种方法：

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    return CGSizeMake(106.f, 60.f);
}

但是我对上述方法有两个主要问题：

  1. 如何从此方法访问单元格标签？（这样我就可以得到它的高度）。
  2. 我如何实际确定单元格/标签的宽度需要是多少？

谢谢你的时间，

担

4

4 回答 4

0

您无法访问标签，但可以访问用于填充它的数据。有了它，您可以获得标签的高度和宽度：

CGRect labelRect = [text
                boundingRectWithSize:CGSizeMake(MAX WIDTH OF YOUR LABEL, CGFLOAT_MAX)
                options:NSStringDrawingUsesLineFragmentOrigin
                attributes:@{
                 NSFontAttributeName : [FONT OF YOUR LABEL]
                }
                context:nil];
于 2015-10-05T10:31:51.923 回答
0

我做了同样的事情TableView- 希望你可以使用这个逻辑collectionView

celllabelWidth - width of the Cell, you can get it from cellForItemAtIndexPath
celllabelWidth = cell.lblEvent.frame.size.width;

- (CGFloat)findHeightForText:(NSString *)text havingWidth:(CGFloat)widthValue andFont:(UIFont *)font {
        CGSize size = CGSizeZero;
        if (text) {
            //iOS 7
            CGRect frame = [text boundingRectWithSize:CGSizeMake(widthValue, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{ NSFontAttributeName:font } context:nil];
            size = CGSizeMake(frame.size.width, frame.size.height);
        }
        return size.height;
    }

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    CGFloat heightOfRow = 86.0;
    NSString *yourBlog = [[self.arrevents objectAtIndex:indexPath.row ] valueForKey:@"info"];
    heightOfBlog = [self findHeightForText:yourBlog havingWidth:celllabelWidth andFont:[UIFont fontWithName:@"HelveticaNeue" size:14.0]];
    heightOfRow += heightOfBlog + 10;
(long)indexPath.row,heightOfRow);
    return heightOfRow;
}

希望最好的 ：）

于 2015-10-05T10:40:58.023 回答
0

感谢大家发帖，最后对我有用的解决方案是你所有的解决方案和一些额外的“修补”的混合：

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {

    // Get the user name and profile name strings.
    NSString *user_label = [NSString stringWithFormat:@"%@", [user_data[indexPath.row] objectAtIndex:0]];
    NSString *name_label = [NSString stringWithFormat:@"%@", [user_data[indexPath.row] objectAtIndex:1]];

    // Calculate the contact text widths.
    NSDictionary *attributes = @{NSFontAttributeName:[UIFont fontWithName:@"SFUIDisplay-Thin" size:20.0f]};
    CGRect rect = [user_label boundingRectWithSize:CGSizeMake(MAXFLOAT, 60) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];
    CGRect rect_two = [name_label boundingRectWithSize:CGSizeMake(MAXFLOAT, 60) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];

    // Add the other cell objects width to
    // the biggest calculated text width.
    CGFloat row_width = 0;

    if (rect.size.width > rect_two.size.width) {
        row_width = (rect.size.width + 55);
    }

    else {
        row_width = (rect_two.size.width + 55);
    }

    // Only return the generated width if
    // it is bigger than the original width.

    if (row_width > 106) {
        return CGSizeMake(row_width, 60.f);
    }

    else {
        return CGSizeMake(106, 60.f);
    }
}
于 2016-07-27T10:42:04.590 回答
0

我在集合视图中使用以下代码做了同样的事情：

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {

    CGSize size1 = CGSizeMake(MAX_WIDTH_OF_STRING, [self height:YOUR_STRING];
    return size1;
}

-(float)height :(NSString*)string
    {
        UIFont *newFont = [[Util sharedUtil] fontOfType:FONT_HELVETICA_LT bold:NO size:INTERFACE_IS_PHONE?12:FONT_SIZE_LARGE_CELL];

        NSDictionary *arialdict = [NSDictionary dictionaryWithObject:newFont forKey:NSFontAttributeName];

        NSMutableAttributedString *message = [[NSMutableAttributedString alloc] initWithString:string attributes:arialdict];

        NSAttributedString *attributedText = message;
        CGRect rect = [attributedText boundingRectWithSize:(CGSize)     
                       {INTERFACE_IS_PHONE?135:220, MAXFLOAT}
                       options:NSStringDrawingUsesLineFragmentOrigin
                        context:nil];
            //you need to specify the some width, height will be calculated
            CGSize requiredSize = rect.size;
        return MAX(requiredSize.height,INTERFACE_IS_PHONE?20:30);
    }

希望对您有所帮助。

于 2015-10-05T11:05:24.850 回答