富文本,图文混排

1.控制器代码

#import "ViewController.h"

#import "NSAttributedString+Emoji.h"

 

@interface ViewController ()

 

@property(nonatomic,strong)UILabel*labelText;

 

@end

 

@implementation ViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

    UILabel *label=[[UILabel alloc]init];

    label.frame=CGRectMake(10, 30, 300, 300);

    NSString *str=@"大脸毅s012 s013 s014 s015dfadsfasdfs dfdf";

    label.numberOfLines=0;

    self.labelText=label;

    //self.labelText.backgroundColor=[UIColor grayColor];

    [self.view addSubview:label];

    //特殊文本 加表情 方法一

    //[self text1WithStr:str];

    

    //自定义类递归实现 方法二

    NSMutableAttributedString *attriM=[[NSMutableAttributedString alloc]initWithString:str];

    NSAttributedString *result=[NSAttributedString emojiStringWithString:attriM];

    self.labelText.attributedText=result;

    

    

    

    

    

}

-(void)text1WithStr:(NSString*)str

{

    //属性字符串 只有文本的属性字符串

    NSAttributedString *strm=[[NSAttributedString alloc]initWithString:str];

    

    //创建一个带图片的附件对象

    NSTextAttachment *atchment=[[NSTextAttachment alloc]init];

    //给附件对象添加image;

    atchment.image=[UIImage imageNamed:@"s012.png"];

    NSAttributedString *strImage=[NSAttributedString attributedStringWithAttachment:atchment];

    //用可变字符串来替换拼接附件文本和普通文本

    NSMutableAttributedString *attributedStringM=[[NSMutableAttributedString alloc]initWithAttributedString:strm];

    //正则表达式

    NSString *pattren=@"[s][0-9]{3}";

    NSRegularExpression *regular=[NSRegularExpression regularExpressionWithPattern:pattren options:1 error:NULL];

    NSTextCheckingResult *result=[regular firstMatchInString:str options:1 range:NSMakeRange(0, str.length)];

    

    [attributedStringM replaceCharactersInRange:result.range withAttributedString:strImage];

    self.labelText.attributedText=attributedStringM;

 

}

 

@end

2.分类代码

 

#import <Foundation/Foundation.h>

 

@interface NSAttributedString (Emoji)

 

+ (NSAttributedString *)emojiStringWithString:(NSMutableAttributedString *)emojiString;

 

@end

 

#import "NSAttributedString+Emoji.h"

#import <UIKit/UIKit.h>

@interface EmojiAttachment : NSTextAttachment

 

@end

 

@implementation EmojiAttachment

 

//I want my emoticon has the same size with line's height

- (CGRect)attachmentBoundsForTextContainer:(NSTextContainer *)textContainer proposedLineFragment:(CGRect)lineFrag glyphPosition:(CGPoint)position characterIndex:(NSUInteger)charIndex

{

    return CGRectMake( 0 , -3, lineFrag.size.height, lineFrag.size.height);

}

 

@end

 

 

@implementation NSAttributedString (Emoji)

 

+ (NSAttributedString *)emojiStringWithString:(NSMutableAttributedString *)emojiString

{

    NSRegularExpression *regularEx = [NSRegularExpression regularExpressionWithPattern:@"s[0-9]{3}" options:NSRegularExpressionCaseInsensitive error:nil];

    NSString *string = emojiString.string;

    NSTextCheckingResult *result = [regularEx firstMatchInString:string options:NSMatchingReportCompletion range:NSMakeRange(0, string.length)];

    if (result != nil) {

        NSString *imageName = [NSString stringWithFormat:@"%@.png", [string substringWithRange:result.range]];

        EmojiAttachment *attachment = [[EmojiAttachment alloc] initWithData:nil ofType:nil];

        attachment.image = [UIImage imageNamed:imageName];

        NSAttributedString *attrString = [NSAttributedString attributedStringWithAttachment:attachment];

        [emojiString replaceCharactersInRange:result.range withAttributedString:attrString];

        // 递归

        [self emojiStringWithString:emojiString];

    } else {

        return emojiString;

    }

    return emojiString;

}

 

@end