我刚开始使用EaselJS,我正在遇到我的第一个障碍。我已经扩展了Container对象来创建一个名为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;
}());
我是这样初始化的:
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 handleTick函数中,当我注销event.delta属性时,我会得到"undefined"。我想,如果我通过stage.update调用传入事件,那么它会传播到stage上的对象吗?
Ticker
的刻度事件与DisplayObject
(或Stage
)的刻度事件略有不同。请参见此处:http://www.createjs.com/Docs/EaselJS/classes/DisplayObject.html#event_tick
因此,在您的情况下,这可能会起作用:
e.handleTick = function(event) {
console.log(event.params[0].delta);
//params is all the parameter that you use in stage.update(p1, p2, ...);
}