在cocos里面调用sdk页面时，如果在ios8.0上，切换sdk和cocos页面可能会引起opengl卡死，问题截图如下：

解决办法：

参考，里面的3.1有提示

在RootViewController里面添加如下语句，用于在切换时停止cocos特效

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];

    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0 && [[[UIDevice currentDevice] systemVersion] floatValue] < 9.0)
    {
        cocos2d::Director::getInstance()->stopAnimation();
    }
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0 && [[[UIDevice currentDevice] systemVersion] floatValue] < 9.0)
    {
        cocos2d::Director::getInstance()->startAnimation();
    }
}