ios - UILabel 自动高度根据长度 ios

Question

我有一个如下所示的 UICollectionView。如您所见，titleLabel 应根据内容改变其高度。背景 View labelView 也应改变其高度。我该怎么做？

我用过...

-(CGFloat) heightForText:(NSString *)text withWidth:(CGFloat) textWidth{

    CGSize constraint = CGSizeMake(textWidth, 20000.0f);
    CGRect rect = [text boundingRectWithSize:constraint
                       options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
                    attributes:@{NSFontAttributeName:cell.titleLabel.font}
                       context:nil];
    CGFloat height = rect.size.height;

    height = ceilf(height);
//    NSLog(@"height %f", height);
    return height;
}

我用这个就像...

CGRect newFrame = cell.titleLabel.frame;
      newFrame.size.height = height;
       cell.titleLabel.frame = newFrame;

我正在为标签获取新框架。但是高度从固定的 y 向下增加。现在我必须根据高度提升 y。还有其他方法吗？

Answer 1

方法在这里

-(CGFloat) heightForText:(NSString *)text withWidth:(CGFloat) textWidth{

    CGSize constraint = CGSizeMake(textWidth, 20000.0f);
    CGRect rect = [text boundingRectWithSize:constraint
                       options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
                    attributes:@{NSFontAttributeName:cell.titleLabel.font}
                       context:nil];
    CGFloat height = rect.size.height;

    height = ceilf(height);
//    NSLog(@"height %f", height);
    return height;
}