Boy-oh-boy我讨厌外部接口(interface)。我有一个视频播放器,该视频播放器利用外部接口(interface)来控制Flash对象并允许Flash对象将消息传递给相同的javascript。一时间,它在所有浏览器中都运行良好。然后几天前,在将项目移出开发之前,我去所有的浏览器中进行了测试,发现该应用程序在Internet Explorer 9中损坏。控制台中出现以下错误:
SCRIPT16389: Could not complete the operation due to error 8070000c.
jquery.min.js, line 16 character 29366
我的javascript文件确实很长,但这是重要的部分。我所有的 Action 都包含在我创建的对象中。在我的方法之一中,我有以下几行:
var that = this;
that.stop();
这是由于该方法而被调用的所有方法:
this.stop = function(){
var that = this;
console.log('stop called');
that.pause();
that.seek(0);
that.isPlaying = false;
console.log('stop finished');
};
this.pause = function(){
var that = this;
console.log('pause called');
if(that.player == 'undefined' || that.player == null){
that.player = that.GetMediaObject(that.playerID);
}
that.player.pauseMedia(); //external interface call
that.isPlaying = false;
console.log('pause finished');
};
this.seek = function(seek){
var that = this;
console.log('seek called');
if(that.player == 'undefined' || that.player ==null){
console.log("player="+that.player+". resetting player object");
that.player = that.GetMediaObject(that.playerID);
console.log("player="+that.player);
}
that.player.scrubMedia(seek); //external interface call
console.log('seek finished');
};
//this method returns a reference to my player. This method is call once when the page loads and then again as necessary by all methods that make external interface calls
this.GetMediaObject = function(playerID){
var mediaObj = swfobject.getObjectById(playerID);
console.log('fetching media object: ' +mediaObj );
//if swfobject.getObjectById fails
if(typeof mediaObj == 'undefined' || mediaObj == null){
console.log('secondary fetch required');
var isIE = navigator.userAgent.match(/MSIE/i);
mediaObj = isIE ? window[playerID] : document[playerID];
}
return mediaObj;
};
这是我的console.log语句的输出:
LOG: fetching media object: [object HTMLObjectElement]
LOG: video-obj-1: ready
LOG: stop called
LOG: pause called
LOG: pause finished
LOG: seek called
LOG: player=[object HTMLObjectElement]
SCRIPT16389: Could not complete the operation due to error 8070000c.
jquery.min.js, line 16 character 29366
有趣的是,似乎第一个外部接口(interface)调用“that.player.pauseMedia()”没有任何问题,但是随后对“that.player.scrubMedia(0)”的调用却失败了。另一个奇怪的是,它指向jquery作为错误的来源,但是在这些函数中没有对jquery的调用。
这就是我所不知道的。我的时间不对,这不是问题。当Flash对象已完全加载时,我的 ActionScript 的最后一行将消息发送到javascript。我也将参数“allowScriptAccess”设置为“always”,所以也不是。我们使用的 ActionScript 文件已在以前的项目中使用过,所以我90%确信这不是问题。
无论如何,这是我的 ActionScript 。我没有编写 ActionScript ,并且对这种语言不太熟悉,但是我尝试放入与我的应用程序最相关的部分:
flash.system.Security.allowDomain("*.mydomain.com");
import flash.external.ExternalInterface;
// variables to store local information about the current media
var mediaEmbedServer:String = "www";
var mediaPlayerID:String;
var mediaFile:String;
var mediaDuration:Number;
// variables to be watched by actionscript and message javascript on changes
var mediaPositions:String = "0,0"; // buffer position, scrub position
var mediaStatus:String;
var netStreamClient:Object = new Object();
netStreamClient.onMetaData = metaDataHandler;
netStreamClient.onCuePoint = cuePointHandler;
var connection:NetConnection;
var stream:NetStream;
var media:Video = new Video();
// grab the media's duration when it becomes available
function metaDataHandler(info:Object):void {
mediaDuration = info.duration;
}
function cuePointHandler(info:Object):void {
}
connection = new NetConnection();
connection.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
connection.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
try {
var paramName:String;
var paramValue:String;
var paramObject:Object = LoaderInfo(this.root.loaderInfo).parameters;
for (paramName in paramObject) {
paramValue = String(paramObject[paramName]);
switch (paramName){
case "server":
mediaEmbedServer = paramValue;
break
case "playerID":
mediaPlayerID = paramValue;
break
}
}
} catch (error:Error) {
}
if (mediaEmbedServer == "dev" || mediaEmbedServer == "dev2"){
connection.connect("rtmp://media.developmentMediaServer.com/myApp");
} else {
connection.connect("rtmp://media.myMediaServer.com/myApp");
}
function securityErrorHandler(event:SecurityErrorEvent):void {
trace("securityErrorHandler: " + event);
}
function connectStream():void {
stream = new NetStream(connection);
stream.soundTransform = new SoundTransform(1);
stream.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
stream.client = netStreamClient;
media.attachNetStream(stream);
media.width = 720;
media.height = 405;
addChild(media);
}
function netStatusHandler(stats:NetStatusEvent){
switch (stats.info.code){
case "NetConnection.Connect.Success":
connectStream();
break;
case "NetConnection.Call.BadVersion":
case "NetConnection.Call.Failed":
case "NetConnection.Call.Prohibited":
case "NetConnection.Connect.AppShutdown":
case "NetConnection.Connect.Failed":
case "NetConnection.Connect.InvalidApp":
case "NetConnection.Connect.Rejected":
case "NetGroup.Connect.Failed":
case "NetGroup.Connect.Rejected":
case "NetStream.Connect.Failed":
case "NetStream.Connect.Rejected":
case "NetStream.Failed":
case "NetStream.Play.Failed":
case "NetStream.Play.FileStructureInvalid":
case "NetStream.Play.NoSupportedTrackFound":
case "NetStream.Play.StreamNotFound":
case "NetStream.Seek.Failed":
case "NetStream.Seek.InvalidTime":
// report error status and reset javascriptPlay
clearInterval(progressInterval);
messageStatus("error");
break;
default:
// check time through file to determine if media is over
if (stream.time > 0 && stream.time >= (mediaDuration - .25)){
// reset media if it has ended
clearInterval(progressInterval);
stream.play(mediaFile, 0, 0);
messageStatus("finished");
}
}
};
var progressInterval:Number;
// respond to a play/pause request by playing/pausing the current stream
function pauseMedia(){
clearInterval(progressInterval);
if (mediaStatus == 'playing'){
stream.pause();
messageStatus("paused");
}
};
ExternalInterface.addCallback( "pauseMedia", pauseMedia );
// respond to a scrub request by seeking to a position in the media
function scrubMedia(newPosition){
clearInterval(progressInterval);
if (mediaStatus == "playing"){
stream.pause();
messageStatus("paused");
}
stream.seek(newPosition * mediaDuration);
var positionSeconds = newPosition * mediaDuration;
messagePositions(positionSeconds+","+positionSeconds);
};
ExternalInterface.addCallback( "scrubMedia", scrubMedia );
ExternalInterface.call("MediaPlayerReady", mediaPlayerID);
最佳答案
听起来像undefined expando property,可能是jQuery IE9 bug引起的。调试它的最佳方法是删除userAgent测试,并用对object元素的检查替换它,例如:
document.getElementsByTagName("object")[0].outerHTML
查看jQuery首次单击后ID属性是否已更改。