我在 XCode 中遇到内存泄漏问题，我尽力清除分析器指出的所有问题，我的项目在 ARC 管理下，XCode 4.6.3，Parse.framework 1.2.11。
这个问题似乎与使用 Parse.com 框架结合起来出现（至少方法的名称暗示：PF_SBJsonParser）。我没有在任何地方单独使用 SBJsonParser，我发现使用 grep 它是包含在我的项目中的 Parse 二进制文件（大约 17MB）的一部分。
我经历了很多关于 SO 和 SBJsonParser 过去似乎遭受内存泄漏的主题，也有人建议不要专注于库，而是检查如何处理来自库的数据。我试过了，但看不到任何导致这种情况的异常。主要问题是我无法确定麻烦的代码行，因为在单击内存泄漏工具中的行时，我总是被称为“汇编程序”。
我附上了内存泄漏仪器的两个打印屏幕，任何正确方向的建议或指针将不胜感激！
回溯泄漏
Leaked Object # Address Size Resp. Library Responsible Frame
__NSCFString 32 < multiple > 1.00 KB Foundation -[NSPlaceholderMutableString initWithCapacity:]
__NSCFString 113 < multiple > 3.44 KB MyLib -[PF_SBJsonParser scanRestOfDictionary:]
__NSCFString 367 < multiple > 11.47 KB Foundation -[NSPlaceholderMutableString initWithCapacity:]
Malloc 176 Bytes 6 < multiple > 1.03 KB MyLib +[PFInternalUtils decodeDictionary:]
__NSCFString 64 < multiple > 2.00 KB Foundation -[NSPlaceholderMutableString initWithCapacity:]
Malloc 32 Bytes 13 < multiple > 416 Bytes MyLib -[PF_SBJsonParser scanRestOfArray:]
Malloc 32 Bytes 359 < multiple > 11.22 KB MyLib -[PF_SBJsonParser scanRestOfString:]
NSMutableArray 21 < multiple > 672 Bytes MyLib -[PF_SBJsonParser scanRestOfArray:]
Malloc 176 Bytes 7 < multiple > 1.20 KB MyLib +[PFInternalUtils decodeDictionary:]
Malloc 64 Bytes 21 < multiple > 1.31 KB MyLib -[PF_SBJsonParser scanRestOfDictionary:]
__NSDictionaryM 7 < multiple > 224 Bytes MyLib +[PFInternalUtils decodeDictionary:]
Malloc 64 Bytes 20 < multiple > 1.25 KB MyLib -[PF_SBJsonParser scanRestOfDictionary:]
__NSDictionaryM 21 < multiple > 672 Bytes MyLib -[PF_SBJsonParser scanRestOfDictionary:]
Malloc <> 32 < multiple > 1.20 KB MyLib -[PF_SBJsonParser scanRestOfString:]
Malloc <> 63 < multiple > 2.53 KB MyLib -[PF_SBJsonParser scanRestOfString:]
__NSCFString 49 < multiple > 784 Bytes MyLib -[PF_SBJsonParser scanRestOfDictionary:]
NSDecimalNumber 29 < multiple > 464 Bytes Foundation -[NSDecimalNumberPlaceholder initWithDecimal:]
Malloc <> 7 < multiple > 1.66 KB MyLib -[PF_SBJsonParser scanRestOfArray:]
调用树
Bytes Used # Leaks Symbol Name
29.42 KB 69.2% 917 -[PF_SBJsonParser scanRestOfString:]
29.42 KB 69.2% 917 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanRestOfArray:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanRestOfDictionary:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanRestOfDictionary:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanRestOfDictionary:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanRestOfArray:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanRestOfDictionary:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanRestOfDictionary:]
22.69 KB 53.4% 726 -[PF_SBJsonParser scanValue:]
22.69 KB 53.4% 726 -[PF_SBJsonParser fragmentWithString:]
22.69 KB 53.4% 726 -[PF_SBJsonParser objectWithString:]
22.69 KB 53.4% 726 +[PFInternalUtils parseJSON:]
22.69 KB 53.4% 726 __54+[PFNetworkCommandRunner runCommandAsync:inOperation:]_block_invoke
部件
+0x1eb movl $0, -44(%ebp)
+0x1f2 jmp __54+[PFNetworkCommandRunner runCommandAsync:inOperation:]_block_invoke +0x269
+0x1f4 movl 28(%ebx), %eax
+0x1f7 movl 4290952(%edi), %ecx
+0x1fd movl %ecx, 4(%esp)
+0x201 movl %eax, (%esp)
+0x204 calll DYLD-STUB$$objc_msgSend
+0x209 movl %eax, (%esp)
+0x20c calll DYLD-STUB$$objc_retainAutoreleasedReturnValue
+0x211 movl %eax, -44(%ebp)
+0x214 movl 4300120(%edi), %edx
+0x21a movl 4287040(%edi), %ecx
+0x220 movl %eax, 8(%esp)
+0x224 movl %ecx, 4(%esp)
+0x228 movl %edx, (%esp)
+0x22b calll DYLD-STUB$$objc_msgSend <<< marked as an issue (98.4%)
+0x230 movl %eax, (%esp)
+0x233 calll DYLD-STUB$$objc_retainAutoreleasedReturnValue
+0x238 movl %eax, %ebx
+0x23a movl 4300120(%edi), %eax
+0x240 movl 4288668(%edi), %ecx
+0x246 movl %ebx, 8(%esp)
+0x24a movl %ecx, 4(%esp)
+0x24e movl %eax, (%esp)
+0x251 calll DYLD-STUB$$objc_msgSend <<< marked as issue (1.6%)
+0x256 movl %eax, (%esp)
+0x259 calll DYLD-STUB$$objc_retainAutoreleasedReturnValue
+0x25e movl %eax, -52(%ebp)
+0x261 movl %ebx, (%esp)
+0x264 calll DYLD-STUB$$objc_release
更新
一点背景知识 - 我有一个 DB 类 User 和 DB 类 AdListing，它有一个属性“userId”（指向用户的指针）。经过一番挖掘后，我想我找到了有问题的行，尽管我不知道如何修复它......似乎 includeKey 产生了很多泄漏 - 如果我注释掉第二行，它会继续没有任何内存泄漏，未注释的会生成上述共享泄漏。
PFQuery *adQuery = [PFQuery queryWithClassName:@"AdListing"];
[adQuery includeKey:@"userId"]; // <== troublemaker
[adQuery whereKey:@"isActivated" equalTo:[NSNumber numberWithBool:YES]];
[adQuery whereKey:@"isRejected" equalTo:[NSNumber numberWithBool:NO]];
[adQuery whereKey:@"userId" notEqualTo:[PFUser currentUser]];
[adQuery setLimit: VERTICAL_SCROLL_STEP];
[adQuery orderByAscending:@"dateAvailableStart"];
[adQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
// The find succeeded.
NSLog(@"Successfully retrieved %d scores.", objects.count);
}
}];
任何提示或建议将不胜感激，谢谢！