不工作悬停

Question

我不知道为什么这个悬停不起作用，没有负面的z-index或类似的东西。在最好的情况下，它在悬停时闪烁;

.menu{
border-radius: 50%;
width: 100px;
height: 100px;
background: white;
box-shadow:0 4px 10px 0 rgba(0,0,0,0.2),0 4px 20px 0 rgba(0,0,0,0.19);
background-image: url("home.png");
background-repeat: no-repeat;
background-size: 60% 60%;
background-position: 20px 15px;
position: absolute;
z-index: 1;
}
.menucontent{
    height:100px;
    width: 400px;
    box-shadow:0 4px 10px 0 rgba(0,0,0,0.2),0 4px 20px 0 rgba(0,0,0,0.19);
    position: absolute;
    display:none;
}
.menu:hover .menucontent{
  display: inline;
}

https://jsfiddle.net/jwwhj9rr/1/

Answer 1

解决方案1 ​​

你可以这样做

.menu:hover ~.menucontent {
  display: inline;
}

下面的代码段

＆＃13;

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.menu {
  border-radius: 50%;
  width: 100px;
  height: 100px;
  background: white;
  box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.2), 0 4px 20px 0 rgba(0, 0, 0, 0.19);
  background-image: url("home.png");
  background-repeat: no-repeat;
  background-size: 60% 60%;
  background-position: 20px 15px;
  position: absolute;
  z-index: 1;
}

.menucontent {
  height: 100px;
  width: 400px;
  box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.2), 0 4px 20px 0 rgba(0, 0, 0, 0.19);
  position: absolute;
  display: none;
}

.menu:hover ~.menucontent {
  display: inline;
}

＆＃13;

<div class="menu" style="left: 100px; top: 100px; ;"></div>
<div class="menucontent" style="left: 150px; top:100px;"></div>

＆＃13;

＆＃13;

＆＃13;

Answer 2

.menucontent是.menu的兄弟，因此应使用像~或+这样的兄弟选择器来选择

.menu:hover + .menucontent {
  display: inline;
}

＆＃13;

＆＃13;

.menu {
  border-radius: 50%;
  width: 100px;
  height: 100px;
  background: white;
  box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.2), 0 4px 20px 0 rgba(0, 0, 0, 0.19);
  background-image: url("home.png");
  background-repeat: no-repeat;
  background-size: 60% 60%;
  background-position: 20px 15px;
  position: absolute;
  z-index: 1;
}

.menucontent {
  height: 100px;
  width: 400px;
  box-shadow: 0 4px 10px 0 rgba(0, 0, 0, 0.2), 0 4px 20px 0 rgba(0, 0, 0, 0.19);
  position: absolute;
  display: none;
}

.menu:hover + .menucontent {
  display: inline;
}

＆＃13;

<div class="menu" style="left: 100px; top: 100px; ;"></div>
<div class="menucontent" style="left: 150px; top:100px;"></div>

＆＃13;

＆＃13;

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