在iOS开发中经常会用到UIlabel来展示一些文字性的内容，但是默认的文字排版会觉得有些挤，为了更美观也更易于阅读我们可以通过某些方法将UIlabel的行间距和字间距按照需要调节。
比如一个Label的默认间距效果是这样：
然后用一个封装起来的Category来调整这部分文字的行间距，其中5.0就是我自定义的文字间距：
[UILabel changeLineSpaceForLabel:cell.describeLabel WithSpace:5.0];
调整后的效果是这样的：
这是一个UILabel 的Category，他的内部实现是这样的：
UILabel+ChangeLineSpaceAndWordSpace.h
#import <UIKit/UIKit.h> @interface UILabel (ChangeLineSpaceAndWordSpace) /** * 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
UILabel+ChangeLineSpaceAndWordSpace.m
#import "UILabel+ChangeLineSpaceAndWordSpace.h" @implementation UILabel (ChangeLineSpaceAndWordSpace) + (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]; } + (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]; } + (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