_bottomBtn = new BottomBtn();//这个对象内部有一个属性为testNum;
this.addChild(_bottomBtn);
trace("测试1 = " + _bottomBtn.testNum + "-" + _bottomBtn);// 测试1 = 1-[object Object]
this.removeChildren();
trace("测试2 = " + _bottomBtn.testNum + "-" + _bottomBtn);// 测试2 = 1-[object Object]
this.destroyChildren();
trace("测试3 = " + _bottomBtn.testNum + "-" + _bottomBtn); // 测试3 = 1-[object Object]
语句后头为打印结果 小白在这求各路大神解释一下
