Applied tween inside each(), how do I use reverse()?

问题

Let's suppose I apply a tween to each element on my canvas

elements.each(function (element) {
    new Kinetic.Tween({
        node: element,
        rotationDeg: 180
    }).play();
});

All items have been tweened and have passed from their original state to a final state. My question is: How would I apply a reverse() to revert each item to their original state?

回答1:

Store the tweens inside an array, and then loop through that array and use .reverse()

    elements = stage.get('Rect');
    var tweenArray = [];

    // reverse tween
    document.getElementById('reverse').addEventListener('click', function () {
        for (var i=0; i<tweenArray.length; i++) {
            tweenArray[i].reverse();
        }
    }, false);

    // play tween forward
    document.getElementById('play').addEventListener('click', function () {
        elements.each(function (element) {
            var tween = new Kinetic.Tween({
                node: element,
                rotationDeg: 180
            }).play();
            tweenArray.push(tween);
        });
    }, false);

jsfiddle

来源：https://stackoverflow.com/questions/17931871/applied-tween-inside-each-how-do-i-use-reverse