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问题:

I have a Bee image and I want to animate it using jQuery.

The idea is to move the image from left (outside of screen) to right (outside of screen) to create an effect like it's flying.

回答1:

Your bee needs to be absolutely positioned, something like this:

<div id="b" style="position:absolute; top:50px">B</div>

I've used a div here, but it could just as well be an <img> tag. As meo pointed out, don't forget the top attribute, because some browsers don't work without it. Then you can animate it:

$(document).ready(function() {
    $("#b").animate({left: "+=500"}, 2000);
    $("#b").animate({left: "-=300"}, 1000);
});

Here is a jsfiddle demo.

If you want to have a continuous animation as Hira pointed out, put the animation code in functions, make sure the left and right movement is the same, and use the onComplete option of animate() to call the next animation:

function beeLeft() {
    $("#b").animate({left: "-=500"}, 2000, "swing", beeRight);
}
function beeRight() {
    $("#b").animate({left: "+=500"}, 2000, "swing", beeLeft);
}

beeRight();

And the fiddle for that.

回答2:

Try spritely: http://spritely.net/

回答3:

i would do something like this: http://jsfiddle.net/Uwuwj/2/

var b = function($b,speed){
var beeWidth = $b.width();

$b.animate({ //animates the bee to the right side of the screen
    "left": "100%"
}, speed, function(){ //when finished it goes back to the left side
    $b.animate({
        "left": 0 - beeWidth + "px"
    }, speed, function(){
        b($b, speed) //finally it recalls the same function and everything starts again
    });
});
};

$(function(){ //document ready
    b($("#b"), 5000); //calls the function
});

bee careful, this code only works with bee's :P

回答4:

In case you want the bee to keep flying across the screen, try this :-)

<html>
<head>
    <script type="text/javascript" src="jquery/js/jquery-1.4.4.min.js"></script>

    <script type="text/javascript">
        function animateImage() {
            console.log("Called");
            $('#bee').css({right:'10%'});   
            $('#bee').animate({right: '-100%'}, 5000, 'linear', function(){animateImage();});
        }
        $(document).ready(function() {
            animateImage();             
        }); 
    </script>
</head>
<body>
    <div style="width: 100%;"><img src="bee.jpg" id="bee" style="position:relative;"/></div>

</body>

回答5:

 <script type="text/javascript" src="jquery/js/jquery-1.4.4.min.js"></script>

    <script type="text/javascript">
        $(document).ready(function () {
          function rgt() {
              $('#sldr').animate({ left: "500" }, 10000, hider);
            }
            rgt();
            function hider() {
            $('#sldr').css('left', '0px');
                rgt();
            }
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
     <div>
         <img id="sldr" src="../Images/animated%20images/birds/rightfuglan.gif" style="position:absolute" />
      </div>
    </form>
</body

回答6:

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <script src="../Scripts/jquery-1.10.2.js" type="text/javascript"></script>
    <title></title>
    <script type="text/javascript">
        $(document).ready(function () {
            var k = $(window).width();

            function rgt() {
                $('#sldl').hide(1);
                $('#sldr').animate({ left: "1000" }, 10000, hider);
            }
            rgt();

            function hider() {
                $('#sldr').css('left', '0px');
                $('#sldr').hide(1);
                $('#sldl').show();
                lft();
            }

            function lft() {
                $('#sldl').animate({ left: "0" }, 10000, hidel);
            }

            function hidel() {
                $('#sldl').css('left', '1000px');
                $('#sldr').show();
                rgt();
            }


        });
    </script>
    <style type="text/css">


    </style>
</head>
<body>
    <form id="form1" runat="server">
     <div>
        <img id="sldl" src="../Images/animated%20images/birds/fuglan.gif" style="position:absolute; right:0px" />
         <img id="sldr" src="../Images/animated%20images/birds/rightfuglan.gif" style="position:absolute" />
      </div>
    </form>
</body>`enter code here`