导航栏菜单位置和悬停

Question

我目前在让弹出式导航栏菜单保持在按钮上方的位置时遇到了一些困难。例如，当您更改浏览器窗口的大小时，您会看到按钮和菜单之间的距离增加和减少。好像菜单正在进一步向上移动。

另一个问题是，当我将鼠标悬停在按钮上方的 <div class="menu"> 上时，菜单会弹出，这是一个问题，我试图将此功能仅保留在按钮内（不在按钮上方）。

这是我正在使用的。希望能帮到你，不胜感激。

#btn-holder {
  background: rgba(255, 255, 255, 0.5);
  position: static;
  z-index: 10;
  bottom: 0;
  right: 0;
  left: 0;
  top: 0;
}

#btn-holder > .button {
  transform: translate(-50%, -50%);
  background-color: #a137a7;
  border: none;
  color: white;
  padding: 8px 13px;
  text-align: center;
  text-decoration: none;
  font-size: 16px;
  position: absolute;
  cursor: pointer;
  right: -1%;
  bottom: -1%;
  font-family: 'Source Sans Pro', sans-serif;
  opacity: .8;
  border-radius: 3px;
}

#btn-holder > .button:hover {
  background-color: #732878;
  color: white;
}

#btn-holder > .menu {
  opacity: 0;
  transition: opacity .5s;
  transform: translate(-50%, -50%);
  background-color: #a137a7;
  border: none;
  color: white;
  text-align: center;
  text-decoration: none;
  position: absolute;
  right: -1%;
  bottom: -16%;
  font-family: 'Source Sans Pro', sans-serif;

    
}

.menu a {
    display: block;
    color: white;
    text-align: center;
    padding: 8px 13px;
    text-decoration: none;
    font-family:'Source Sans Pro', sans-serif;
    opacity: 8;
    position:sticky;
}

.menu a:hover {
  background-color: #732878;
}

.menu > ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  top: 0;
  left: 0;
  right: 0;
  overflow: hidden;
}

.menu p {
  opacity: 1;
  margin: 0;
}

.menu p:after {
    content:"";
    display: block;
    height: 1px;
    vertical-align: bottom;
    border-top: 1px solid #eee;
    opacity: .4;
}

#btn-holder > .button:hover + .menu {
  opacity: 1;
  transistion-delay: 1s;
}

#btn-holder .menu:hover {
  opacity: 1;
  
}

<div id="btn-holder">
  <div class="button">
    <img class="menu" src="http://static.tumblr.com/e2rgcy1/0wvod4uep/menu-drop-icon.png"></a>
  </div>
  <div class="menu">
    <ul>
     <li><a href="/"a target="_blank"><img class="followtmblr" src="http://static.tumblr.com/e2rgcy1/nz3ocovr0/tumblr-follow-icon.png"></a></li>
        
      <li><a href="/games"onclick="window.open(this.href, 'mywin', 
          'toolbar=0,menubar=0,scrollbars=1,height=620,width=700'); return false;"><img class="games" src="https://secure.static.tumblr.com/e2rgcy1/UrWocm53a/games-icon.png"></a></li> 
        
      <li><a href="/"a target="_blank"><img class="blog" src="https://secure.static.tumblr.com/e2rgcy1/i0Nocny7l/blog-icon.png"></a></li>
        
      <li><a href="/"a target="_blank"><img class="twit" src="https://secure.static.tumblr.com/e2rgcy1/liGockmkp/twitter-256.png"></a></li>
        
      <li><a href="/"a target="_blank"><img class="fb" src="http://static.tumblr.com/e2rgcy1/Ywiod4uar/fb-icon.png"></a></li>
      
        </ul>
  </div>
</div>

Answer 1

问题是您的菜单是绝对定位的，并且具有百分比值。随着窗口大小的改变，百分比值也会改变。如果要在这种情况下使用绝对位置，请为底部设置绝对值。

#btn-holder {
  background: rgba(255, 255, 255, 0.5);
  position: static;
  z-index: 10;
  bottom: 0;
  right: 0;
  left: 0;
  top: 0;
}

#btn-holder > .button {
  transform: translate(-50%, -50%);
  background-color: #a137a7;
  border: none;
  color: white;
  padding: 8px 13px;
  text-align: center;
  text-decoration: none;
  font-size: 16px;
  position: absolute;
  cursor: pointer;
  right: 0;
  bottom: 0;
  font-family: 'Source Sans Pro', sans-serif;
  opacity: .8;
  border-radius: 3px;
}

#btn-holder > .button:hover {
  background-color: #732878;
  color: white;
}

#btn-holder > .menu {
  opacity: 0;
  transition: opacity .5s;
  transform: translate(-50%, -50%);
  background-color: #a137a7;
  border: none;
  color: white;
  text-align: center;
  text-decoration: none;
  position: absolute;
  right: 0;
  bottom: -61px;
  font-family: 'Source Sans Pro', sans-serif;

    
}

.menu a {
    display: block;
    color: white;
    text-align: center;
    padding: 8px 13px;
    text-decoration: none;
    font-family:'Source Sans Pro', sans-serif;
    opacity: 8;
    position:sticky;
}

.menu a:hover {
  background-color: #732878;
}

.menu > ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  top: 0;
  left: 0;
  right: 0;
  overflow: hidden;
}

.menu p {
  opacity: 1;
  margin: 0;
}

.menu p:after {
    content:"";
    display: block;
    height: 1px;
    vertical-align: bottom;
    border-top: 1px solid #eee;
    opacity: .4;
}

#btn-holder > .button:hover + .menu {
  opacity: 1;
  transistion-delay: 1s;
}

#btn-holder .menu:hover {
  opacity: 1;
  
}

<div id="btn-holder">
  <div class="button">
    <img class="menu" src="http://static.tumblr.com/e2rgcy1/0wvod4uep/menu-drop-icon.png"></a>
  </div>
  <div class="menu">
    <ul>
     <li><a href="/"a target="_blank"><img class="followtmblr" src="http://static.tumblr.com/e2rgcy1/nz3ocovr0/tumblr-follow-icon.png"></a></li>
        
      <li><a href="/games"onclick="window.open(this.href, 'mywin', 
          'toolbar=0,menubar=0,scrollbars=1,height=620,width=700'); return false;"><img class="games" src="https://secure.static.tumblr.com/e2rgcy1/UrWocm53a/games-icon.png"></a></li> 
        
      <li><a href="/"a target="_blank"><img class="blog" src="https://secure.static.tumblr.com/e2rgcy1/i0Nocny7l/blog-icon.png"></a></li>
        
      <li><a href="/"a target="_blank"><img class="twit" src="https://secure.static.tumblr.com/e2rgcy1/liGockmkp/twitter-256.png"></a></li>
        
      <li><a href="/"a target="_blank"><img class="fb" src="http://static.tumblr.com/e2rgcy1/Ywiod4uar/fb-icon.png"></a></li>
      
        </ul>
  </div>
</div>