现在，我已经按照本教程进行操作：
http://iphonedevelopment.blogspot.com/2009/05/opengl-es-from-ground-up-part-6_25.html
如果我尝试释放 UIImage，它不起作用：我会得到一个“EXC_BAD_ACCESS”。现在，我将 UIImage 设为实例变量并保留它们。我不让它自动释放。但问题是有时我想删除我的纹理。我需要释放那些 UIImage 否则我会泄漏。（Performance Tool Leaks 报告说 UIImage 会导致泄漏）但是如果我释放 UIImage，我会得到 EXC_BAD_ACCESS。而且我什至根本没有在任何地方绘制它们或访问它们。该程序只是在它发布的地方崩溃：
#0 0x30011940 in objc_msgSend ()
#1 0x302395f4 in CFGetTypeID ()
#2 0x308f480c in -[UIImage(UIImageDeprecated) imageRef] ()
#3 0x308f4ae0 in SharedIdentifierForImage ()
#4 0x308f4a30 in _UISharedImageDealloc ()
#5 0x308f4964 in -[UIImage dealloc] ()
#6 0x30236b78 in -[NSObject release] ()
#7 0x0000a374 in -[Texture dealloc] (self=0x184b30, _cmd=0x300f7fd0) at /Users/akaraphan/Desktop/Competition/TrapRoom/Classes/Texture.m:329
#8 0x30236b78 in -[NSObject release] ()
#9 0x30235f24 in CFRelease ()
#10 0x302043bc in __CFTypeCollectionRelease ()
#11 0x30205dac in __CFArrayReleaseValues ()
#12 0x30205c18 in __CFArrayDeallocate ()
#13 0x30236020 in _CFRelease ()
#14 0x30235efe in CFRelease ()
#15 0x3054836a in -[NSCFArray release] ()
#16 0x00011658 in -[GameSprite dealloc] (self=0x1838d0, _cmd=0x300f7fd0) at /Users/akaraphan/Desktop/Competition/TrapRoom/Classes/GameSprite.m:40
...
...
Texture.m 中的第 329 行是我发布 UIImage 的地方。
我的代码与教程有点不同，但它的工作方式应该非常相似：
- (id) initFromImage: (NSString*)imageFile{
if (self = [super init]){
path = [[NSBundle mainBundle] pathForResource:imageFile ofType:@"png"];
texData = [[NSData alloc] initWithContentsOfFile:path];
img = [[UIImage alloc] initWithData:texData];
CGImageRef image = img.CGImage;
width = CGImageGetWidth(image);
height = CGImageGetHeight(image);
if (image){
int tempWidth = (int)width, tempHeight = (int)height;
if ((tempWidth & (tempWidth - 1)) != 0 ){
NSLog(@"CAUTION! width is not power of 2. width == %d", tempWidth);
}else if ((tempHeight & (tempHeight - 1)) != 0 ){
NSLog(@"CAUTION! height is not power of 2. height == %d", tempHeight);
}else{
GLubyte *spriteData = (GLubyte*) calloc(width * 4, height * 4);
CGContextRef spriteContext = CGBitmapContextCreate(spriteData, width, height, 8, width*4, CGImageGetColorSpace(image), kCGImageAlphaPremultipliedLast);
CGContextDrawImage(spriteContext, CGRectMake(0.0, 0.0, width, height), image);
CGContextRelease(spriteContext);
glGenTextures(1, &GLtexture);
glBindTexture(GL_TEXTURE_2D, GLtexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, spriteData);
free(spriteData);
CGImageRelease(image);
NSLog(@"Texture %d", GLtexture);
}
}else NSLog(@"ERROR: Image not loaded...");
return self;
}
return nil;
}
如果你能看出什么是错的，请指导我。谢谢你。