元素悬停在css3淡入淡出效果中无法正常工作

时间：2015-05-25 04:35:07

标签： javascript jquery html css css3

我正在开发一个简单的项目，其中单个块元素悬停将显示4x缩放元素。我是通过纯css和css3过渡完成的。请参阅jsfiddle演示。将有四个元素，每个元素都有不同的悬停元素。但是当我悬停在它上面时，只显示一个悬停元素，尽管它与该块或元素没有关联。

请参阅演示项目，然后一切都将清楚我想说的。

            <style type="text/css">
            .main{
                position: relative;
                width: 300px;
                overflow:hidden
            }
            .main a{
                width: 50%;
                height: 50%; 
                float:left;
            }
            .main a .child{
                position: absolute; 
                left:0;
                right:0;
                bottom:0;
                top:0;
                background: gray;
                filter: alpha(opacity=0);
                opacity: 0;
                -webkit-transition: opacity 0.5s ease-out;
                -moz-transition: opacity 0.5s ease-out;
                -ms-transition: opacity 0.5s ease-out;
                -o-transition: opacity 0.5s ease-out;
                transition: opacity 0.5s ease-out;                  
            }
            .main a:hover .child{
                -webkit-transition: opacity 0.2s ease-in;
                -moz-transition: opacity 0.2s ease-in;
                -ms-transition: opacity 0.2s ease-in;
                -o-transition: opacity 0.2s ease-in;
                transition: opacity 0.2s ease-in; 
                zoom: 1;
                filter: alpha(opacity=100);
                opacity: 1.0;
            }
            </style>

            <div class="main">
                <a href="">
                    <img src="http://placehold.it/150x150">
                    <div class="child">
                        <h4>1Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
                    </div>
                </a>
                <a href="">
                    <img src="http://placehold.it/150x150">
                    <div class="child">
                        <h4>2Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
                    </div>
                </a>
                <a href="">
                    <img src="http://placehold.it/150x150">
                    <div class="child">
                        <h4>3Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
                    </div>
                </a>
                <a href="">
                    <img src="http://placehold.it/150x150">
                    <div class="child">
                        <h4>4Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
                    </div>
                </a>

            </div>

Demo project here:

重要提示：如果我使用display none或block in hover instate css3 transition，那么它工作正常，但我需要淡入淡出效果。

请帮帮我

3 个答案:

答案 0 :(得分：2)

这里的问题是，当悬停在元素上时会显示四个.child元素，但只有最后一个.child可见，要解决此问题，请使用可见性属性 display < /强>：

https://jsfiddle.net/f9m1mnce/ 

.main{
	position: relative;
	width: 300px;
	overflow:hidden	
}
.main a{
	width: 50%;
	height: 50%; 
	float:left;
}
.main a > .child{
	position: absolute; 
	left:0;
	right:0;
	bottom:0;
	top: 0;
    visibility: hidden;
	background: gray;
	filter: alpha(opacity=0);
	opacity: 0;
	-webkit-transition: opacity 0.5s ease-out;
	-moz-transition: opacity 0.5s ease-out;
	-ms-transition: opacity 0.5s ease-out;
	-o-transition: opacity 0.5s ease-out;
	transition: opacity 0.5s ease-out;					
}
.main a:hover > .child{
	-webkit-transition: opacity 0.2s ease-in .2;
	-moz-transition: opacity 0.2s ease-in .2 ;
	-ms-transition: opacity 0.2s ease-in .2;
	-o-transition: opacity 0.2s ease-in .2;
	transition: opacity 0.2s ease-in .2; 
    top: 0;
    visibility: visible;
	zoom: 1;
	filter: alpha(opacity=100);
	opacity: 1.0;
}
<div class="main">
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>1 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>2 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>3 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	<a href="">
		<img src="http://placehold.it/150x150">
		<div class="child">
			<h4>4 Lorem Ipsum is simply dummy text of the printing and typesetting industry.</h4>
		</div>
	</a>
	
</div>

答案 1 :(得分：0)

绝对元素与其父相对元素相关联，在演示中的演示中，您需要设置相对于标签的位置 

.main a{
    width: 50%;
    height: 50%; 
    float:left;
    position:relative;
}

答案 2 :(得分：0)

