获取返回随机值的函数的当前值 [英] Get the current value of a function which returns random values

问题描述

我要做的是获取当前正在播放的youtube视频的当前视频ID，并将其显示在div中.

The thing I am trying to do is to get the current video Id of the youtube videos that are currently playing and display it in a div.

这是我的YT iframe API代码(例如在Google开发者网站上的基本示例中):

This is my YT iframe API code (like in the basic example on the google dev site):

  var player;
  function onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
      height: '390',
      width: '640',
      videoId: currentVideoId,
      events: {
        'onReady': onPlayerReady,
        'onStateChange': onPlayerStateChange,
        'onError': onError,
      },

    });
  }

如您所见，VideoId(它将播放的第一个视频)由一个名为"currentVideoId"的变量设置，该变量的设置如下:

as you can see, the VideoId (the first video it will play) is set by a variable called "currentVideoId", which was set before like this:

var currentVideoId = '9z4Kft47kBM'

我想在div中显示当前ID

I want to display the current ID in a div

<div id="currentVideoDiv"></div>

为此，我使用了以下代码:

To do this i used this code:

$('#currentVideoDiv').html('Currently Playing:' + currentVideoId);

到目前为止，它可以正确显示我的第一个videoID.

so far so good, it shows my first videoID correctly.

现在，在第一个视频结束后，onStateChange事件将调用此函数:

Now after the first video has ended, the onStateChange event will call this function:

function onPlayerStateChange(event) {
 if(event.data === 0) {             
     swapVideo();      
        }
  }

"swapVideo"函数将调用函数getId();

The "swapVideo" function will call the function getId();

 function swapVideo() {   

 player.stopVideo();
 player.loadVideoById(getId()); 
 }

getId()函数将从xml文件中获取随机的videoID，不必为此担心.

The getId() function will get a random videoID from an xml file, don´t worry about that in detail.

 function getId() {
 return videos[Math.floor(Math.random() * videos.length)];


}

因此现在正在播放具有新videoId的新视频，但是currentVideoDiv中的值仍然相同，因为没有任何更改.

So now a new video with a new videoId is playing, but the value in the currentVideoDiv is still the same since nothing did change it.

问题是，如何获取由getId函数随机设置的新的当前ID，并将其显示在currentVideoDiv中?

The question is, how can i get the new current id, which was set randomly by the getId function and display it in the currentVideoDiv?

推荐答案

这是基于您在loadVideoById

function swapVideo() {

 var currentVideoId = getId();

 player.stopVideo();
 player.loadVideoById(currentVideoId); 

 $('#currentVideoDiv').html('Currently Playing:' + currentVideoId);

}

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