图文混排之NSAttributedString

-(NSAttributedString *)imagesWithimgName:(NSString* )imgName offsetY:(CGFloat)offsetY{    NSTextAttachment * textAttachment = [[NSTextAttachment alloc]init];    UIImage * smileImage = [ UIImage imageNamed:imgName];    textAttachment.image = smileImage ;    textAttachment.bounds = CGRectMake(0, offsetY, smileImage.size.width, smileImage.size.height);    return [NSAttributedString attributedStringWithAttachment:textAttachment];}-(void)appendImgStr:(NSString* )imgName offsetY:(CGFloat)offsetY{    [self appendAttributedString:[self imagesWithimgName:imgName offsetY:offsetY]];}