CreateJS錯誤：無法分配qContainer

Question

我試圖使用元素的數組中的一個函數來只讀屬性「tweenjs_count」，我得到這個錯誤

Uncaught TypeError: Cannot assign to read only property 'tweenjs_count' of qContainer.

function handleKeyDown(e) 
{ 
if (!e) { 
    var e = window.event; 
} 
    if (e.keyCode=='1'.charCodeAt(0)) { 

     var imagearray = ["qContainer", "milkContainer"]; 
     imagearray.forEach(function(element) { 
     jumpElemets(element); 
    }); 
    jumpElemets(imagearray); 
    } 

    } 
    function jumpElemets(element) { 
    createjs.Tween.get(element, {loop: false}) 
     .to({alpha: 0 ,y: element.y +10}, 200, createjs.Ease.getPowInOut(2)) 
     .to({alpha: 1, y: element.y -10}, 200, createjs.Ease.getPowInOut(2)) 
     .to({alpha: 0,y: element.y }, 100, createjs.Ease.getPowInOut(2)) 
     .to({alpha: 1}, 100, createjs.Ease.getPowInOut(2)); 

} 

Answer 1

你不能叫jumpElemets(imagearray);。這是因爲createJS Tween需要一個元素，並且您正在向它發送一個元素數組。

此外，似乎沒有用於該行。我想借此行了完全

function handleKeyDown(e) 
{ 
    if (!e) { 
    var e = window.event; 
    } 
    if (e.keyCode=='1'.charCodeAt(0)) { 
     var imagearray = [qContainer, milkContainer]; 
     imagearray.forEach(function(element) { 
      jumpElemets(element); 
     }); 
    } 
} 

function jumpElemets(element) { 
createjs.Tween.get(element, {loop: false}) 
    .to({alpha: 0 ,y: element.y +10}, 200, createjs.Ease.getPowInOut(2)) 
    .to({alpha: 1, y: element.y -10}, 200, createjs.Ease.getPowInOut(2)) 
    .to({alpha: 0,y: element.y }, 100, createjs.Ease.getPowInOut(2)) 
    .to({alpha: 1}, 100, createjs.Ease.getPowInOut(2)); 

} 

從CreateJS文檔

target Object The target object that will have its properties tweened.

不是數組

http://www.createjs.com/docs/tweenjs/classes/Tween.html