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

label.normalAttributes = @{NSFontAttributeName: [UIFont systemFontOfSize:20],
                          NSForegroundColorAttributeName: [UIColor redColor]};

[label addTagAdapter:({
        YNRichTagAdapter *adapter = [[YNRichTagAdapter alloc] init];
        adapter.tagName = @"a";
        adapter.attributesBlock = ^NSDictionary<NSAttributedStringKey,id> *(YNRichTagModel *model, NSString *text, NSDictionary<NSAttributedStringKey,id> *normalAttributes) {
            NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithDictionary:normalAttributes];
            [dic addEntriesFromDictionary:@{NSForegroundColorAttributeName: [UIColor blueColor]
                                            }];
            return dic;
        };
        adapter.clickBlock = ^(YNRichTagModel *model) {
            NSLog(@"%@",model.attributes);
        };
        adapter;
    })];

[label addTagAdapter:({
        YNRichTagAdapter *adapter = [[YNRichTagAdapter alloc] init];
        adapter.tagName = @"b";
        adapter.attributesBlock = ^NSDictionary<NSAttributedStringKey,id> *(YNRichTagModel *model, NSString *text, NSDictionary<NSAttributedStringKey,id> *normalAttributes) {
            NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithDictionary:normalAttributes];
            [dic addEntriesFromDictionary:@{NSFontAttributeName: [UIFont boldSystemFontOfSize:24]
                                            }];
            return dic;
        };
        adapter;
    })];

[label addTagAdapter:({
        YNRichTagAdapter *adapter = [[YNRichTagAdapter alloc] init];
        adapter.tagName = @"br";
        adapter.textBlock = ^NSString *(YNRichTagModel *model) {
            return @"\n";
        };
        adapter;
    })];

label.text = @"这里是<br/>普通内容\n<a href=\"www.google.com\">这里是a的内容</a>\n<b>这里是b的内容</b>\n<a>这里是a<b>嵌套</b>b的内容</a>\n<b>这里是b<a>嵌套</a>a的内容</b>\n这里是普通内容\n<d>这里是d的内容</d>\n这里是普通内容<br/>换行标签<br/><br/><br/>Free for min order<br/> of <b>SGD</b> 20.00 from<a href=\"www.google.com\">Taobao Collection</a>";