CCLayer 在 init 中调用 schedual 方法后引用计数混乱的问题
参考相关问题链接：
http://www.cocos2d-iphone.org/forum/topic/314
先上代码再解释：
RefferenceCountLayer.h
2012-08-09 00:41:55.733 WonderPipeEffects1[18926:707] init() -> 1.RefferenceCount = 12012-08-09 00:41:55.737 WonderPipeEffects1[18926:707] init() -> 2.RefferenceCount = 22012-08-09 00:41:55.741 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.748 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.753 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.758 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.769 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.775 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.785 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.788 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.803 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.807 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.818 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.820 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.836 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.839 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.852 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.856 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.869 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.872 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.886 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.889 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.907 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.911 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.917 WonderPipeEffects1[18926:707] ccTouchesBegan()2012-08-09 00:41:55.921 WonderPipeEffects1[18926:707] init() -> 1.RefferenceCount = 12012-08-09 00:41:55.925 WonderPipeEffects1[18926:707] init() -> 2.RefferenceCount = 22012-08-09 00:41:55.928 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 32012-08-09 00:41:55.932 WonderPipeEffects1[18926:707] ReffenceCountLayer.dealloc!2012-08-09 00:41:55.936 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.940 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.944 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.952 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.954 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 42012-08-09 00:41:55.970 WonderPipeEffects1[18926:707] tick() -> RefferenceCount = 42012-08-09 00:41:55.980 WonderPipeEffects1[18926:707] draw() -> RefferenceCount = 4
init 方法里面调用 schedual 方法以后，RefferenceCountLayer 的引用计数会加1，这里没有问题~
但是到了 draw()、tick() 方法里面，引用计数竟然由 2 直接跳到 4!
我是百思不得其解，不过经过我的测试，发现引用计数虽然直接跳到 4 了，
但是在 replaceScene 的时候，依然能够看到 RefferenceCountLayer 的 dealloc 方法被调用了，
也就是说，该对象并不会因此而出现什么内存泄露的问题~
后面我思考了一下，引用计数由 2 跳到 4 肯定是在 cocos2d 框架内部安全的增长到 4 的，
这个不用我们去操心，没有内存泄露，我们知道这样一件事情就行了~
前面附的链接里面 cocos2d 作者之一 Riq 没有就此问题做较为仔细的回复，这是问题的来源，
不过也不能去责怪他什么，人的精力毕竟是有限的，他不可能就每个问题都做详细的回复，
凡事都往好的方面想，Riq 作为 cocos2d 的主要负责人之一，为我们提供了这么 nice 的东西，这样便行了~
