iOS之文本首尾添加图片

开发中有时会遇到文本首尾添加图片或者表情的需求，直接上代码：

- (NSAttributedString *)attachHeadImage:(UIImage *)headImage footImage:(UIImage *)footImage targatStr:(NSString *)targatStr {
    // 1.创建富文本
    NSMutableAttributedString *attributedStr = [[NSMutableAttributedString alloc]initWithString:targatStr];
    
    // 2.创建NSTextAttachment:做图文混排的利器
    NSTextAttachment *headAttchment = [NSTextAttachment new];
    headAttchment.image = headImage;
    headAttchment.bounds = CGRectMake(0, 0, 15, 15);
    
    NSTextAttachment *footAttchment = [NSTextAttachment new];
    footAttchment.image = footImage;
    footAttchment.bounds = CGRectMake(0, 0, 15, 15);
    
    // 3.将NSTextAttachment转化为NSAttributedString
    NSAttributedString *headImageString = [NSAttributedString attributedStringWithAttachment:headAttchment];
    NSAttributedString *footImageString = [NSAttributedString attributedStringWithAttachment:footAttchment];
    
    // 4.拼接字符串
    [attributedStr insertAttributedString:headImageString atIndex:0];
    [attributedStr appendAttributedString:footImageString];
 
    return attributedStr;
}

效果图：