Adobe Animate CC Javascript - 每次可见时启动动画
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【中文标题】Adobe Animate CC Javascript - 每次可见时启动动画【英文标题】:Adobe Animate CC Javascript - start animation everytime it becomes visible 【发布时间】:2018-07-23 01:37:24 【问题描述】:我在页面中间有一个 Adobe Animate CC 动画,我想在每次它滚动到视图时从头开始播放 - 无论是向下滚动还是向上滚动 - 基本上是在它进入视图的任何时候。下面的代码(我粘贴在动画的第一帧中)适用于在动画可见后启动动画 - 但如果滚动过去然后向上滚动则不能再次重新启动它......可以修改它以做到这一点?
// stop main timeline
this.stop();
// check timeout handle
var chkTimer;
// only check visibility when scrolling has stopped
function scheduleVisCheck()
clearTimeout(chkTimer);
chkTimer = setTimeout(checkCanvasVis, 250);
// play main timeline when canvas has scrolled (vertically) into view
function checkCanvasVis()
var rect = canvas.getBoundingClientRect();
if (rect.top >= 0 && rect.bottom <= (window.innerHeight || document.documentElement.clientHeight))
window.removeEventListener("scroll", scheduleVisCheck);
exportRoot.play();
// hook event listener to window scrolling
window.addEventListener("scroll", scheduleVisCheck);
// just in case canvas starts already visible
checkCanvasVis();
【问题讨论】:
【参考方案1】:您必须更改算法以使其在滚动时再次运行,然后再返回。 所以试试这个:
var isOnStageFlag:Boolean = false ;
// play main timeline when canvas has scrolled (vertically) into view
function checkCanvasVis()
var rect = canvas.getBoundingClientRect();
if(isOnStageFlag == false) //The rect is still out of view
if (rect.top >= 0 && rect.bottom <= (window.innerHeight || document.documentElement.clientHeight))
//Dont remove this Listener > window.removeEventListener("scroll",scheduleVisCheck);
exportRoot.play();
isOnStageFlag = true ;//Set this flag to prevent above lines to call again
else
if (rect.bottom < 0 || rect.top > (window.innerHeight || document.documentElement.clientHeight)) //You have to recheck this line of code. I wanted to control the animation if goes out of the stage to re activate your first code again
exportRoot.stop();//Make better performance depends on you animation. because the animation is not on the stage any more
isOnStageFlag = false ; //Now get ready for animation to back into stage
我在代码上写下我的描述。 checkCanvasVis 已更改并创建了名为 isOnStageFlag 的新变量。
祝你好运
【讨论】:
感谢您的支持 - 但是您发布的代码是否替换了我拥有的代码的某个部分?还是全部替换,等等? 你必须用我的替换 checkCanvasVis() 函数并将 isOnStageFlag 变量添加到。 抱歉,我无法让您的解决方案发挥作用 - 但感谢您的帮助! 没问题。我的荣幸。【参考方案2】:我收到了一些额外的帮助,我的原始代码修改如下,现在可以根据需要运行...
// stop main timeline
this.stop();
// check timeout handle
var chkTimer;
var inview = false;
// only check visibility when scrolling has stopped
function scheduleVisCheck()
clearTimeout(chkTimer);
chkTimer = setTimeout(checkCanvasVis, 10);
// play main timeline when canvas has scrolled (vertically) into view
function checkCanvasVis()
var rect = canvas.getBoundingClientRect();
if (rect.top >= 0 && rect.top <= (window.innerHeight || document.documentElement.clientHeight) -150 || (rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && rect.bottom > 150) )
if (inview == false) exportRoot.play(0);
inview = true;
else
inview = false;
// hook event listener to window scrolling
window.addEventListener("scroll", scheduleVisCheck);
// just in case canvas starts already visible
checkCanvasVis();
【讨论】:
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