AddEventListener Mraid

Question

嘿，我有点晚了，但我的代码有点问题。

function Orientation()
{


if ( (window.orientation == 0) || (window.orientation == 180) )//portrait
    {

        Paysage.style.visibility = "hidden";
        Portrait.style.visibility = "visible";
        mraid.removeEventListener("stateChange", mraidIsReady);
        mraid.removeEventListener("orientationchange", mraidIsReady);
        mraid.addEventListener("orientationchange", Orientation);  
        mraid.addEventListener("stateChange", Orientation);
        //var video = document.getElementById("video");
        //video.pause();

    }
if ( (window.orientation == 90) || (window.orientation == -90) )//paysages
  {
        Portrait.style.visibility = "hidden";
        Paysage.style.visibility = "visible";
        mraid.removeEventListener("stateChange", mraidIsReady);
        mraid.removeEventListener("orientationchange", mraidIsReady);
        mraid.addEventListener("orientationchange", Orientation);  
        mraid.addEventListener("stateChange", Orientation);
        //var video = document.getElementById("video");
        //video.play();
    //overlayObj.style.visibility = "";
    //var video = document.getElementById("video");
    //video.play(); 
  }
}

function doReadyCheck()
{   
    if (mraid.getState() == 'loading') 
    {   
        mraid.addEventListener("orientationchange", Orientation);  
        mraid.addEventListener("stateChange", Orientation);  
    } 
    else
    {   
        mraid.addEventListener("orientationchange", Orientation);  
        mraid.addEventListener("stateChange", Orientation);         
    }
}
doReadyCheck(); 
</script>

我的EvetListener总是在加载时工作，但在加载之后就不能工作了.

顺便说一句，我有一个在IOS上工作的代码来阻止景观中的定向，但是它不能在Android上工作，为什么？

谢谢！:)

Answer 1

我注意到您的代码很少有问题。

1. 确保您的第一行代码是<script src="mraid.js"></script>，很可能是因为您没有在脚本标记中粘贴整个代码。
2. 第二，检查mraid是否仍在加载，如果仍在加载，则侦听mraid“就绪”事件。在read事件回调处理程序中，添加其他列表或任何您想要做的与mraid相关的操作。
3. 第三，当您正在添加事件列表并使用某些回调方法时，但是在删除时您正在删除不同的回调处理程序，例如，如果您添加了这个listner mraid.addEventListener("orientationchange", Orientation);，那么在删除时您应该调用mraid.removeEventListener("orientationchange", Orientation);而不是mraid.removeEventListener("orientationchange", mraidIsReady);。
4. 第四，您不需要在每个状态变化时调用不需要的定向处理程序，只听方位变化。
5. 第五，并非所有mraid投诉SDK的支持方向更改，如果Ad不支持该更改事件，那么请听 Window.addEventListener(方向变化，取向)；

这是代码

<script src="mraid.js"></script>
function Orientation()
{


    if ( (window.orientation == 0) || (window.orientation == 180) )//portrait
    {

        Paysage.style.visibility = "hidden";
        Portrait.style.visibility = "visible";


    }
    if ( (window.orientation == 90) || (window.orientation == -90) )//paysages
    {
        Portrait.style.visibility = "hidden";
        Paysage.style.visibility = "visible";        
    }
}

function doReadyCheck()
{
    if (mraid.getState() == 'loading')
    {
        //Mraid is still loading so listen to ready state change
        mraid.addEventListener("ready", mraidIsReady);

    }
    else
    {
        //Mraid is already ready so do your mraid related stuff here

        //orientationchange event will only be added in case your SDK supports    orientationchange otherwise add
        //window.addEventListener("orientationchange", Orientation);
        mraid.addEventListener("orientationchange", Orientation);
        //This is not needed,why do you need to listen to stateChange as well, but its upto you if you want to do that
        //mraid.addEventListener("stateChange", Orientation);
    }
}
/**
* Mraid is ready, so add your mraid related code here
*/
function mraidIsReady(){
    //Remove the ready listener
    mraid.removeEventListener("ready", mraidIsReady);

    //Now add mraid related listeners
    //orientationchange even will only be added in case your SDK supports orientationchange otherwise add       //window.addEventListener("orientationchange", Orientation);
    mraid.addEventListener("orientationchange", Orientation);

    //I don't know if you really need to do that this is un-necessary, so   every stateChange will trigger orientation check
    //mraid.addEventListener("stateChange", Orientation);
}
doReadyCheck();