按Home键切换到后台后会触发libGPUSupportMercury.dylib: gpus_ReturnNotPermittedKillClient导致crash
转自:http://www.eoeandroid.com/thread-251598-1-1.html
好像有很多朋友都碰到过这个问题,即在真机调试时,按hone键返回桌面,再回到app时,app会crash或僵死。同时xcode停留在:
libGPUSupportMercury.dylib`gpus_ReturnNotPermittedKillClient:
0x372fa094: trap
0x372fa096: nop
原因在于AppDelegate.cpp里:
void AppDelegate::applicationDidEnterBackground() { CCDirector::sharedDirector()->pause(); } void AppDelegate::applicationWillEnterForeground() { CCDirector::sharedDirector()->resume(); }
director在app切换至后台时若被pause,它其实并没有真正暂停,而是仍保持着每秒4帧的绘制速率。但在app处于后台时,ios是不允许app调opengl的。这个原因引发了上述问题。
解决方法是:
void AppDelegate::applicationDidEnterBackground() { CCDirector::sharedDirector()->stopAnimation(); } void AppDelegate::applicationWillEnterForeground() { CCDirector::sharedDirector()->startAnimation(); }
stopAnimation()才让director真正暂停下来。
另:播放视频时按home键crash问题:
http://blog.k-res.net/archives/1193.html