我到处寻找,似乎没有解决我的问题。这是HTML,它只包含一个纯HTML登录表单:
body{
background-image:url(http://i63.tinypic.com/raytyu.jpg);
background-size:cover;
background-repeat: no-repeat;
}
.h1Tag{
padding: 0px;
font-size: 150%;
text-align: center;
font-family: Arial, Helvetica, sans-serif;
color: #fff;
}
ul{
list-style-type:none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #b2e0ef;
}
li{
float: center;
}
a:hover:not(.active) {
background-color: #3399ff;
text-decoration:none;
}
li a{
display: block;
text-align: center;
padding: 14px 16px;
text-decoration: none;
color: white;
font-weight:bold;
}
/*-----------LOGIN FORM CSS-------------------*/
#login_form{
background-color: rgba(178,224,239,0.6);
position:center;
padding: 20px;
position: absolute;
margin-left: 550px;
margin-right: 550px;
margin-top: 150px;
border-radius:3px;
border: 1px solid;
border-color: #fff;
}
.login_form{
text-align:center;
font-size: 20px;
}

<div id="login_form">
<div class="h1Tag">
<h1>MyGarden</h1>
</div>
<div class="login_form">
<input type="text" name="email" id="email" placeholder="Email address"><br>
<input type="password" name="password" id="password" placeholder="Password"><br><br>
<button type="submit" id="submit" name="submit">Log In</button>
</div>
</div>
&#13;
目前,当我在Google Chrome中启动此功能时,背景和登录表单会正确放置在完全最大化的Chrome窗口中。但是,当我调整窗口大小时,背景会减少并保留在窗口的左上角,而登录表单位于页面的右侧。
登录框div位于#login_form
下,背景位于正文CSS类中。
答案 0 :(得分:3)
编辑以下2个css内容,
设置html的背景而不是body,
将高度设置为100%,
如果你设置background-size:100%100%;然后它将拉伸并占据100%的屏幕
如果你设置背景大小:封面,那么将显示足够的图像部分,而不是图像的整个部分,不会拉伸图像
1。
html {
background-image: url(http://i63.tinypic.com/raytyu.jpg);
background-size: cover;
background-repeat: no-repeat;
background-size: 100% 100%;
height: 100%;
}
不要在px中设置边距,以%为单位设置 设置框的宽度并删除px边距 删除位置,这里不需要
2
#login_form {
background-color: rgba(178,224,239,0.6);
position: center;
padding: 20px;
/* position: absolute; */
margin-left: auto;
margin-right: auto;
margin-top: 10%;
border-radius: 3px;
border: 1px solid;
border-color: #fff;
width: 235px;
}
答案 1 :(得分:1)
使用下面的css,链接到最后一次尝试更改图片网址的代码簿,如果它不起作用
body{
background:url(https://pixabay.com/static/uploads/photo/2014/01/22/19/44/flower-garden-250016_960_720.jpg) no-repeat center center;
background-size:cover;
}
.h1Tag{
padding: 0px;
font-size: 150%;
text-align: center;
font-family: Arial, Helvetica, sans-serif;
color: #fff;
}
ul{
list-style-type:none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #b2e0ef;
}
li{
float: center;
}
a:hover:not(.active) {
background-color: #3399ff;
text-decoration:none;
}
li a{
display: block;
text-align: center;
padding: 14px 16px;
text-decoration: none;
color: white;
font-weight:bold;
}
/*-----------LOGIN FORM CSS-------------------*/
#login_form{
background-color: rgba(178,224,239,0.6);
padding: 20px;
position: relative;
margin-left: auto;
margin-right: auto;
margin-top: 150px;
border-radius:3px;
border: 1px solid;
border-color: #fff;
width:250px;
}
.login_form{
text-align:center;
font-size: 20px;
}
答案 2 :(得分:1)
试试这个:
#login_form {
background-color: rgba(178,224,239,0.6);
position: center;
padding: 20px;
/* position: absolute; */
/* margin-right: 550px; */
/* margin-top: 150px; */
border-radius: 3px;
border: 1px solid;
border-color: #fff;
margin: 150px auto;
width: 236px;
}
答案 3 :(得分:1)
https://jsfiddle.net/3j3wcypx/
在您的HTML中我只是添加两个divs
作为您.login_form
的父母,并将background
提供给超级parent
<div class="container">
<div class="login">
<div id="login_form">
<div class="h1Tag">
<h1>MyGarden</h1>
</div>
<div class="login_form">
<input type="text" name="email" id="email" placeholder="Email address"><br>
<input type="password" name="password" id="password" placeholder="Password"><br><br>
<button type="submit" id="submit" name="submit">Log In</button>
</div>
</div>
</div>
</div>
和css我从#login_form
移除了边距,并将其display:inline-block
给了它,因此它将水平居中,其父.login
diplay:table-cell
垂直居中:
.container{
background-image:url(http://i63.tinypic.com/raytyu.jpg);
background-size:cover;
background-repeat: no-repeat;
position:absolute;
top:0;
right:0;
width:100%;
height:100%;
display:table;
}
.login{
display:table-cell;
vertical-align:middle;
text-align:center;
}
.h1Tag{
padding: 0px;
font-size: 150%;
text-align: center;
font-family: Arial, Helvetica, sans-serif;
color: #fff;
}
ul{
list-style-type:none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #b2e0ef;
}
li{
float: center;
}
a:hover:not(.active) {
background-color: #3399ff;
text-decoration:none;
}
li a{
display: block;
text-align: center;
padding: 14px 16px;
text-decoration: none;
color: white;
font-weight:bold;
}
/*-----------LOGIN FORM CSS-------------------*/
#login_form{
background-color: rgba(178,224,239,0.6);
position:center;
padding: 20px;
border-radius:3px;
border: 1px solid;
border-color: #fff;
display:inline-block;
}
.login_form{
text-align:center;
font-size: 20px;
}