javascript - 使用 JS 将焦点设置为 swf

Question

如何使用 Javascript 将焦点设置在嵌入页面的 SWF 上？我尝试使用通常的方法，但它似乎不起作用......

Answer 1

There are known issues with focus management and Flash in Firefox, unfortunately.

Here's an article that explains one approach that could work for you, though; the upshot is that you can use JavaScript and flash.external.ExternalInterface to notify the Flash file of keyboard activity until the Flash control gains focus normally. I've implemented an approach like this before and it works just fine; for example, my own solution looked something like this, in the containing HTML page:

<script language="javascript">

    if (navigator.appName.indexOf("Microsoft") != -1)
    {
        document.attachEvent("onkeydown", ieKeyHandler);
        window.attachEvent("onkeydown", ieKeyHandler);

        function ieKeyHandler(event)
        {       
            sendToFlash(event.keyCode);
        }       
    }
    else
    {
        document.onkeydown = function(e)
        {       
            sendToFlash(e.keyCode);
        }
    }

    function sendToFlash(s)
    {       
        var flashCtl = thisMovie("yourFlashObjectID");
        flashCtl.callIntoFlashFromJavascript(s);            
    }

    function thisMovie(movieName)
    {
        if (navigator.appName.indexOf("Microsoft") != -1)           
        {
            return window[movieName];
        }
        else
        {
            return document[movieName];
        }
    }

</script>

... and then in the Flash file, you could simply define an ExternalInterface callback handler for a function called callIntoFlashFromJavascript, and pass the string argument into your text control. It's a bit heavy-handed, admittedly, but it works.

See my answer to this question as well for an end-to-end example of using ExternalInterface with JavaScript. Hope it helps!