(转)iOS学习——UIlabel设置行间距和字间距

时间:2024-11-08 14:05:02

  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:

(转)iOS学习——UIlabel设置行间距和字间距

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:

(转)iOS学习——UIlabel设置行间距和字间距

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(, [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(, [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(, [labelText length])];
label.attributedText = attributedString;
[label sizeToFit];
} @end