您可以尝试使用 ::before

<强> HTML 

<ul id="content-ul">
    <li>
        <a href="#" target="_blank" titulo="Lorem 1">
            <img src="http://placehold.it/150x150" />
        </a>
    </li>
    <li>
        <a href="#" target="_blank" titulo="Lorem 2">
            <img src="http://placehold.it/150x150" />
        </a>
    </li>
    <li>
        <a href="#" target="_blank" titulo="Lorem 3">
            <img src="http://placehold.it/150x150" />
        </a>
    </li>
    <li>
        <a href="#" target="_blank" titulo="Lorem 4">
            <img src="http://placehold.it/150x150" />
        </a>
    </li>
</ul>

<强> CSS： 

#content-ul{
    display: block;
    width: 340px;
    margin: auto;
    overflow: hidden;
}
#content-ul li,#content-ul li a{
    display: block;
    position: relative;
    width: 150px;
    height: 150px;
    float: left;
    overflow: hidden;
}
#content-ul li{
    margin: 10px 10px ;
}
#content-ul li a{
    text-decoration: none;
    color: #fff;
    font-size: 14px;
    text-shadow: 0 1px 0 #000;
    font-weight: bold;
    border-radius: 4px;
}
#content-ul li a img{
    border-radius: 4px;

}
#content-ul li a:before{
    visibility: hidden;
    content: attr(titulo);
    position: absolute;
    line-height: 250px;
    float: left;
    width: 150px;
    height: 150px;
    background: rgba(0,0,50,.5);
    border-radius: 4px;
    overflow: hidden;
    text-align: center;
    font-size: 25px;

    filter: alpha(opacity=0);
    opacity: 0;
    -webkit-transition: opacity 0.5s ease-out;
    -moz-transition: opacity 0.5s ease-out;
    -ms-transition: opacity 0.5s ease-out;
    -o-transition: opacity 0.5s ease-out;
    transition: opacity 0.5s ease-out;

}
#content-ul li a:hover::before{
    -webkit-transition: opacity 0.2s ease-in;
    -moz-transition: opacity 0.2s ease-in;
    -ms-transition: opacity 0.2s ease-in;
    -o-transition: opacity 0.2s ease-in;
    transition: opacity 0.2s ease-in; 
    zoom: 1;
    filter: alpha(opacity=100);
    opacity: 1.0;
    visibility: visible;
}

<强> Working Demo

这是基于您的代码的更新：

<强> HTML： 

 <div class="main">
    <a href="" content="1Lorem Ipsum is simply dummy text of the printing and typesetting industry.">
        <img src="http://placehold.it/150x150">
    </a>
    <a href="" content="2Lorem Ipsum is simply dummy text of the printing and typesetting industry.">
        <img src="http://placehold.it/150x150">
    </a>
    <a href="" content="3Lorem Ipsum is simply dummy text of the printing and typesetting industry.">
        <img src="http://placehold.it/150x150">
    </a>
    <a href="" content="4Lorem Ipsum is simply dummy text of the printing and typesetting industry.">
        <img src="http://placehold.it/150x150">
    </a>
</div>

<强> CSS： 

.main{
    position: relative;
    width: 300px;
    overflow:hidden
}
.main a{
    width: 50%;
    height: 50%; 
    float:left;
}       
.main a:before{
    visibility: hidden;
    content: attr(content);
    position: absolute;
    line-height: 250px;
    float: left;
    width: 150px;
    height: 150px;
    background: rgba(0,0,50,.5);
    border-radius: 4px;
    overflow: hidden;
    text-align: center;
    font-size: 25px;
    filter: alpha(opacity=0);
    opacity: 0;
    -webkit-transition: opacity 0.5s ease-out;
    -moz-transition: opacity 0.5s ease-out;
    -ms-transition: opacity 0.5s ease-out;
    -o-transition: opacity 0.5s ease-out;
    transition: opacity 0.5s ease-out;
}
.main a:hover::before{
    -webkit-transition: opacity 0.2s ease-in;
    -moz-transition: opacity 0.2s ease-in;
    -ms-transition: opacity 0.2s ease-in;
    -o-transition: opacity 0.2s ease-in;
    transition: opacity 0.2s ease-in; 
    zoom: 1;
    filter: alpha(opacity=100);
    opacity: 1.0;
    visibility: visible;
}

<强> Working Demo

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