更新：我找不到导致我使用测试版SDK的问题的原因，当使用最终的SDK时，问题就消失了。我不知道自己做错了什么。抱歉。我想删除它但不能删除。
您好我有以下错误：
malloc： *对象0x2087000的错误：未分配被释放的指针 * 在malloc_error_break中设置断点以进行调试
我不知道那是什么对象。我不知道怎么找到它。任何人都可以向我解释如何（以及在何处）使用malloc_history。我在malloc_error_break中设置了一个断点，但我找不到该地址的对象。从nsmutablearray中删除对象并手动弹出视图控制器后，我收到此消息。如果我注释掉[reviewUpload.images removeObject：self.reviewUploadImg]这一行，它就不会给我错误，但当然这对我来说没什么用。
- (void) removeImage
{
debugLog(@"reviewUploadImg %@", self.reviewUploadImg);
debugLog(@"reviewUpload %@", self.reviewUpload);
debugLog(@"reviewUploadImg thumb %@", self.reviewUploadImg.thumb);
[reviewUpload.images removeObject: self.reviewUploadImg];
[self.navigationController popViewControllerAnimated:TRUE];
}
我试图打印出3个adressess，但它们都不是被释放但未分配的地址。
我从UIImagePickerController添加图片。
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *pickedImage = (UIImage *)[info objectForKey: UIImagePickerControllerEditedImage];
if (!pickedImage)
pickedImage = (UIImage *)[info objectForKey: UIImagePickerControllerOriginalImage];
if (!reviewUpload.images)
reviewUpload.images = [[NSMutableArray alloc] initWithCapacity: 5];
//UIImage *thumbImage = [pickedImage copyResizedImage: CGSizeMake(120, 120)];
UIImage *thumbImage = [pickedImage copyResizedImage:CGSizeMake(120, 120) withPaddingColor: [UIColor lightGrayColor]];
ReviewUploadImage *rui = [[ReviewUploadImage alloc] init];
rui.thumb = thumbImage;
[thumbImage release];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat: @"yyyyMMddHHmmssSS"];
NSDate *date = [NSDate date];
NSString *tmpFileName = [dateFormatter stringFromDate: date];
[dateFormatter release];
NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent: tmpFileName];
NSData *imageData = [[NSData alloc] initWithData: UIImageJPEGRepresentation(pickedImage, 0.90)];
[imageData writeToFile: path atomically: TRUE];
[imageData release];
rui.path = path;
[reviewUpload.images addObject: rui];
debugLog(@"rui rc %i", rui.retainCount);
[rui release];
[self dismissModalViewControllerAnimated:TRUE];
}
我认为这里没有任何错误：ReviewUpload有一个可能包含ReviewUploadImage对象的图像数组。在这些类的实现中，我只有发布方法，我只是发布了我必须发布的成员。
@interface ReviewUpload : NSObject
{
NSString *title;
NSString *tags;
NSString *text;
NSInteger rating;
NSMutableArray *images;
NSInteger idCompany;
NSInteger idProduct;
}
@property(nonatomic, copy) NSString *title;
@property(nonatomic, copy) NSString *tags;
@property(nonatomic, copy) NSString *text;
@property(nonatomic, assign) NSInteger rating;
@property(nonatomic, retain) NSMutableArray *images;
@property(nonatomic, assign) NSInteger idCompany;
@property(nonatomic, assign) NSInteger idProduct;
@end
@interface ReviewUploadImage : NSObject
{
UIImage *thumb;
NSString *path;
}
@property(nonatomic, retain) UIImage *thumb;
@property(nonatomic, copy) NSString *path;
@end
是否有一种简单的方法可以从地址中获取objective-c对象？！
更新： 如果我删除这些行中的任何一行，我不会得到错误。我不知道该怎么说这真的很奇怪。
[reviewUpload.images removeObject: self.reviewUploadImg];
[self.navigationController popViewControllerAnimated:TRUE];
更新：如果在“didFinishPickingMediaWithInfo”中选择的图像为零，则不显示错误。也许它必须与我创建缩略图的方式做一些事情。这是创建它的方法。如果有人有任何想法，请帮助。
-(UIImage *) copyResizedImage:(CGSize) thumbSize withPaddingColor: (UIColor *) bgColor
{
CGFloat resizedProp = thumbSize.width / thumbSize.height;
CGFloat imageProp = self.size.width / self.size.height;
CGSize newSize;
CGFloat factor;
if (imageProp > resizedProp) //image is wider
factor = thumbSize.width / self.size.width;
else
factor = thumbSize.height / self.size.height;
newSize.width = self.size.width * factor;
newSize.height = self.size.height * factor;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
UIImage *resizedImage;
UIGraphicsBeginImageContext(thumbSize);
CGContextRef drwContextRef = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(drwContextRef, bgColor.CGColor);
CGContextFillRect(drwContextRef, CGRectMake(0, 0, thumbSize.width, thumbSize.height));
CGRect imageRect = CGRectMake(
(thumbSize.width - newSize.width) / 2.0,
(thumbSize.height - newSize.height) /2.0, newSize.width, newSize.height);
[self drawInRect:imageRect];
resizedImage = UIGraphicsGetImageFromCurrentImageContext(); // this is autoreleased and i dont need it
UIGraphicsEndImageContext();
[resizedImage retain];
[pool release];
return resizedImage;
}
答案 0 :(得分：4)
当从数组中删除对象时，它将发送一个dealloc消息。看一下ReviewUploadImage类的dealloc函数。我看到你有一些拇指成员。检查一下你是否保留它。无论如何，如果您的应用程序在您设置的断点处停止，您可以使用以下GDB命令查看堆栈：
backtrace -- Print backtrace of all stack frames
bt -- Print backtrace of all stack frames
down -- Select and print stack frame called by this one
frame -- Select and print a stack frame
return -- Make selected stack frame return to its caller
select-frame -- Select a stack frame without printing anything
up -- Select and print stack frame that called this one
答案 1 :(得分：0)
我做了一个malloc_history，但我真的不明白这些结果。这是否显示该地址的所有allocs和deallocs？他们必须匹配吗？ （因为他们没有，ALLOC线更大）allocs和deallocs？很抱歉在答案中出现了这个noob和askink问题。
附带问题：为什么程序不冻结？我有类似的过度释放内存的情况，他们以EXC_BAD_ACCESS或类似的方式结束。
TestWebService(740,0xa067b4e0) malloc: *** error for object 0x20e5000: pointer being freed was not allocated *** set a breakpoint in malloc_error_break to debug (gdb) shell malloc_history 207 0x20e5000 malloc_history cannot examine process 207 because the process does not exist. (gdb) shell malloc_history 740 0x20e5000 malloc_history Report Version: 2.0 Process: TestWebService [740] Path: /Users/kudorgyozo/Library/Application Support/iPhone Simulator/3.0/Applications/6AF403F5-6856-44B9-A76E-45F58355535A/TestWebService.app/TestWebService Load Address: 0x1000 Identifier: TestWebService Version: ??? (???) Code Type: X86 (Native) Parent Process: gdb-i386-apple-darwin [742] Date/Time: 2010-05-06 12:02:23.167 +0300 OS Version: Mac OS X 10.6.3 (10D573) Report Version: 6 ALLOC 0x20e3800-0x20e512f [size=6448]: thread_a067b4e0 |start | main | UIApplicationMain | GSEventRun | GSEventRunModal | CFRunLoopRunInMode | CFRunLoopRunSpecific | __NSFireDelayedPerform | -[UITableView _userSelectRowAtIndexPath:] | -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] | -[PLAlbumView tableView:didSelectRowAtIndexPath:] | -[PLUIAlbumViewController albumView:selectedPhoto:] | PLNotifyImagePickerOfImageAvailability | -[UIImagePickerController _imagePickerDidCompleteWithInfo:] | -[WriteReviewImagesController imagePickerController:didFinishPickingMediaWithInfo:] | -[UIImage(Thumbnails) copyResizedImage:withPaddingColor:] | -[UIImage drawInRect:] | -[UIImage drawInRect:blendMode:alpha:] | CGContextDrawImage | ripc_DrawImage | ripc_AcquireImage | CGSImageDataLock | img_data_lock | img_interpolate_read | img_decode_read | CGAccessSessionGetChunks | getBytes_cb | getBandProcJPG | _cg_jpeg_start_decompress | _cg_jinit_master_decompress | start_input_pass | start_pass_huff_decoder | _cg_jpeg_make_d_derived_tbl | alloc_small | malloc | malloc_zone_malloc ---- FREE 0x20e3800-0x20e512f [size=6448]: thread_a067b4e0 |start | main | UIApplicationMain | GSEventRun | GSEventRunModal | CFRunLoopRunInMode | CFRunLoopRunSpecific | __NSFireDelayedPerform | -[UITableView _userSelectRowAtIndexPath:] | -[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] | -[PLAlbumView tableView:didSelectRowAtIndexPath:] | -[PLUIAlbumViewController albumView:selectedPhoto:] | PLNotifyImagePickerOfImageAvailability | -[UIImagePickerController _imagePickerDidCompleteWithInfo:] | -[WriteReviewImagesController imagePickerController:didFinishPickingMediaWithInfo:] | -[UIImage(Thumbnails) copyResizedImage:withPaddingColor:] | -[UIImage drawInRect:] | -[UIImage drawInRect:blendMode:alpha:] | CGContextDrawImage | ripc_DrawImage | ripc_AcquireImage | CGSImageDataLock | img_data_lock | img_interpolate_read | img_decode_read | CGAccessSessionGetChunks | getBytes_cb | getBandProcJPG | _cg_jpeg_destroy | self_destruct | free_pool | free
答案 2 :(得分：-1)
一个月后，我通过卸载iphone os 4 beta sdk并安装3.2 sdk神奇地解决了这个错误。它不再给我错误了。