Question

我试图更改包含NSCalendar *calendar = [NSCalendar currentCalendar]; NSDateComponents *components = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:myNSDateInstance]; NSInteger year = [components year]; // NSInteger month = [components month]; NSString *yearStr = [NSString stringWithFormat:@"%ld", year];的{{1}}的背景颜色。我试图用div＆amp; href财产。这似乎不起作用。我显然没有针对正确的事情。

我有以下a:target结构。

a:visited

以下是与上述相关的CSS

nav

我有办法实现这个目标吗？

已更新

    <nav id="main-nav">
        <a href="#" ><div></div></a>
        <a href="#"  id="p1" class="current"><div>OPTION - 1</div></a>
        <a href="#" id="p2"><div>OPTION - 2</div></a>
        <a href="#" id="p3"><div>OPTION - 3</div></a>
        <a href="#" id="p4"><div>OPTOIN - 4</div></a>
        <a href="#" id="p5"><div>OPTION - 5</div></a>       
    </nav>

Answer 1

这应该可以解决问题

struct UserHasBirthday: Event {
    let name: String

    init(name: String) {
        self.name = name
    }
}

struct UserWonTheLottery: Event {
    let name: String
    let amount: Int

    init(name: String, amount: Int) {
        self.name = name
        self.amount = amount
    }
}

let events = TestDispatcher()
events.listen {
    (event: UserHasBirthday) in
    print("Happy birthday \(event.name)!")
}
events.listen {
    (event: UserWonTheLottery) in
    print("Congratulations \(event.name) for winning \(event.amount)!")
}

events.push(UserHasBirthday(name: "John Doe"))
events.push(UserHasBirthday(name: "Jane Doe"))
events.push(UserWonTheLottery(name: "Jane Doe", amount: 42000))

events.flush()
/* Happy birthday John Doe!
   Happy birthday Jane Doe!
   Congratulations Jane Doe for winning 42000! */

:target div {
    background: yellow;
}

Answer 2

最简单的方法是删除div，因为它们会覆盖您在：visited和a：hover上定义的标记。因此，如果您只是更改背景颜色，那么设置div的父母的背景颜色＆＃39; a＆＃39;将涵盖div的背景。

我假设您要突出显示带有.current类集的导航项。

＆＃13;

counter

＆＃13;

用于更改包含href的div颜色的CSS

2 个答案: