Question

我正在尝试通过CoreNFC框架读取NFC标签，但遇到错误。已经尝试使用以下代码

任何帮助，我们将不胜感激。预先感谢。

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2019-12-30 17:35:33.709179+0530 nfcTest[2492:251252] [xpc.exceptions] <NSXPCConnection: 0x281c92e20> connection to service on pid 82 named com.apple.nfcd.service.corenfc: Exception caught during decoding of received selector didDetectExternalReaderWithNotification:, dropping incoming message.
Exception: Exception while decoding argument 0 (#2 of invocation):
Exception: decodeObjectForKey: class "NFFieldNotification" not loaded or does not exist
(
    0   CoreFoundation                      0x000000018c7e5820 FF63481D-FB6A-353B-B2C1-AC4EAECF594D + 1226784
    1   libobjc.A.dylib                     0x000000018c50dfa4 objc_exception_throw + 56
    2   Foundation                          0x000000018ccd1390 3C682044-3249-3938-8111-F2F12D066D2B + 2339728
    3   Foundation                          0x000000018caaa4e4 3C682044-3249-3938-8111-F2F12D066D2B + 83172
    4   Foundation                          0x000000018ccf35dc 3C682044-3249-3938-8111-F2F12D066D2B + 2479580
    5   Foundation                          0x000000018caff62c 3C682044-3249-3938-8111-F2F12D066D2B + 431660
    6   Foundation                          0x000000018caff994 3C682044-3249-3938-8111-F2F12D066D2B + 432532
    7   Foundation                          0x000000018cae9d70 3C682044-3249-3938-8111-F2F12D066D2B + 343408
    8   Foundation                          0x000000018cccf1bc 3C682044-3249-3938-8111-F2F12D066D2B + 2331068
    9   libxpc.dylib                        0x000000018c3b3448 219DEC3C-E62E-395D-8911-FB74F73A5598 + 50248
    10  libxpc.dylib                        0x000000018c3b37c0 219DEC3C-E62E-395D-8911-FB74F73A5598 + 51136
    11  libdispatch.dylib                   0x0000000100d4ec98 _dispatch_client_callout4 + 16
    12  libdispatch.dylib                   0x0000000100d68aa8 _dispatch_mach_msg_invoke + 420
    13  libdispatch.dylib                   0x0000000100d55990 _dispatch_lane_serial_drain + 304
    14  libdispatch.dylib                   0x0000000100d698f8 _dispatch_mach_invoke + 520
    15  libdispatch.dylib                   0x0000000100d55990 _dispatch_lane_serial_drain + 304
    16  libdispatch.dylib                   0x0000000100d56718 _dispatch_lane_invoke + 500
    17  libdispatch.dylib                   0x0000000100d61adc _dispatch_workloop_worker_thread + 1324
    18  libsystem_pthread.dylib             0x000000018c502f88 _pthread_wqthread + 276
    19  libsystem_pthread.dylib             0x000000018c505ad4 start_wqthread + 8
)
(
    0   CoreFoundation                      0x000000018c7e5820 FF63481D-FB6A-353B-B2C1-AC4EAECF594D + 1226784
    1   libobjc.A.dylib                     0x000000018c50dfa4 objc_exception_throw + 56
    2   Foundation                          0x000000018ccf3828 3C682044-3249-3938-8111-F2F12D066D2B + 2480168
    3   Foundation                          0x000000018caff62c 3C682044-3249-3938-8111-F2F12D066D2B + 431660
    4   Foundation                          0x000000018caff994 3C682044-3249-3938-8111-F2F12D066D2B + 432532
    5   Foundation                          0x000000018cae9d70 3C682044-3249-3938-8111-F2F12D066D2B + 343408
    6   Foundation                          0x000000018cccf1bc 3C682044-3249-3938-8111-F2F12D066D2B + 2331068
    7   libxpc.dylib                        0x000000018c3b3448 219DEC3C-E62E-395D-8911-FB74F73A5598 + 50248
    8   libxpc.dylib                        0x000000018c3b37c0 219DEC3C-E62E-395D-8911-FB74F73A5598 + 51136
    9   libdispatch.dylib                   0x0000000100d4ec98 _dispatch_client_callout4 + 16
    10  libdispatch.dylib                   0x0000000100d68aa8 _dispatch_mach_msg_invoke + 420
    11  libdispatch.dylib                   0x0000000100d55990 _dispatch_lane_serial_drain + 304
    12  libdispatch.dylib                   0x0000000100d698f8 _dispatch_mach_invoke + 520
    13  libdispatch.dylib                   0x0000000100d55990 _dispatch_lane_serial_drain + 304
    14  libdispatch.dylib                   0x0000000100d56718 _dispatch_lane_invoke + 500
    15  libdispatch.dylib                   0x0000000100d61adc _dispatch_workloop_worker_thread + 1324
    16  libsystem_pthread.dylib             0x000000018c502f88 _pthread_wqthread + 276
    17  libsystem_pthread.dylib             0x000000018c505ad4 start_wqthread + 8
)
Session did invalidate with error: Error Domain=NFCError Code=202 "Session invalidated unexpectedly" UserInfo={NSLocalizedDescription=Session invalidated unexpectedly}

Answer 1

您是否已在plist文件中授予权限？

隐私-NFC扫描使用说明

CoreNFC扫描错误-会话意外无效-iOS 13.2

1 个答案: