Question

我想念什么吗？

我正在尝试显示下拉菜单。当我缩小页面时，我可以看到菜单显示在栏上（我只能看到“主页”选项的提示）。但是，当页面完全打开时，似乎根本无法打开。

        <ul>
          <li><a style="color:#1a1a1a;" class="welcometitle">Welcome back! <asp:Label ID="lblusuario" runat="server" ForeColor="#99ccff" Font-Bold="true"></asp:Label></a></li>
          <li style="float:right; background-color: #4CAF50;" class="dropdown"> <a class="dropdown-toggle" data-toggle="dropdown" role="button" <%--onclick="myfunction()"--%> href="#">
              <i class="fa fa-bars"></i>
              </a>
              <ul class="dropdown-menu" role="listbox">
                    <li><a href="#home" role="option">Home</a></li>
                    <li><a href="#about" role="option">About</a></li>
                    <li><a href="#contact" role="option">Contact</a></li>
              </ul>
          </li>
          <li style="float:right; padding-right:10px; padding-top:5px; padding-left:5px;"><input  type="text"  class="form-control" placeholder="Search.." name="search"/></li>
          <li style="float:right; padding-right:0px; padding-top:5px; background-color:#ffffff"><button class="btn"  type="submit"><i class="fa fa-search" style=""></i></button></li>
        </ul>

这是我的CSS代码，我真的不明白我在哪里错了

.searchbar {
    float: left;
    margin: 0px 0;
}
ul#navigation {
    float: left;
    margin: 0 20px 0 0;
}
ul#navigation li {
    display: inline;
    margin-right: 10px;
}

* {box-sizing: border-box;}
ul {
  list-style-type: none;
  margin: 0;
  padding-left: 160px;
  overflow: hidden;
  background-color: #1160a2;
  top:0;
  width:100%;
  position:fixed;
}



/* Dropdown Button */
.dropbtn {
  background-color: #3498DB;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

/* Dropdown button on hover & focus */
.dropbtn:hover, .dropbtn:focus {
  background-color: #2980B9;
}

/* The container <div> - needed to position the dropdown content */
.dropdown {
  position: relative;
  display: inline-block;
}

/* Dropdown Content (Hidden by Default) */
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f1f1f1;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

/* Links inside the dropdown */
.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

/* Change color of dropdown links on hover */
.dropdown-content a:hover {background-color: #ddd}

/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */
.show {display:block;}




li {
  float: left;
}

li a {
  /*display: block;*/
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover:not(.active) {
  color: white;
}

.active {
  background-color: #4CAF50;
}

.search-container {
  float: right;
}

.li input[type=text] {
  padding: 6px;
  margin-top: 8px;
  font-size: 25px;
  border: none;
}

.search-container button {
  float: right;
  padding: 6px 10px;
  margin-top: 2px;
  margin-right: 16px;
  background: #ddd;
  font-size: 17px;
  border: none;
  cursor: pointer;
}

.search-container button:hover {
  background: #ccc;
}

Answer 1

如果有人遇到相同的问题，我发现答案在css类上：

.show {display: block;}

只是添加了“位置：固定”，就是这样

            .show {display: block;
               position: fixed;
              }

ul和li标签之间的下拉菜单没有出现

1 个答案: