我刚开始使用 EaselJS,我遇到了我的第一个障碍。我扩展了 Container 对象以创建一个名为 Egg 的新类:
(function() {
var Egg = function(color, x, y, cY) {
this.initialize(color, x, y, cY);
}
var e = Egg.prototype = new createjs.Container(); // inherit from Container
e.Container_initialize = e.initialize;
e.initialize = function(color, x, y, cY) {
this.Container_initialize();
this.circle = new createjs.Shape();
this.circle.graphics.beginFill(color).drawCircle(0, 0, 10);
this.circle.x = x;
this.circle.y = y;
this.addChild(this.circle);
this.changeY = cY;
this.addEventListener("tick", this.handleTick);
}
e.handleTick = function(event) {
console.log(event.delta); // undefined!
}
window.Egg = Egg;
}());
我正在这样初始化:
var stage, timeCircle;
function init() {
stage = new createjs.Stage("gameCanvas");
timeCircle = new createjs.Shape();
createjs.Ticker.useRAF = true;
createjs.Ticker.setFPS(30);
createjs.Ticker.addEventListener("tick", tick);
var egg = new Egg("red", 50, 50, 100);
stage.addChild(egg);
var egg2 = new Egg("blue", 100, 50, 50);
stage.addChild(egg2);
}
function tick(event) {
stage.update(event);
}
在 Egg 的 handleTick 函数中,当我注销 event.delta 属性时,我得到“未定义”。我想如果我通过 stage.update 调用传入事件,那么它会传播到舞台上的对象吗?