如何判断闪存已经加载完成？

Question

在我们的网站中，我将一个由flash builder制作的flash嵌入到html中，flash的大小超过2M。由于网络故障，加载闪存可能需要30秒。如何知道flash已被浏览器完全加载？

Answer 1

您可以轮询SWF以获取其PercentLoaded值。

有一种方法可以做到这一点(代码复制自learnswfobject.com)：

function swfLoadEvent(fn){
    //Ensure fn is a valid function
    if(typeof fn !== "function"){ return false; }
    //This timeout ensures we don't try to access PercentLoaded too soon
    var initialTimeout = setTimeout(function (){
        //Ensure Flash Player's PercentLoaded method is available and returns a value
        if(typeof e.ref.PercentLoaded !== "undefined" && e.ref.PercentLoaded()){
            //Set up a timer to periodically check value of PercentLoaded
            var loadCheckInterval = setInterval(function (){
                //Once value == 100 (fully loaded) we can do whatever we want
                if(e.ref.PercentLoaded() === 100){
                    //Execute function
                    fn();
                    //Clear timer
                    clearInterval(loadCheckInterval);
                }
            }, 1500);
        }
    }, 200);
}

//This function is invoked by SWFObject once the <object> has been created
var callback = function (e){

    //Only execute if SWFObject embed was successful
    if(!e.success || !e.ref){ return false; }

    swfLoadEvent(function(){

        //Put your code here
        alert("The SWF has finished loading!");

    });

};

swfobject.embedSWF("movie.swf", "flashcontent", "550", "400", "9", false, false, false, false, callback);

Answer 2

pipwerks回答运行良好。你甚至可以得到更低的值:而不是1500，只有100就可以了。

但我在Firefox上遇到了一些问题。initialTimeout应该是一个timeInterval，而不是超时，因为在FF中，有时第一次调用时你会有未定义的e.ref.PercentLoaded，但下一次调用就可以了。当然，当if为真时，您需要调用clearInterval(InitialTimeout)。

所以你会得到像这样的东西：

    var initialTimeout = setInterval(function (){
     if(typeof e.ref.PercentLoaded !== "undefined" && e.ref.PercentLoaded()){
         clearInterval(initialTimeout);