目标C/ Mac / Yosemite :使用新的CryptoTokenKit API读取智能卡

Question

我试图用yosemite (CryptoTokenKit)发布的新API读取智能卡的详细信息。

我能够得到插槽的名称，但是得到插槽的回调函数似乎没有返回。

NSLog(@"START OF PROGRAM");
TKSmartCardSlotManager *manager = [TKSmartCardSlotManager defaultManager];

if(manager != NULL){

   NSArray *slots = [manager slotNames];

   if([slots count]>0){

        NSString *slotName = [slots objectAtIndex:0];

        NSLog(@"Slot Name : %@",slotName);

        [manager getSlotWithName:slotName reply:^(TKSmartCardSlot *slot) {
               NSLog(@"slot -- >%@",slot);
            }];
   }
   else{
        NSLog(@"no slots available");
   }

}else{
       NSLog(@"Card manager is null");
    }

 NSLog(@"END OF PROGRAM");
}

结果如下，

#
2015-01-18 17:16:37.584 emiratesID-Coca[4449:31081] START OF PROGRAM
2015-01-18 17:16:37.588 emiratesID-Coca[4449:31081] Slot Name : OMNIKEY CardMan (076B:3021) 3021
2015-01-18 17:16:37.588 emiratesID-Coca[4449:31081] END OF PROGRAM

回调块没有被呼叫，我是不是漏了什么东西？

提前谢谢。

Answer 1

显然，回调块是异步块，因此在上面的代码中程序不等待结果，并且在异步块完成其执行之前存在。

为了让主线程等待异步结果，必须进行适当的同步。请参阅以下更新的代码(标记为新的更改)：

#
NSLog(@"START OF PROGRAM");


TKSmartCardSlotManager *manager = [TKSmartCardSlotManager defaultManager];

if(manager != NULL){

NSArray *slots = [manager slotNames];

if([slots count]>0){

    NSString *slotName = [slots objectAtIndex:0];


    NSLog(@"Slot Name : %@",slotName);

    dispatch_semaphore_t sema = dispatch_semaphore_create(0); // NEW

    [manager getSlotWithName:slotName reply:^(TKSmartCardSlot *slot) {

        //<#code#>

        NSLog(@"slot instance ---  %d",[[slot makeSmartCard] valid]);

        dispatch_semaphore_signal(sema); // NEW


    }];


    dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER); // NEW

}else{

    NSLog(@"no slots available");

}


}else{
    NSLog(@"Card manager is null");
}

NSLog(@"END OF PROGRAM");

######

根据上述代码，结果如下-

#
   START OF PROGRAM
   Slot Name : OMNIKEY CardMan (076B:3021) 3021
   slot instance ---  <TKSmartCardSlot: 0x600000080140>
   END OF PROGRAM

#

Answer 2

您是否在控制台/日志中看到"ctk:连接到插槽注册服务器失败“？(即com.apple.security.smartcard的权利设置为布尔值:YES)。