gar*_*uan 19 html css safari webkit
我有一个非常简单的演示工作,它使用Webkit转换和转换来实现'面板'(div)之间的平滑水平滚动.
我想要走这条路线而不是Javascript驱动系统的原因是它适用于iPad和Javascript性能相当差,但css转换和过渡是如丝绸一样平滑.可悲的是,我用我的演示在iPad上闪烁了很多.
你需要safari或iPad才能看到它的实际效果.我从来没有在转换和转换的任何演示中看到过这种情况,所以我希望这是可以修复的.
无论如何这里的代码是为了这个东西....
HTML看起来像这样.
<html>
<head>
<title>Swipe Demo</title>
<link href="test.css" rel="stylesheet" />
<link href="styles.css" rel="stylesheet" />
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="functions.js"></script>
<script type="text/javascript" src="swiping.js"></script>
</head>
<body>
<div id="wrapper">
<div class='panel one'>
<h1>This is panel 1</h1>
</div>
<div class='panel two'>
<h1>This is panel 2</h1>
</div>
<div class='panel three'>
<h1>This is panel 3</h1>
</div>
<div class='panel four'>
<h1>This is panel 4</h1>
</div>
</div>
</body>
</html>
CSS看起来像这样
body,
html
{
padding: 0;
margin: 0;
background: #000;
}
#wrapper
{
width: 10000px;
-webkit-transform: translateX(0px);
}
.panel
{
width: 1024px;
height: 300px;
background: #fff;
display: block;
float: left;
position: relative;
}
而javascript看起来像这样
// Mouse / iPad Touch
var touchSupport = (typeof Touch == "object"),
touchstart = touchSupport ? 'touchstart' : 'mousedown',
touchmove = touchSupport ? 'touchmove' : 'mousemove',
touchend = touchSupport ? 'touchend' : 'mouseup';
$(document).ready(function(){
// set top and left to zero
$("#wrapper").css("top", 0);
$("#wrapper").css("left", 0);
// get total number of panels
var panelTotal;
$(".panel").each(function(){ panelTotal += 1 });
// Touch Start
// ------------------------------------------------------------------------------------------
var touchStartX;
var touchStartY;
var currentX;
var currentY;
var shouldMove = false;
document.addEventListener(touchstart, swipeStart, false);
function swipeStart(event){
touch = realEventType(event);
touchStartX = touch.pageX;
touchStartY = touch.pageY;
var pos = $("#wrapper").position();
currentX = parseInt(pos.left);
currentY = parseInt(pos.top);
shouldMove = true;
}
// Touch Move
// ------------------------------------------------------------------------------------------
var touchMoveX;
var touchMoveY;
var distanceX;
var distanceY;
document.addEventListener(touchmove, swipeMove, false);
function swipeMove(event){
if(shouldMove){
touch = realEventType(event);
event.preventDefault();
touchMoveX = touch.pageX;
touchMoveY = touch.pageY;
distanceX = touchMoveX - touchStartX;
distanceY = touchMoveY - touchStartY;
movePanels(distanceX);
}
}
function movePanels(distance){
newX = currentX + (distance/4);
$("#wrapper").css("left", newX);
}
// Touch End
// ------------------------------------------------------------------------------------------
var cutOff = 100;
var panelIndex = 0;
document.addEventListener(touchend, swipeEnd, false);
function swipeEnd(event){
touch = (touchSupport) ? event.changedTouches[0] : event;
var touchEndX = touch.pageX;
var touchEndY = touch.pageY;
updatePanelIndex(distanceX);
gotToPanel();
shouldMove = false;
}
// -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
function updatePanelIndex(distance){
if(distanceX > cutOff)
panelIndex -= 1;
if(distanceX < (cutOff * -1)){
panelIndex += 1;
}
if(panelIndex < 0){
panelIndex = 0;
}
if(panelIndex >= panelTotal)
panelIndex = panelTotal -1;
console.log(panelIndex);
}
// -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
function gotToPanel(){
var panelPos = getTotalWidthOfElement($(".panel")) * panelIndex * -1;
$("#wrapper").css("-webkit-transition-property", "translateX");
$("#wrapper").css("-webkit-transition-duration", "1s");
$("#wrapper").css("-webkit-transform", "translateX("+panelPos+"px)");
}
});
function realEventType(event){
e = (touchSupport) ? event.targetTouches[0] : event;
return e;
}
Mar*_*her 45
@gargantaun是对的,如果你想要动画的元素大于屏幕,Webkit就会闪烁.但是有一个简单的解决方法.只需添加:
-webkit-backface-visibility: hidden;
元素,你很高兴!
如上所述,最好使用Translate3d,因为硬件加速可以实现更平滑的过渡.
但是,当动画的div大于屏幕时,会引起闪烁.所以,如果你有一个区域,你希望水平转换的屏幕宽度最多为3.5,它应该被分成4个像这样的div
[1] [2] [3] [.5]
所有div都不应超过屏幕高度或宽度.
对于发布此答案的迟到感到抱歉.在我得到一个"热门问题"的通知之前,我完全忘了它.