我已经看到了几种解决方案,它们确定了在滚动页面时某个元素在视口中可见的时间,但我还没有看到任何这样的操作,这些元素包含在滚动容器div
中,如本例中所示。HTML如何判断哪些元素可见?
当他们通过滚动div滚动到视图中时,我将如何检测这些项目?而相比之下,如果他们掉在视线之外,我会如何发现他们。在任何情况下,溢流元件都不会在一开始就隐藏起来。
HTML
<div id="mainContainer" class="main">
<div id="scrollContainer"class="scroller">
<div id="picturesContainer"class="holder">
<div id="pictureContainer1" class="picture position1">
pictureContainer1</div>
<div id="pictureContainer2" class="picture position2">
pictureContainer2</div>
<div id="pictureContainer3" class="picture position3">
pictureContainer3</div>
<div id="pictureContainer4" class="picture position4">
pictureContainer4</div>
<div id="pictureContainer5" class="picture position5">
pictureContainer5</div>
<div id="pictureContainer6" class="picture position6">
pictureContainer6</div>
<div id="pictureContainer7" class="picture position7">
pictureContainer7</div>
<div id="pictureContainer8" class="picture position8">
pictureContainer8</div>
<div id="pictureContainer9" class="picture position9">
pictureContainer9</div>
</div>
</div>
</div>
CSS
.main{
position:absolute;
top:0px;
left:0px;
height: 200px;
width:200px;
background-color: grey;
border: 1px solid black;
}
.scroller{
position:absolute;
top:0px;
left:0px;
height: 250px;
width:250px;
background-color: lightblue;
border: 1px solid black;
overflow: scroll;
}
.picture{
position:absolute;
height: 200px;
width: 200px;
background-color: lightyellow;
border: 1px solid black;
}
.position1{
top:0px;
left:0px;
}
.position2{
top:0px;
left:200px;
}
.position3{
top:0px;
left:400px;
}
.position4{
top:200px;
left:0px;
}
.position5{
top:200px;
left:200px;
}
.position6{
top:200px;
left:400px;
}
.position7{
top:400px;
left:0px;
}
.position8{
top:400px;
left:200px;
}
.position9{
top:400px;
left:400px;
}
.holder{
position:absolute;
top:0px;
left:0px;
width:600px;
height:600px;
background-color:lightgreen;
}
一旦一个对象完全可见,这似乎就工作了。这是继续为我 - 谢谢伊戈尔。如果有人想看到它的工作,我已经把代码[在这里](http://jsfiddle.net/PSjBN/54/)。我会进一步研究这篇文章的更新。 – T9b 2011-06-03 08:58:19