现在是计算的时候不会到-500;
它会跳过-500;所以会一直再滚动着..
有什么方法可以计算到整数的?
貌似有Math里的方法可以吗?<!DOCTYPE html>
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=utf8">
<title>无标题文档</title><style type="text/css">
*{margin:0;padding:0;}
ul,li{list-style:none}
.red{ background:red;}
.blue{ background:blue}
.wrap{width:500px;height:300px;overflow:hidden;position:relative;margin:55px auto}
.inner{position:absolute;left:0;top:0;}
.inner li{float:left;width:500px;height:300px;color:#fff}
.orange{ background:orange}
.nav{position:absolute;bottom:5px;right:5px;}
.nav li{float:left;padding:1px 4px;background:orange;border:1px solid #000;margin-right:4px}
.nav .nav_cur{background:#333;color:#fff;}
#box{ position:absolute;top:50px;left:0;z-index:88}
</style><!--<script type="text/javascript" src="jquery-1.6.min.js">
</script>--></head><body>
<div class="box" id="box">sd</div>
<div class="wrap">
<div class="inner" id="inner">
<ul>
<li class="red">1</li>
<li class="blue">2</li>
<li class="red">3</li>
</ul>
</div>
<div class="nav">
<li class="nav_cur">1</li>
<li>2</li>
</div></div><script type="text/javascript">
var timer;
var u=0;
function $(id){
return document.getElementById(id)
}
var i=0;
var cur;
var arr = [0,-500,-1000];
function aa(){
if($("inner").offsetLeft != arr[i+1]){
u += parseInt((arr[i+1] + $("inner").offsetLeft)/20);
console.log(u)
timer = setTimeout(function(){aa()},10)
}
else{
i++;
if(i == 3){
clearInterval(cur)
}
clearTimeout(timer)
}
$("inner").style.left = u+"px";
}
cur = setInterval(function(){
aa()
},2000)
</script>
</body>
</html>
它会跳过-500;所以会一直再滚动着..
有什么方法可以计算到整数的?
貌似有Math里的方法可以吗?<!DOCTYPE html>
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=utf8">
<title>无标题文档</title><style type="text/css">
*{margin:0;padding:0;}
ul,li{list-style:none}
.red{ background:red;}
.blue{ background:blue}
.wrap{width:500px;height:300px;overflow:hidden;position:relative;margin:55px auto}
.inner{position:absolute;left:0;top:0;}
.inner li{float:left;width:500px;height:300px;color:#fff}
.orange{ background:orange}
.nav{position:absolute;bottom:5px;right:5px;}
.nav li{float:left;padding:1px 4px;background:orange;border:1px solid #000;margin-right:4px}
.nav .nav_cur{background:#333;color:#fff;}
#box{ position:absolute;top:50px;left:0;z-index:88}
</style><!--<script type="text/javascript" src="jquery-1.6.min.js">
</script>--></head><body>
<div class="box" id="box">sd</div>
<div class="wrap">
<div class="inner" id="inner">
<ul>
<li class="red">1</li>
<li class="blue">2</li>
<li class="red">3</li>
</ul>
</div>
<div class="nav">
<li class="nav_cur">1</li>
<li>2</li>
</div></div><script type="text/javascript">
var timer;
var u=0;
function $(id){
return document.getElementById(id)
}
var i=0;
var cur;
var arr = [0,-500,-1000];
function aa(){
if($("inner").offsetLeft != arr[i+1]){
u += parseInt((arr[i+1] + $("inner").offsetLeft)/20);
console.log(u)
timer = setTimeout(function(){aa()},10)
}
else{
i++;
if(i == 3){
clearInterval(cur)
}
clearTimeout(timer)
}
$("inner").style.left = u+"px";
}
cur = setInterval(function(){
aa()
},2000)
</script>
</body>
</html>
LOG: left:-25px
LOG: (-500 + -25)/20 += -51
LOG: left:-51px
LOG: (-500 + -51)/20 += -78
LOG: left:-78px
LOG: (-500 + -78)/20 += -106
LOG: left:-106px
LOG: (-500 + -106)/20 += -136
LOG: left:-136px
LOG: (-500 + -136)/20 += -167
LOG: left:-167px
LOG: (-500 + -167)/20 += -200
LOG: left:-200px
LOG: (-500 + -200)/20 += -235
LOG: left:-235px
LOG: (-500 + -235)/20 += -271
LOG: left:-271px
LOG: (-500 + -271)/20 += -309
LOG: left:-309px
LOG: (-500 + -309)/20 += -349
LOG: left:-349px
LOG: (-500 + -349)/20 += -391
LOG: left:-391px
LOG: (-500 + -391)/20 += -435
LOG: left:-435px
LOG: (-500 + -435)/20 += -481
LOG: left:-481px
LOG: (-500 + -481)/20 += -530
LOG: left:-530px
可以直接用吗?
我复制你的代码怎么用不了
document.write(Math.round(0.50) + "<br />")
document.write(Math.round(0.49) + "<br />")
document.write(Math.round(-4.40) + "<br />")
document.write(Math.round(-4.60))</script>注意了:round() 方法可把一个数字舍入为最接近的整数。