ios – ARC：如何在对象中注入自定义dealloc IMP,后者又调用原始dealloc而不会导致malloc错误

我正在尝试执行以下操作：

>获得一个类’dealloc IMP
>向所述类注入一个自定义IMP,它基本上调用原始的dealloc IMP
>当所述类的实例被释放时,两个IMP都应该运行.

这是我的尝试：

@implementation ClassB

- (void)dealloc
{
    NSLog(@"\n%@ | %@",self,NSStringFromSELEctor(_cmd));
}

@end


@implementation ClassC

- (void)swizzleMe:(id)target
{
    SEL originalDeallocSELEctor = NSSELEctorFromString(@"dealloc");
    __block IMP callerDealloc = [target methodForSELEctor:originalDeallocSELEctor];
    const char *deallOCMethodTypeEncoding = method_getTypeEncoding(class_geTinstanceMethod([target class],originalDeallocSELEctor));
    IMP newCallerDealloc = imp_implementationWithBlock(^(id _caller) {
        NSLog(@"\n new dealloc | calling block %p for %@",callerDealloc,_caller);
        callerDealloc(_caller,originalDeallocSELEctor);
    });

    NSLog(@"\nswapping %p for %p",newCallerDealloc,callerDealloc);

    class_replaceMethod([target class],originalDeallocSELEctor,deallOCMethodTypeEncoding);

}

@end

像这样使用：

ClassB *b = [[ClassB alloc] init];
ClassC *c = [[ClassC alloc] init];
[c swizzleMe:b];

但结果是：

禁用僵尸对象：

2013-07-03 13:24:58.368 runtimeTest[38626:11303] 
swapping 0x96df020 for 0x2840
2013-07-03 13:24:58.369 runtimeTest[38626:11303] 
 new dealloc | calling block 0x2840 for <ClassB: 0x93282f0>
2013-07-03 13:24:58.370 runtimeTest[38626:11303] 
<ClassB: 0x93282f0> | dealloc
2013-07-03 13:24:58.370 runtimeTest[38626:11303] 
 new dealloc | calling block 0x2840 for <ClassB: 0x93282f0>
2013-07-03 13:24:58.371 runtimeTest[38626:11303] 
<ClassB: 0x93282f0> | dealloc
runtimeTest(38626,0xac55f2c0) malloc: *** error for object 0x93282f0: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
2013-07-03 13:24:58.371 runtimeTest[38626:11303] 
 new dealloc | calling block 0x2840 for <ClassB: 0x93282f0>
2013-07-03 13:24:58.372 runtimeTest[38626:11303] 
<ClassB: 0x93282f0> | dealloc

启用僵尸对象(第11行是图片中的EXC_BAD_ACCESS)

2013-07-03 13:34:37.466 runtimeTest[38723:11303] 
swapping 0x97df020 for 0x2840
2013-07-03 13:34:37.467 runtimeTest[38723:11303] 
 new dealloc | calling block 0x2840 for <ClassB: 0x715a920>
2013-07-03 13:34:37.468 runtimeTest[38723:11303] 
<ClassB: 0x715a920> | dealloc

关于我做错了什么的任何想法？