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InitWithCoder中初始化的内存在DrawView中丢失

opengl-es objective-c iphone

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rein · 技术社区 · 16 年前

我有一些在initwithcoder:中初始化的内存。我可以在initwithcoder的“返回自我”部分之前验证内存是否已初始化。

我使用malloc分配内存,并使用自定义函数进行填充:

// in initWithCoder:
fontTexCoords = (GLfloat *)malloc(10 * 8 * sizeof(GLfloat));
[fontInfo textureCoordinatesToArray:fontTexCoords];
NSLog(@"%f", fontTexCoords[0]);  // correctly outputs 1.0

但是,在我的绘图程序中,该内存的内容似乎已归零:

// in drawView
NSLog(@"%f", fontTexCoords[0]); // incorrectly outputs 0.0

在我的应用程序的任何其他地方,我都不会触摸内存。

问题:为什么所有数据都丢失了?initwithcoder和drawview之间的过程是什么,对我的malloc内存有什么奇怪的地方?

编辑:

前8个的输出使用nslog(@“initwitcoder:%@%x%f”,self,fonttexcoords,fonttexcoords[0]在initwitcoder中浮动。到8 )

2009-08-22 21:25:15.220 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.221 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 1.000000
2009-08-22 21:25:15.222 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.223 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.500000
2009-08-22 21:25:15.223 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.500000
2009-08-22 21:25:15.224 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.500000
2009-08-22 21:25:15.224 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.500000
2009-08-22 21:25:15.224 Memory[32706:20b] initWithCoder: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 1.000000

使用nslog(@“drawview:%@%x%f”、self、fonttexcoords、fonttexcoords[0]从drawview输出到8 )

2009-08-22 21:25:15.399 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.399 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.400 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.401 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.403 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.404 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.404 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000
2009-08-22 21:25:15.405 Memory[32706:20b] drawView: <EAGLView: 0xd19060; frame = (0 0; 320 480); autoresize = W+H; layer = <CAEAGLLayer: 0xd1b300>> D53110 0.000000

谢谢

2 回复 | 直到 16 年前

Jason 16 年前

你能把你的nslog呼叫改成包括 self 在输出中?然后确认这两个地方使用的视图相同:

NSLog(@"%@ %f", self, fontTexCoords[0]);

rein 16 年前

发现了问题。那是我的愚蠢。我用错误的方法释放了记忆。不知怎么的,我把免费的(fonttexcoords)放在了layoutview而不是dealloc中。

傻,傻我:)