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我從http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animatingRequestanimationframe使用率問題
得到了以下RequestAnimationframe功能我想使用它。但不知道如何調用它並使用它。有人可以給我一個簡單的例子。我是新來這個HTML5動畫的事情,所以你可以理解..
我將非常感謝所有幫助!功能如下..
(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelRequestAnimationFrame = window[vendors[x]+
'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
if (!window.cancelAnimationFrame)
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}())
沒錯沒錯!非常感謝Loktar。你做了一個完美的例子,我聽不懂:)我已經打上你的答案是正確的:) – user1655003