iOS 内存警告破坏 EAGLView

Question

当我收到 1 级内存警告时，我的 EAGLView 开始吐出几行 openGL 错误（502 和 506），并且应用程序没有崩溃，但 EAGLView 变得无响应。由于 Cocos2d Director 调用 draw，错误正在发送。

这是内存警告回调的样子：

- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
    [[CCDirector sharedDirector] purgeCachedData];
}

1. 502 和 506 错误是什么意思，以及 2. 内存警告是否会对 opengl 视图产生任何影响，或者它是否会在我的代码中释放不应该出现的内容？

[更新]

设法从 cocos2d 中得到一些详细的日志：

Received memory warning. Level=1
cocos2d: deallocing <CCSprite = 002657B0 | Rect = (0.00,0.00,32.00,32.00) | tag = -1 | atlasIndex = -1>
cocos2d: deallocing <CCTexture2D = 00265EA0 | Name = 4 | Dimensions = 32x32 | Coordinates = (1.00, 1.00)>
cocos2d: deallocing <CCSprite = 00265A70 | Rect = (0.00,0.00,32.00,32.00) | tag = -1 | atlasIndex = -1>
cocos2d: deallocing <CCSprite = 00266050 | Rect = (0.00,0.00,32.00,32.00) | tag = -1 | atlasIndex = -1>
cocos2d: deallocing <LineNode = 0027A630 | Tag = -1>
cocos2d: deallocing <LineNode = 0027AB90 | Tag = -1>
cocos2d: deallocing <LineNode = 0027AF50 | Tag = -1>
cocos2d: deallocing <LineNode = 0027B270 | Tag = -1>
cocos2d: deallocing <LineNode = 00204820 | Tag = -1>
cocos2d: deallocing <PaintingView = 00264970 | Tag = -1>
cocos2d: deallocing <TutorialView = 00266570 | Tag = -1>
cocos2d: deallocing <CCRenderTexture = 00266660 | Tag = -1>
cocos2d: deallocing <CCTexture2D = 00266750 | Name = 5 | Dimensions = 1024x1024 | Coordinates = (1.00, 0.75)>
cocos2d: deallocing <CCSprite = 00266960 | Rect = (0.00,0.00,1024.00,768.00) | tag = -1 | atlasIndex = -1>
cocos2d: deallocing <EAGLView: 0x24aee0; frame = (0 0; 1024 768); transform = [0, -1, 1, 0, 0, 0]; autoresize = RM+BM; layer = <CAEAGLLayer: 0x2492c0>>
cocos2d: deallocing <ES1Renderer = 0024D0E0 | size = 768x1024>
modifying layer that is being finalized - 0x2fab80

所以这几乎就是一切。看起来除了场景节点之外的所有东西都在消失。

Answer 1

至于 OpenGL 错误是什么意思，您可以参考您的 OpenGL 标头，它会告诉您 502 是 GL_INVALID_OPERATION 而 506 是 GL_INVALID_FRAMEBUFFER_OPERATION。

我从您的问题或提供的代码中看不到任何内容，但我假设您正在过早释放帧缓冲区（您可能不应该在运行时这样做），或者 Cocos2D 在您调用时释放帧缓冲区purgeCachedData（我有点怀疑后者）并且未能完全重新创建它（如果有的话）。您可能需要检查 EAGLView 的实现，并查看它是否已设置为在需要时处理重新创建帧缓冲区（并查看您是否在某个地方不必要地释放了帧缓冲区）。

也就是说，如果您收到内存警告，您可能还需要解决这些问题的根源。