How to sequentially run an animation * only once * after animation on a group (e.g. siblings)

问题

Here's my dilemma. I have 2 animations that need to run sequentially.

The first animation runs on a group of elements acquired through jQuery's siblings() function.

The second animation runs on a single element. (The one upon which siblings() was called.) This needs to take place after the first animation has finished.

If I don't use queue() or a callback after the first animation, they run simultaneously.

If I do use queue() or a callback after the first, then the second animation ends up running numerous times (once for each of the siblings).

So how do I successfully queue an animation to run ONCE after a group animation?

(I found a hack that works, but I'm hoping there's a proper way to accomplish this.)

Simplified example:

<html>
<head>
<title>tester page</title>
<style> 
 <!--
.fadebutton, .resizebutton {
cursor: pointer;
color: white;
margin: 10px 0 10px 0;
background: blue;
padding: 2px;
display: table;
}
.box {
width: 100px;
height: 100px;
background: orange;
margin: 10px;
float: left;
}
 -->
</style>
<script src="http://www.google.com/jsapi"></script>
<script type="text/javascript">google.load("jquery", "1.3.2");</script>
<script type="text/javascript"> 
$('document').ready(function() {
$('.resizebutton').toggle(  function() { $(this).parent().animate({width: '+=50px', height: '+=50px'}, 1000); },
        function() { $(this).parent().animate({width: '-=50px', height: '-=50px'}, 1000); });
$('.fadebutton').click(function() {
 var $theBox = $(this).parent();
 $theBox.siblings().fadeOut(1000, function() { $theBox.find('.resizebutton').click(); });
});
});
</script>
</head>
<body>
<div>
<div class='box'><div class='fadebutton'>Fade</div><div class='resizebutton'>Resize</div></div>
<div class='box'><div class='fadebutton'>Fade</div><div class='resizebutton'>Resize</div></div>
<div class='box'><div class='fadebutton'>Fade</div><div class='resizebutton'>Resize</div></div>
<div class='box'><div class='fadebutton'>Fade</div><div class='resizebutton'>Resize</div></div>
<div class='box'><div class='fadebutton'>Fade</div><div class='resizebutton'>Resize</div></div>
</div>
<div>
<div style="clear: both; padding: 0 0 10px 0; ">Clicking the 'resize' button triggers a toggle that increase or decreases the box's size.</div>
<div>Clicking on the 'fade' button fades the box's siblings, then triggers the 'resize' button in that box. Trouble is that the 'resize' gets fired as many times as there are siblings.</div>
</div>
</body>
</html>

回答1:

Does your hack look something like this?

$('.fadebutton').click(
function() 
{
 var $theBox = $(this).parent();
 var doneOnce = false;
 $theBox.siblings()
        .fadeOut(1000, 
             function() 
             { 
                  if(!doneOnce)
                  {
                  doneOnce = true;
                  $theBox.find('.resizebutton').click(); 
                  }
             }
 );

Here is the working code.

回答2:

You should be able to trigger the second animation by passing in a callback to the first animation so you're notified it completes.

来源：https://stackoverflow.com/questions/1712589/how-to-sequentially-run-an-animation-only-once-after-animation-on-a-group-e

标签

jquery

animation

callback

queue