html、xml等标记语言解析。可以方便的转换为NSAttributedString。

把html转换为NSAttributedString

NSString *htmlString = @"<font color=\"#fa8919\" size='58'>43333333</font>";
RHHtmlParser *htmlParser = [[RHHtmlParser alloc] init];
NSAttributedString *attributedString = [htmlParser parseString:htmlString filter:nil];

自定义样式

NSString *htmlString = @"<username>我是username自定义样式</username><password size='20'>我是password自定义样式，注意属性内容</password>";
//自定义样式
NSDictionary *customStyles = @{
                               NSForegroundColorAttributeName: [UIColor orangeColor],
                               NSBackgroundColorAttributeName: [UIColor blueColor]
                               };
[htmlParser addStyle:customStyles forTag:@"username"];
[htmlParser addNodeBlock:^NSAttributedString *(RHNode *node, NSDictionary *defaultStyles) {
    NSString *theContent = node.content ?: @"";
    
    NSString *theSizeString = node.attributes[@"size"];
    NSDictionary *theStyle = @{
                               NSForegroundColorAttributeName: [UIColor redColor],
                               NSFontAttributeName: [UIFont systemFontOfSize:[theSizeString floatValue]]
                               };
    
    NSAttributedString *theAttributedString = [[NSAttributedString alloc] initWithString:theContent attributes:theStyle];
    
    return theAttributedString;
} forTag:@"password"];
NSAttributedString *attributedString = [htmlParser parseString:htmlString filter:nil];