上一篇中只介绍AppDelegate中applicationDidFinishLaunching()函数,这个函数是程序运行的关键,在CCApplicationProtocol中声明纯虚函数,在CCApplication中进行调用。在CCApplicationProtocol中与applicationDidFinishLaunching()类似的纯虚函数还有两个,分别是:applicationDidEnterBackground()和applicationWillEnterForeground(),在CCApplicationProtocol中声明如下: 上一篇中只介绍AppDelegate中applicationDidFinishLaun