最近有個需求，要在網站中播放一段介紹性的視頻，于是做了一個用Flex播放視頻的demo。播放視頻的代碼是以前在網上找的，但是從html頁面獲得視頻地址的時候參數傳遞問題浪費了很多時間，現整理總結如下：

在Flex中接收參數很簡單，通過FlexGlobals.topLevelApplication.parameters或直接用parameters，文檔中對parameters的介紹如下：

spark.components.Application.parameters():Object [只讀] 包含表示提供給此 Application 的參數的名稱-值對的 Object。 可以使用 for-in 循環來提取 parameters Object 中的所有名稱和值。 參數有兩個源：Application 的 URL 中的查詢字符串和 FlashVars HTML 參數（僅適用于主 Application）的值。

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接收參數代碼：

[javascript] view plaincopyprint?

privatefunction init():void?

{?

??? if (parameters != null) {?

??????? var source:String = parameters.source as String;?

??????? var param2:String = parameters.test as String;?

??? }?

}?

private function init():void{if (parameters != null) {var source:String = parameters.source as String;var param2:String = parameters.test as String;}}

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??????? parameters 參數有兩個來源Url和FlashVars，分別介紹如下：

新建一個Flex應用程序時會同時新建一個html頁面，Flex應用是嵌入到html中的。其中包括javascript和<noscript>標簽兩部分，只有當瀏覽器不支持javascript時才會執行<noscript>中的代碼。

??????? 1.通過url傳遞參數

這種方式和html url傳參一樣，swf?param1=param1&param2=param2代碼如下：

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swfobject.embedSWF(?

??????????????? "VideoPlayer.swf?source=http://material.157you.com/material/767/dcf_enc.flv&param2=test", "flashContent",??

??????????????? "500", "500",??

??????????????? swfVersionStr, xiSwfUrlStr,??

??????????????? flashvars, params, attributes);?

swfobject.embedSWF("VideoPlayer.swf?source=http://material.157you.com/material/767/dcf_enc.flv&param2=test", "flashContent", "500", "500", swfVersionStr, xiSwfUrlStr, flashvars, params, attributes); [html] view plaincopyprint?

<noscript>?

??? <objectclassid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"width="500"height="500"id="VideoPlayer">?

????? <paramname="movie"value="VideoPlayer.swf?source=http://material.157you.com/material/767/dcf_enc.flv"/>?

????? ......?

????? <!--[if !IE]>-->?

????? <objecttype="application/x-shockwave-flash"data="VideoPlayer.swf?source=http://material.157you.com/material/767/dcf_enc.flv&param2=test "width="500"height="500">?

???????? .......?

????? <!--<![endif]-->?

????? ......?

??? </object>?

<noscript>?

<noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="500" height="500" id="VideoPlayer"><param name="movie" value="VideoPlayer.swf?source=http://material.157you.com/material/767/dcf_enc.flv" />......<!--[if !IE]>--><object type="application/x-shockwave-flash" data="VideoPlayer.swf?source=http://material.157you.com/material/767/dcf_enc.flv&param2=test " width="500" height="500">.......<!--<![endif]-->......</object> <noscript>

??????? 2.通過FlashVars傳遞參數

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[javascript] view plaincopyprint?

var flashvars = {};?

flashvars.source = "http://material.157you.com/material/767/dcf_enc.flv";?

flashvars.param2 = "test";?

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swfobject.embedSWF(?

??? "VideoPlayer.swf", "flashContent",??

??? "500", "500",??

??? swfVersionStr, xiSwfUrlStr,??

??? flashvars, params, attributes);?

var flashvars = {};flashvars.source = "http://material.157you.com/material/767/dcf_enc.flv";flashvars.param2 = "test";swfobject.embedSWF("VideoPlayer.swf", "flashContent", "500", "500", swfVersionStr, xiSwfUrlStr, flashvars, params, attributes); [html] view plaincopyprint?

<noscript>?

??? <objectclassid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"width="500"height="500"id="VideoPlayer">?

??????? <paramname="movie"value="VideoPlayer.swf"/>?

??????? <paramname="flashvars"value="source=http://material.157you.com/material/767/dcf_enc.flv&param2=test"/>?

???? ......?

??????? <!--[if !IE]>-->?

??????? <objecttype="application/x-shockwave-flash"data="VideoPlayer.swf"width="500"height="500">?

??????????? <paramname="flashvars"value="source=http://material.157you.com/material/767/dcf_enc.flv&param2=test"/>?

??????????? ......?

??????? <!--<![endif]-->?

??????? ......?

??? </object>?

<noscript>?

<noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="500" height="500" id="VideoPlayer"><param name="movie" value="VideoPlayer.swf" /><param name="flashvars" value="source=http://material.157you.com/material/767/dcf_enc.flv&param2=test" />......<!--[if !IE]>--><object type="application/x-shockwave-flash" data="VideoPlayer.swf" width="500" height="500"><param name="flashvars" value="source=http://material.157you.com/material/767/dcf_enc.flv&param2=test" />......<!--<![endif]-->......</object> <noscript>

注意：當同時使用url和flashvars傳參時，如果參數名相同則flashvars的值會覆蓋url的值

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??????? 以上是通過Flex提供的專門傳遞參數的方式實現的，還有一種方式也可以實現參數傳遞，我們知道在Flex中可以調用JS的方法，所以可以在JS中寫一個方法，返回值為要傳遞的參數，這樣在Flex中就可以獲取到了，這算是曲線救國的一種方法。

JS方法，返回參數params：

[javascript] view plaincopyprint?

function flexParams() {?

??? var params = {param2:'test'};?

??? params.source = "http://material.157you.com/material/767/dcf_enc.flv";?

?

??? return params;?

}?

function flexParams() {var params = {param2:'test'};params.source = "http://material.157you.com/material/767/dcf_enc.flv";return params;}

Flex中調用JS方法，獲得參數：

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privatefunction init():void?

{?

??? var params:Object = ExternalInterface.call("flexParams");?

?????

??? if (params != null) {?

??????? var source:String = params.source as String;?

??????? var param2:String = params.param2 as String;?

??? }?

}?

private function init():void{var params:Object = ExternalInterface.call("flexParams");if (params != null) {var source:String = params.source as String;var param2:String = params.param2 as String;}}

轉載于:https://www.cnblogs.com/regalys168/p/3627748.html

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