（1）写程序时最好在类的init函数中显示类名，表明现在在执行哪个类，样例代码

CCLOG(@"cocos2d: Using Director Type:%@", [self class]);

（2）最好在类中添加一个描述该类相关信息的函数，样例代码：

- (NSString*) description{	return [NSString stringWithFormat:@"<%@ = %p | Size: %0.f x %0.f, view = %@>", [self class], self, winSizeInPoints_.width, winSizeInPoints_.height, view_];}

（3）在每个函数中添加一个描述函数名有关的信息，样例代码：

CCLOG(@"%@: Using Method Type:%@", [self class],[self _cmd]);

　(4) 对某些值可以加上断言

NSAssert(_sharedDirector == nil, @"Attempted to allocate a second instance of a singleton.");

　（5）要善于运用条件编译，去调试代码

#ifdef DEBUG	// If we are debugging our code    ............................#endif