精仿iPhone手机解锁效果，拖动按钮滑动切换显示图片，也就是通过拖动按钮图片切换显示功能。
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<title>仿iPhone手机滑动解锁效果_武鸣人</title>
<style type="text/css">
#iphone{position:relative;width:426px;height:640px;margin:10px auto;background:url(/img/20240305_www_wuming_ren_21.jpg) no-repeat;}
#lock{position:absolute;left:50%;bottom:33px;width:358px;height:62px;margin-left:-179px;}
#lock span{position:absolute;width:93px;height:62px;cursor:pointer;background:url(/img/20240305_www_wuming_ren_22.jpg) no-repeat;}
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window.onload = function ()
{//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
var iPhone = document.getElementById("iphone");
var oLock = document.getElementById("lock");
var oBtn = oLock.getElementsByTagName("span")[0];
var disX = 0;
var maxL = oLock.clientWidth - oBtn.offsetWidth;
var oBg = document.createElement("img");
oBg.src = "/img/20240305_www_wuming_ren_23.jpg";//预加载下第二张背景，其它没什么大用。
oBtn.onmousedown = function (e)
{
var e = e || window.event;
disX = e.clientX - this.offsetLeft;
document.onmousemove = function (e)
{
var e = e || window.event;
var l = e.clientX - disX;
l < 0 && (l = 0);
l > maxL && (l = maxL);
oBtn.style.left = l + "px";
oBtn.offsetLeft == maxL && (iPhone.style.background = "url("+ oBg.src +")", oLock.style.display = "none");
return false;
};
document.onmouseup = function ()
{
document.onmousemove = null;
document.onmouseup = null;
oBtn.releaseCapture && oBtn.releaseCapture();
oBtn.offsetLeft > maxL / 2 ?
startMove(maxL, function ()
{
iPhone.style.background = "url("+ oBg.src +")";
oLock.style.display = "none"
}) :
startMove(0)
};
this.setCapture && this.setCapture();
return false
};
function startMove (iTarget, onEnd)
{
clearInterval(oBtn.timer);
oBtn.timer = setInterval(function ()
{
doMove(iTarget, onEnd)
}, 30)
}
function doMove (iTarget, onEnd)
{
var iSpeed = (iTarget - oBtn.offsetLeft) / 5;
iSpeed = iSpeed > 0 ? Math.ceil(iSpeed) : Math.floor(iSpeed);
iTarget == oBtn.offsetLeft ? (clearInterval(oBtn.timer), onEnd && onEnd()) : oBtn.style.left = iSpeed + oBtn.offsetLeft + "px"
}
};//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
</script>
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<body>
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<div id="iphone">
<div id="lock"><span></span></div>
</div>
</body>
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