一旦两个精灵图片交叠且移动的时候，偶尔会产生闪屏问题：即两个图片相互闪烁，仿佛引擎无法识别哪个是前景哪个是背景
切到CCDirector::setGLDefaultValues() 查看
1 void CCDirector::setGLDefaultValues(void) 2 { 3 // This method SHOULD be called only after openGLView_ was initialized 4 CCAssert(m_pobOpenGLView, "opengl view should not be null"); 5 6 setAlphaBlending(true); 7 setDepthTest(true); 8 setProjection(m_eProjection); 9 10 // set other opengl default values 11 glClearColor(0.0f, 0.0f, 0.0f, 1.0f); 12 13 #if CC_DIRECTOR_FAST_FPS 14 if (! m_pFPSLabel) 15 { 16 m_pFPSLabel = CCLabelTTF::labelWithString("00.0", "Arial", 24); 17 m_pFPSLabel->retain(); 18 } 19 #endif 20 }
发现第七行打开了深度测试，于是在AppDelegate::applicationDidFinishLaunching()中，添加一行：
CCDirector::sharedDirector()->setDepthTest(false);//关闭深度测试
成功解决
补充：还可以添加这行代码
CCDirector::sharedDirector()->setProjection(kCCDirectorProjection2D);//使用2D投影(默认3D)