Question

代码如下，但我得到“ytplayer未定义”错误。这是

的问题

<script src="http://www.google.com/jsapi"></script>
<script>
  google.load("swfobject", "2.1");
</script>

<script type="text/javascript">

        function updateHTML(elmId, value) {
          document.getElementById(elmId).innerHTML = value;
        }

        function setytplayerState(newState) {
          updateHTML("playerstate", newState);
        }

        function onYouTubePlayerReady(playerId) {
          ytplayer = document.getElementById("myytplayer");
          ytplayer.addEventListener("onStateChange", "onytplayerStateChange");
          ytplayer.addEventListener("onError", "onPlayerError");
        }

        function onytplayerStateChange(newState) {
          setytplayerState(newState);
        }

        function onPlayerError(errorCode) {
          alert("An error occured: " + errorCode);
        }

        // functions for the api calls
        function loadNewVideo(id, startSeconds) {
          if (ytplayer) {
            ytplayer.loadVideoById(id, parseInt(startSeconds));
          }
        }

        function play() {
          if (ytplayer) {
            ytplayer.playVideo();
          }
        }


    </script>

并将其插入此处

<div id="ytapiplayer">

</div>
<script type="text/javascript">
      // <![CDATA[

      // allowScriptAccess must be set to allow the Javascript from one 
      // domain to access the swf on the youtube domain
      var params = { allowScriptAccess: "always", wmode: "transparent", menu: "false"  };
      // this sets the id of the object or embed tag to 'myytplayer'.
      // You then use this id to access the swf and make calls to the player's API
      var atts = { id: "myytplayer" };
      swfobject.embedSWF("http://www.youtube.com/apiplayer?enablejsapi=1&playerapiid=ytplayer", 
                         "ytapiplayer", "100%", "100%", "8", null, null, params, atts);
      loadNewVideo('11mrMppgfrQ','0');
      play();
//]]>
    </script>

onYouTubePlayerReady正常工作，此函数中的alert(ytplayer);返回一个对象，但在loadNewVideo中调用alert(ytplayer);会返回null。

这是直接从http://code.google.com/apis/youtube/chromeless_example_1.html复制的，它可以正常工作。我出错的任何想法？是否在对象上调用getElementById？

Answer 1

发现问题。

loadNewVideo('11mrMppgfrQ','0');
      play();

之前正在调用

function onYouTubePlayerReady(playerId) {
      ytplayer = document.getElementById("myytplayer");
      ytplayer.addEventListener("onStateChange", "onytplayerStateChange");
      ytplayer.addEventListener("onError", "onPlayerError");
    }

在函数内将它们移到此行之后

ytplayer = document.getElementById("myytplayer");

解决了问题

最终代码如下所示：

function onYouTubePlayerReady(playerId) { 
    ytplayer = document.getElementById("myytplayer");
    ytplayer.addEventListener("onStateChange", "onytplayerStateChange"); 
    ytplayer.addEventListener("onError", "onPlayerError"); 
    loadNewVideo('11mrMppgfrQ','0'); 
    play(); 
}

使用SWFObject方法在网站上包含无边框Youtube视频时，“ytplayer未定义”

1 个答案: