UILabel动态宽度计算多行

Question

我有UILabel我有2行文字。我使用以下代码计算动态宽度和高度

CGSize expectedLabelSize = [[aLabel text] sizeWithFont:aLabel.font
                                         constrainedToSize:aLabel.frame.size
                                             lineBreakMode:aLabel.lineBreakMode];

 CGRect rect =  [aLabel frame];
    rect.size.width = expectedLabelSize.width;
    [aLabel setFrame:rect];

现在，如果UILabel中有多行，我该如何检测宽度。查看图像以获得更多清晰度。

Answer 1

为Label

设置属性

label.numberOfLines = 0;

CGFloat labelHeight=  [self heightOfLabelWithIngredientLine:pixers.name];

[label setFrame:CGRectMake(10,10,100,labelHeight)];

- (CGFloat)heightOfLabelWithIngredientLine:(NSString *)stringLabel
{

    CGRect frame;
    NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys: [UIFont fontWithName:@"Helvetica" size:14.0f], NSFontAttributeName, nil];
    frame = [stringLabel boundingRectWithSize:CGSizeMake(20.0f, 999.0f) options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading) attributes:attributesDictionary context:nil];
    return frame.size.height;
}

在

中自定义标签属性

- (CGFloat)heightOfLabelWithIngredientLine:(NSString *)stringLabel

方法