1,创建分类并声明所需的类方法 .h文件

#import 
    
     @interface UILabel (AKSpace)/** *  改变行间距 */+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space;/** *  改变字间距 */+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space;/** *  改变行间距和字间距 */+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace;@end
    

2,实现类方法 .m文件

#import "UILabel+AKSpace.h"@implementation UILabel (AKSpace)//改变字体行间距+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space {        NSString *labelText = label.text;    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];    [paragraphStyle setLineSpacing:space];    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];    label.attributedText = attributedString;    [label sizeToFit];}//改变字体字间距+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space {        NSString *labelText = label.text;    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(space)}];    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];    label.attributedText = attributedString;    [label sizeToFit];}//改变字体行间距与间距+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace {        NSString *labelText = label.text;    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(wordSpace)}];    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];    [paragraphStyle setLineSpacing:lineSpace];    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];    label.attributedText = attributedString;    [label sizeToFit];    }@end

3,使用方法

  UILabel默认排版:

加入行间与字间距后的排版: