ios - 是否可以将dispatch_queue_t添加到NSMutableArray？

Question

我正在尝试将dispatch_queue_t添加到NSMutableArray中，如下所示:

    NSMutableArray* queuesWaitingForTargetQueue = (__bridge NSMutableArray*)dispatch_queue_get_specific(targetQueue, WAITING_QUEUE_LIST_KEY);

    NSLog(@"    dispatch_get_current_queue() = %#x", (unsigned int)dispatch_get_current_queue());
    NSLog(@"    dispatch_get_main_queue()    = %#x", (unsigned int)dispatch_get_main_queue());
    NSLog(@"    currQueueId                  = %#x", (unsigned int)currQueueId);
    NSLog(@"    queuesWaitingForTargetQueue  = %#x (%@)", (unsigned int)queuesWaitingForTargetQueue, NSStringFromClass([queuesWaitingForTargetQueue class]));

    [queuesWaitingForTargetQueue addObject:(__bridge id)currQueueId];

最后一行有时会因EXC_BAD_ACCESS而失败:

Thread 1: EXC_BAD_ACCESS (code=1, address=0xc08314eb)

输出为:

 dispatch_get_current_queue() = 0x2879640
 dispatch_get_main_queue()    = 0x2879640
 currQueueId                  = 0x2879640
 queuesWaitingForTargetQueue  = 0x8672ae0 (__NSArrayM)

这有什么问题吗？

Answer 1

您的内存管理在这里将是一个真正的问题-崩溃几乎可以肯定是指向先前发布的对象的指针。如果确实需要移动数组，则使用高级桥强制转换(CFBridging ...)从id到CFType(如CFMutableDictionary)来回移动数组，然后使用CF对象作为键。完成后，CFR释放CF对象。