iOS NSAttributedString ,NSMutableAttributedString，NSMutableParagraphStyle的使用，UILabel设置行间距和字间距并计算高度

//给UILabel设置行间距和字间距
-(void)setLabelSpace:(UILabel*)label withValue:(NSString*)str withFont:(UIFont*)font {
    NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStyle alloc] init];
    paraStyle.lineBreakMode = NSLineBreakByCharWrapping;
    paraStyle.alignment = NSTextAlignmentLeft;
    paraStyle.lineSpacing = UILABEL_LINE_SPACE; //设置行间距
    paraStyle.hyphenationFactor = 1.0;
    paraStyle.firstLineHeadIndent = 0.0;
    paraStyle.paragraphSpacingBefore = 0.0;
    paraStyle.headIndent = 0;
    paraStyle.tailIndent = 0;
    //设置字间距 NSKernAttributeName:@1.5f
    NSDictionary *dic = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:paraStyle, NSKernAttributeName:@1.5f
};
    
    NSAttributedString *attributeStr = [[NSAttributedString alloc] initWithString:str attributes:dic];
    label.attributedText = attributeStr;
}

//计算UILabel的高度(带有行间距的情况)
-(CGFloat)getSpaceLabelHeight:(NSString*)str withFont:(UIFont*)font withWidth:(CGFloat)width {
    NSMutableParagraphStyle *paraStyle = [[NSMutableParagraphStyle alloc] init];
    paraStyle.lineBreakMode = NSLineBreakByCharWrapping;
    paraStyle.alignment = NSTextAlignmentLeft;
    paraStyle.lineSpacing = UILABEL_LINE_SPACE;
    paraStyle.hyphenationFactor = 1.0;
    paraStyle.firstLineHeadIndent = 0.0;
    paraStyle.paragraphSpacingBefore = 0.0;
    paraStyle.headIndent = 0;
    paraStyle.tailIndent = 0;
    NSDictionary *dic = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:paraStyle, NSKernAttributeName:@1.5f
};
    
    CGSize size = [str boundingRectWithSize:CGSizeMake(width, HEIGHT) options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil].size;
    return size.height;
}

1、NSAttributedString 不可变属性字符串，创建出来之后不能修改其属性（属性都是只读的），但是可以在创建的时候直接附加属性设置（属性是针对所有文本），其属性介绍以及用法，直接在代码上标注如下：

 

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 100, CGRectGetWidth(self.view.frame), 300)];    label.numberOfLines = 0;  
 [self.view addSubview:label];   
 label.backgroundColor = [UIColor lightGrayColor];       
 NSString *string = @"今日头条是一款基于数据挖掘的推荐引擎产品，它为用户推荐有价值的、个性化的信息，提供连接人与信息的新型服务，是国内移动互联网领域成长最快的产品服务之一。";   
     NSMutableDictionary *dict = [NSMutableDictionary dictionary];   
 dict[NSForegroundColorAttributeName] = [UIColor redColor]; // UIColor，文本前景颜色，默认是blackColor    dict[NSBackgroundColorAttributeName] = [UIColor yellowColor];// UIColor，文本背景颜色（不是控件View的背景颜色），默认nil    dict[NSFontAttributeName] = [UIFont systemFontOfSize:20];// UIFont，文本字体大小，默认 Helvetica(Neue) 12  
    /*  文本段落样式(详细段落样式见下方)     //    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];     //    paragraphStyle.lineSpacing = 10;                  // 段落行距     */   
     dict[NSParagraphStyleAttributeName] = paragraphStyle;    // NSParagraphStyle，文本段落样式    
/*//删除线和下划线
枚举常量 NSUnderlineStyle中的值    NSUnderlineStyleNone        //不设置删除线    NSUnderlineStyleSingle      // 设置删除线为细单实线    NSUnderlineStyleThick       //   设置删除线为粗单实线    NSUnderlineStyleDouble    // 设置删除线为细双实线     NSUnderlinePatternSolid        NSUnderlinePatternDot     //点    NSUnderlinePatternDash  //虚线    NSUnderlinePatternDashDot  //虚线和点    NSUnderlinePatternDashDotDot  //虚线和点点    NSUnderlineByWord 
*/    dict[NSStrikethroughStyleAttributeName] = @(NSUnderlinePatternSolid | NSUnderlineStyleSingle);      // NSNumber，加删除线，默认不加删除线，其它的话是加不同风格的删除线    dict[NSStrikethroughColorAttributeName] = [UIColor yellowColor];          // UIColor,删除线颜色，默认等于文本前景颜色,前提是需要加删除线，和NSStrikethroughStyleAttributeName有关    dict[NSUnderlineStyleAttributeName] = @(NSUnderlineStyleDouble);          // NSNumber，加下划线，默认NSUnderlineStyleNone不加下划线，其它的话是加不同的下划线    dict[NSUnderlineColorAttributeName] = [UIColor yellowColor];              // UIColor,下划线颜色，默认等于文本前景颜色,前提是需要加下划线，和NSUnderlineStyleAttributeName有关
    dict[NSStrokeColorAttributeName] = [UIColor yellowColor];                 // UIColor,默认等于文本前景颜色，需要和NSStrokeWidthAttributeName一起使用    dict[NSStrokeWidthAttributeName] = @5;                                    // NSNumber,使文本有一种中空的效果（有立体效果）数字越大，文本填充的越满，数字越小，文本颜色越淡，不需要和NSStrokeColorAttributeName一起使用        /* 文本阴影     NSShadow *shadow = [[NSShadow alloc] init];     shadow.shadowOffset = CGSizeMake(2, 3);      阴影偏移量     shadow.shadowColor = [UIColor yellowColor];  阴影颜色     shadow.shadowBlurRadius = 1.0;               阴影圆角     */    dict[NSShadowAttributeName] = shadow;  // NSShadow,默认没有阴影，    
    dict[NSKernAttributeName] = @10; // NSNumber,文本字间距（字与字之间的距离）    dict[NSLinkAttributeName] = [NSURL URLWithString:@"http:baidu.com"];      // NSURL或者是链接字符串,文本链接样式，自带下划线，文本颜色是蓝色    dict[NSLinkAttributeName] = @"http:baidu.com"; // NSURL或者是链接字符串,文本链接样式，自带下划线，文本颜色是蓝色    dict[NSExpansionAttributeName] = @(-0.5);  // NSNumber，本文的扩张倍数，负数的话相当于缩小    dict[NSObliquenessAttributeName] = @(0.7); // NSNumber，本文的斜体程度以及斜体方向，默认0不歪斜，负数相当于右斜，正数相当于左斜，歪斜的程度由数字的大小决定    dict[NSBaselineOffsetAttributeName] = @(15.0);  // NSNumber,行文本基线的偏移量        dict[NSWritingDirectionAttributeName] = @[@(NSWritingDirectionOverride),@(NSWritingDirectionRightToLeft)]; // 貌似是文本写入方向    dict[NSVerticalGlyphFormAttributeName] = @(1); // 文本的垂直与水平，目前在[iOS](http://lib.csdn.net/base/ios),它总是水平，任何其他值的行为是未定义的        NSTextAttachment *textAtt = [[NSTextAttachment alloc] init];    textAtt.image = [UIImage imageNamed:@"cloud.png"];    dict[NSAttachmentAttributeName] = textAtt; // 在文本中插入表情        label.attributedText = [[NSAttributedString alloc] initWithString:string attributes:dict];

2、NSMutableAttributedString可变属性字符串，创建出来之后可修改其属性，也可以给文本在某一个范围内添加单个属性或者字典属性（一次性添加很多属性），比如一个属性字符串不同范围的颜色不一样，其属性介绍以及用法，直接在代码上标注如下：

 

     UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 100, CGRectGetWidth(self.view.frame), 300)];    label.numberOfLines = 0;    [self.view addSubview:label];    label.backgroundColor = [UIColor lightGrayColor];        NSString *string = @"今日头条是一款基于数据挖掘的推荐引擎产品，它为用户推荐有价值的、个性化的信息，提供连接人与信息的新型服务，是国内移动互联网领域成长最快的产品服务之一。";        NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:string];    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];    [paragraphStyle setLineSpacing:10];        [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, string.length)];    //    [attributedString addAttributes:<#(nonnull NSDictionary *)#> range:<#(NSRange)#>]; // 添加字典属性    [attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 10)];        label.attributedText = attributedString;

NSMutableParagraphStyle的部分属性：

 

typedef NS_ENUM(NSInteger, NSLineBreakMode) {/* What to do with long lines */  
    NSLineBreakByWordWrapping = 0,     /* Wrap at word boundaries, default */  
    NSLineBreakByCharWrapping,/* Wrap at character boundaries */  
    NSLineBreakByClipping,/* Simply clip */剪掉后面显示不了的部分  
    NSLineBreakByTruncatingHead,/* Truncate at head of line: "...wxyz" */头部分的内容以……方式省略  
    NSLineBreakByTruncatingTail,/* Truncate at tail of line: "abcd..." */结尾部分的内容以……方式省略  
    NSLineBreakByTruncatingMiddle/* Truncate middle of line:  "ab...yz" */中间部分的内容以……方式省略  
} NS_ENUM_AVAILABLE_IOS(6_0);  
  
  
  
  
  
typedef NS_ENUM(NSInteger, NSWritingDirection) {  
    NSWritingDirectionNatural       = -1,    // Determines direction using the Unicode Bidi Algorithm rules P2 and P3  
    NSWritingDirectionLeftToRight   =  0,    // Left to right writing direction 左到右的书写方向  
    NSWritingDirectionRightToLeft   =  1    // Right to left writing direction 右到左的书写方向  
} NS_ENUM_AVAILABLE_IOS(6_0);  
  
  
  
  
  
  
  
 //   NSParagraphStyleAttributeName 段落的风格（设置首行，行间距，对齐方式什么的）看自己需要什么属性，写什么  
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];  
    paragraphStyle.lineSpacing = 10;// 字体的行间距  
    paragraphStyle.firstLineHeadIndent = 20.0f;//首行缩进  
    paragraphStyle.alignment = NSTextAlignmentJustified;//（两端对齐的）文本对齐方式：（左，中，右，两端对齐，自然）  
    paragraphStyle.lineBreakMode = NSLineBreakByTruncatingTail;//结尾部分的内容以……方式省略 ( "...wxyz" ,"abcd..." ,"ab...yz")  
    paragraphStyle.headIndent = 20;//整体缩进(首行除外)  
    paragraphStyle.tailIndent = 20;//  
    paragraphStyle.minimumLineHeight = 10;//最低行高  
    paragraphStyle.maximumLineHeight = 20;//最大行高  
    paragraphStyle.paragraphSpacing = 15;//段与段之间的间距  
    paragraphStyle.paragraphSpacingBefore = 22.0f;//段首行空白空间/* Distance between the bottom of the previous paragraph (or the end of its paragraphSpacing, if any) and the top of this paragraph. */  
    paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight;//从左到右的书写方向（一共??三种）  
    paragraphStyle.lineHeightMultiple = 15;/* Natural line height is multiplied by this factor (if positive) before being constrained by minimum and maximum line height. */  
    paragraphStyle.hyphenationFactor = 1;//连字属性 在iOS，唯一支持的值分别为0和1  
  
  
  
  
  
  
  
/* 
     NSFontAttributeName 字体大小 
     NSParagraphStyleAttributeName 段落的风格（设置首行，行间距，对齐方式什么的） 
     NSKernAttributeName 字间距 
     */  
    NSDictionary *attributes = @{  
                                 NSFontAttributeName:[UIFont systemFontOfSize:15],  
                                 NSParagraphStyleAttributeName:paragraphStyle,  
                                 NSKernAttributeName:@(10),  
                                                                
                                 };  
    textView.attributedText = [[NSAttributedString alloc] initWithString:textView.text attributes:attributes];

3、NSMutableParagraphStyle
用于设定文本段落有关设置，比如行间距，文本缩进，段间距等等，其用法如下：

 

 UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 100, CGRectGetWidth(self.view.frame), 300)];
    label.numberOfLines = 0;
    [self.view addSubview:label];
    label.backgroundColor = [UIColor lightGrayColor];
    
    NSString *string = @"今日头条是一款基于数据挖掘的推荐引擎产品，它为用户推荐有价值的、个性化的信息，提供连接人与信息的新型服务，是国内移动互联网领域成长最快的产品服务之一。";
    /*  文本段落样式
     //    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];
     //    paragraphStyle.lineSpacing = 10;                  // 段落行距
     //    paragraphStyle.headIndent = 5;                    // 非首行文本缩进
     //    paragraphStyle.tailIndent = -20;                  // 文本缩进(右端)
     //    paragraphStyle.firstLineHeadIndent = 20;          // 首行文本缩进
     //    paragraphStyle.alignment = NSTextAlignmentRight;  // 文本对齐方式
     //    paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping; // 折行方式
     //    paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight; // 文本写入方式
     //    paragraphStyle.lineHeightMultiple = 3.0;          // 文本行间距是默认行间距的多少倍
     //    paragraphStyle.maximumLineHeight = 50;            // 文本最大行距
     //    paragraphStyle.minimumLineHeight = 50;            // 文本最小行距
     //    paragraphStyle.allowsDefaultTighteningForTruncation = YES; // 目前还不知道有什么作用
     
     //    paragraphStyle.hyphenationFactor = 1.0; // 设置每行的最后单词是否截断，在0.0-1.0之间，默认为0.0，越接近1.0单词被截断的可能性越大，
     
     //    paragraphStyle.paragraphSpacing = 10;             // 段落后面的间距
     //    paragraphStyle.paragraphSpacingBefore = 20;       //设置段与段之间的距离
     */
    //    dict[NSParagraphStyleAttributeName] = paragraphStyle;                     // NSParagraphStyle，文本段落样式
    label.attributedText = [[NSAttributedString alloc] initWithString:string attributes:dict];

属性字符串基本上就那么多内容，只不过需要在应用中灵活运用而已。

作者：愛我你就抱抱我
链接：https://www.jianshu.com/p/e0340f65b0fb
来源：简书
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

 

 

os中设置行间距和字间距根据内容获取高度

 (2019-03-15 13:19:59)

转载▼

分类： iOS技术

//       //设置label的行间距

      NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:weakSelf.fj_footerLable.text];

      NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

       [paragraphStyle setLineSpacing:autoScaleW(5)];

       [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [weakSelf.fj_footerLable.text length])];

 

       [weakSelf.fj_footerLable setAttributedText:attributedString];

-(void)setLabelSpace:(UILabel)label withValue:(NSString)str withFont:(UIFont)font {
NSMutableParagraphStyle paraStyle = [[NSMutableParagraphStyle alloc] init];
paraStyle.lineBreakMode = NSLineBreakByCharWrapping;
paraStyle.alignment = NSTextAlignmentLeft;
paraStyle.lineSpacing = 6; //设置行间距
paraStyle.hyphenationFactor = 1.0;
paraStyle.firstLineHeadIndent = 0.0;
paraStyle.paragraphSpacingBefore = 0.0;
paraStyle.headIndent = 0;
paraStyle.tailIndent = 0;
//设置字间距 NSKernAttributeName:@1.5f
NSDictionary *dic = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:paraStyle, NSKernAttributeName:@1.5f
};

}

 

//计算UILabel的高度(带有行间距的情况)

-(CGFloat)getSpaceLabelHeight:(NSString)str withFont:(UIFont)font withWidth:(CGFloat)width {
NSMutableParagraphStyle paraStyle = [[NSMutableParagraphStyle alloc] init];
paraStyle.lineBreakMode = NSLineBreakByCharWrapping;
paraStyle.alignment = NSTextAlignmentLeft;
paraStyle.lineSpacing = 6;
paraStyle.hyphenationFactor = 1.0;
paraStyle.firstLineHeadIndent = 0.0;
paraStyle.paragraphSpacingBefore = 0.0;
paraStyle.headIndent = 0;
paraStyle.tailIndent = 0;
NSDictionary dic = @{NSFontAttributeName:font, NSParagraphStyleAttributeName:paraStyle, NSKernAttributeName:@1.5f
};

}

 

 

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