Question

我有一个UILabel作为UIButton的子视图，我正在传递该值从另一个视图填充UILabel。现在，我希望UILabel 必须根据内容改变它的高度。如果文字是＆＃34;你好＆＃34;它必须在一行，但如果文字是＆＃34;我的文字太长，不适合标签＆＃34;，它必须改变它的大小。我用过

   [self.addressLabel sizeToFit];

但是为此，我需要在UILabel下留下空白区域。简直就是我想要的是当文字强度增加时，UILabel和UIView的大小必须扩大。

Answer 1

在下方使用，您可以获得标签的高度

text - 标签文字
font - 标签中使用的字体

宽度 - 标签的宽度

-(float) getHeightForText:(NSString*) text withFont:(UIFont*) font andWidth:(float) width{
    CGSize constraint = CGSizeMake(width , 20000.0f);
    CGSize title_size;
    float totalHeight;

    SEL selector = @selector(boundingRectWithSize:options:attributes:context:);
    if ([text respondsToSelector:selector]) {                
        title_size = [text boundingRectWithSize:constraint
                                        options:NSStringDrawingUsesLineFragmentOrigin
                                     attributes:@{ NSFontAttributeName : font }
                                        context:nil].size;

        totalHeight = ceil(title_size.height); 
    } else {                
        title_size = [text sizeWithFont:font
                      constrainedToSize:constraint
                          lineBreakMode:NSLineBreakByWordWrapping];                
        totalHeight = title_size.height ;                
    }

    CGFloat height = MAX(totalHeight, 40.0f);
    return height;            
}

并使用高度

创建一个框架

CGRect frame = questionTitleLbl.frame;

float height = [self getHeightForText:questionTitleLbl.text 
                             withFont:questionTitleLbl.font
                            andWidth:questionTitleLbl.frame.size.width];
float gap = 2;

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

Answer 2

以下是处理此问题的方法：

UILabel *sight = (UILabel *)[cell viewWithTag:100];
sight.text=tmpGroup.title;

sight.frame =CGRectMake(sight.frame.origin.x, sight.frame.origin.y, 191, 21);


sight.font = [UIFont fontWithName:@"RobotoSlab-Bold" size:10];


sight.numberOfLines=0;
sight.lineBreakMode=NSLineBreakByWordWrapping;

[sight sizeToFit];

Answer 3

使用此代码非常简单并使用ios8更新

将此方法添加到appconstant文件

inline static CGSize getLabelHeightForFont(NSString *fontName,NSString* str, float fontSize, float lblWidth)
{
    NSString *text = str;
    CGFloat width = lblWidth;
    UIFont *font = [UIFont fontWithName:fontName size:fontSize];

    NSAttributedString *attributedText =
    [[NSAttributedString alloc]
     initWithString:text
     attributes:@
     {
     NSFontAttributeName: font
     }];
    CGRect rect = [attributedText boundingRectWithSize:(CGSize){width, CGFLOAT_MAX}
                                               options:NSStringDrawingUsesLineFragmentOrigin
                                               context:nil];
    return rect.size;


}

最后使用此代码进行动态创建UILabel

CGFloat lbl_height = getLabelHeightForFont(@"System- System", address, 15, lbl_address.frame.size.width);
    lbl_address.numberOfLines = 0;
    lbl_address.textAlignment = NSTextAlignmentLeft;
    [lbl_address setLineBreakMode:NSLineBreakByWordWrapping];
    lbl_address.frame = CGRectMake(lbl_address.frame.origin.x, lbl_address.frame.origin.y, lbl_address.frame.size.width, lbl_height+5);

Answer 4

这是获取标签动态高度的最简单功能。你可以使用这个功能这里ceil是预定义函数，用于返回最小的整数值。而MAXHEIGHT是uilabel的最大高度，例如你可以为未来的caluclations提供1000 ......

-(CGFloat) getHeightForLabels : (UILabel *) label
    {

        CGSize widthMaxHeight = CGSizeMake(label.frame.size.width, MAXHEIGHT);
        CGSize size;

        NSStringDrawingContext *context = [[NSStringDrawingContext alloc] init];
        CGSize boundingRect = [label.text boundingRectWithSize:widthMaxHeight
                                                      options:NSStringDrawingUsesLineFragmentOrigin
                                                   attributes:@{NSFontAttributeName:label.font}
                                                      context:context].size;

        size = CGSizeMake(ceil(boundingRect.width), ceil(boundingRect.height));

        return size.height;
    }

根据内容动态更改UILabel的高度

4 个答案: