蘋果在iOS7中推出了一個新的類NSTextAttachment，它是做圖文混排的利器，本文就是用這個類，只用50行代碼實現文字與表情混排，當然也可以實現段落中的圖文混排。?
首先說一下文字和表情的混排：?
先來做點兒準備工作，搞一個存放表情信息的plist文件?

 NSString *filePath = [[NSBundle mainBundle] pathForResource:@"Image" ofType:@"plist"];NSArray *face = [NSArray arrayWithContentsOfFile:filePath];NSMutableAttributedString *attributeString = [[NSMutableAttributedString alloc] initWithString:text];NSString *regex_emoji =@"\\[[a-zA-Z0-9\\/\\u4e00-\\u9fa5]+\\]";//匹配表情NSError *error =nil;NSRegularExpression *re = [NSRegularExpression regularExpressionWithPattern:regex_emoji options:NSRegularExpressionCaseInsensitive error:&error];if(!re) {NSLog(@"%@", [error localizedDescription]);return attributeString;}NSArray *resultArray = [re matchesInString:text options:0 range:NSMakeRange(0, text.length)];NSMutableArray *imageArray = [NSMutableArray arrayWithCapacity:resultArray.count];//根據匹配范圍來用圖片進行相應的替換for(NSTextCheckingResult *match in resultArray) {//獲取數組元素中得到rangeNSRange range = [match range];//獲取原字符串中對應的值NSString *subStr = [text substringWithRange:range];for(int i =0; i < face.count; i ++) {if([face[i][@"cht"] isEqualToString:subStr]) {//face[i][@"png"]就是我們要加載的圖片//新建文字附件來存放我們的圖片,iOS7才新加的對象NSTextAttachment *textAttachment = [[NSTextAttachment alloc]init];//給附件添加圖片textAttachment.image= [UIImage imageNamed:face[i][@"png"]];//調整一下圖片的位置,如果你的圖片偏上或者偏下，調整一下bounds的y值即可textAttachment.bounds=CGRectMake(0, -8, textAttachment.image.size.width, textAttachment.image.size.height);//把附件轉換成可變字符串，用于替換掉源字符串中的表情文字NSAttributedString *imageStr = [NSAttributedString attributedStringWithAttachment:textAttachment];//把圖片和圖片對應的位置存入字典中NSMutableDictionary *imageDic = [NSMutableDictionary dictionaryWithCapacity:2];[imageDic setObject:imageStr forKey:@"image"];[imageDic setObject:[NSValue valueWithRange:range]forKey:@"range"];//把字典存入數組中[imageArray addObject:imageDic];}}}//4、從后往前替換，否則會引起位置問題for(int i = (int)imageArray.count-1; i >=0; i--) {NSRange range;[imageArray[i][@"range"] getValue:&range];//進行替換[attributeString replaceCharactersInRange:range withAttributedString:imageArray[i][@"image"]];}
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以上代碼段是寫了一個工具類以實現圖文混排，也可以為NSString寫一個分類來實現。下面說一下用法：

NSString *content =@"文字加上表情[得意][酷][呲牙]";NSMutableAttributedString *attrStr = [Utility emotionStrWithString:content];_contentLabel.attributedText= attrStr;
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有了上面的方法，要實現圖片和文字的排布就更容易了，只需要將某些圖片給它設置一個固定的字符對應即可。?
具體方法如下：?
NSString *praiseStr =@”路人甲、路人乙”;

NSString *praiseInfo = [NSString stringWithFormat:@”<點贊> %@”,praiseStr];

NSDictionary *attributesForAll =@{NSFontAttributeName:[UIFont systemFontOfSize:14.0],NSForegroundColorAttributeName:[UIColorgrayColor]};

NSMutableAttributedString*attrStr = [Utility exchangeString:@”<點贊>”withText:praiseInfoimageName:@”dynamic_love_blue”];

有什么不足或者bug歡迎及時溝通！