css - 动画工具提示淡入淡出

Question

如何让这个工具提示显示和隐藏淡入淡出？我尝试添加:

transition: opacity .25s ease-in-out;
-moz-transition: opacity .25s ease-in-out;
-webkit-transition: opacity .25s ease-in-out;

但运气不好，这是我的代码

工具提示 CSS:

.mainButtonContainer button:hover:after
{

    background: none repeat scroll 0 0 rgba(255, 255, 255, 0.7);
    border-color: #093466;
    border-radius: 5px 5px 5px 5px;
    border-style: solid;
    border-width: 7px 2px 2px;
    bottom: -5px;
    color: #093466;
    padding: 5px 15px;
    position: absolute;
    width: 113px;
    z-index: -1;
}

html:

<button  id=mgf_main1 type="button" onclick="loadData(1)">
    <img src="Images/Magof-Icon.png" width="68" height="68"/>
</button>

jsfiddle.net/rdRhS

Answer 1

您需要将描述该元素的所有内容移动到 button:after，并且只更改在 button:hover:after 中悬停时发生变化的属性。

fiddle

button:after {
    opacity: 0;

    -webkit-transition: opacity .25s ease-in-out;
       -moz-transition: opacity .25s ease-in-out;
            transition: opacity .25s ease-in-out;

    content:'';
    background: none repeat scroll 0 0 rgba(255, 255, 255, 0.7);
    border-color: #093466;
    border-radius: 5px 5px 5px 5px;
    border-style: solid;
    border-width: 7px 2px 2px;
    bottom: -5px;
    color: #093466;
    padding: 5px 15px;
    position: absolute;
    top:50px;
    left:70px;
    width: 113px;
    height: 30px;
    z-index: -1;
}

button:hover:after {
    opacity: 1;    
}