Question

由于某些奇怪的原因，我无法隐藏导航栏中的后退按钮。

我已尝试过以下所有内容，但没有任何效果。

还有其他建议吗？

**＆＃34; Back＆＃34;按钮出现，但按下时没有任何反应。

    self.navigationItem.leftBarButtonItem=nil;
    self.navigationItem.backBarButtonItem=nil;
    self.navigationItem.hidesBackButton=YES;
    self.navigationController.navigationItem.backBarButtonItem=nil;
    self.navigationController.navigationItem.leftBarButtonItem=nil;
    self.navigationController.navigationItem.hidesBackButton=YES;

Answer 1

您可以使用以下代码隐藏后退按钮：

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread:  0

Last Exception Backtrace:
0   CoreFoundation                  0x182b482d8 __exceptionPreprocess + 132
1   libobjc.A.dylib                 0x1941080e4 objc_exception_throw + 60
2   CoreFoundation                  0x182a31428 -[__NSDictionaryM setObject:forKey:] + 972
3   ViadeskKit                      0x10011c5dc 0x100114000 + 34268
4   ViadeskKit                      0x10011cd98 0x100114000 + 36248
5   CoreFoundation                  0x182aee2c4 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20
6   CoreFoundation                  0x182a2b450 _CFXNotificationPost + 2060
7   Foundation                      0x18395aa80 -[NSNotificationCenter postNotificationName:object:userInfo:] + 72
8   ViadeskKit                      0x100125718 0x100114000 + 71448
9   ViadeskKit                      0x100132678 0x100114000 + 124536
10  CFNetwork                       0x1825c85b8 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke + 80
11  CFNetwork                       0x1825c8548 -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 208
12  CFNetwork                       0x1825c86c4 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 60
13  CFNetwork                       0x18249b990 ___ZN27URLConnectionClient_Classic26_delegate_didFinishLoadingEU13block_pointerFvvE_block_invoke + 104
14  CFNetwork                       0x18256550c ___ZN27URLConnectionClient_Classic18_withDelegateAsyncEPKcU13block_pointerFvP16_CFURLConnectionPK33CFURLConnectionClientCurrent_VMaxE_block_invoke_2 + 104
15  CFNetwork                       0x182487ac8 RunloopBlockContext::_invoke_block(void const*, void*) + 76
16  CoreFoundation                  0x182a28cdc CFArrayApplyFunction + 68
17  CFNetwork                       0x182487974 RunloopBlockContext::perform() + 136
18  CFNetwork                       0x182487828 MultiplexerSource::perform() + 312
19  CFNetwork                       0x182487654 MultiplexerSource::_perform(void*) + 68
20  CoreFoundation                  0x182b00240 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
21  CoreFoundation                  0x182aff59c __CFRunLoopDoSources0 + 448
22  CoreFoundation                  0x182afd594 __CFRunLoopRun + 712
23  CoreFoundation                  0x182a292d4 CFRunLoopRunSpecific + 396
24  GraphicsServices                0x18c1076fc GSEventRunModal + 168
25  UIKit                           0x1875eefac UIApplicationMain + 1488
26  Viadesk                         0x10004e4d8 main (main.m:16)
27  libdyld.dylib                   0x194786a08 start + 4


Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib          0x000000019489f270 __pthread_kill + 8
1   libsystem_pthread.dylib         0x000000019493d16c pthread_kill + 108
2   libsystem_c.dylib               0x0000000194816b14 abort + 108
3   libc++abi.dylib                 0x00000001938d5414 abort_message + 112
4   libc++abi.dylib                 0x00000001938f4b88 default_terminate_handler() + 300
5   libobjc.A.dylib                 0x00000001941083bc _objc_terminate() + 124
6   libc++abi.dylib                 0x00000001938f1bb0 std::__terminate(void (*)()) + 12
7   libc++abi.dylib                 0x00000001938f1474 __cxa_throw + 132
8   libobjc.A.dylib                 0x0000000194108200 objc_exception_throw + 344
9   CoreFoundation                  0x0000000182a31424 -[__NSDictionaryM setObject:forKey:] + 968
10  ViadeskKit                      0x000000010011c5d8 0x100114000 + 34264
11  ViadeskKit                      0x000000010011cd94 0x100114000 + 36244
12  CoreFoundation                  0x0000000182aee2c0 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 16
13  CoreFoundation                  0x0000000182a2b44c _CFXNotificationPost + 2056
14  Foundation                      0x000000018395aa7c -[NSNotificationCenter postNotificationName:object:userInfo:] + 68
15  ViadeskKit                      0x0000000100125714 0x100114000 + 71444
16  ViadeskKit                      0x0000000100132674 0x100114000 + 124532
17  CFNetwork                       0x00000001825c85b4 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke + 76
18  CFNetwork                       0x00000001825c8544 -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 204
19  CFNetwork                       0x00000001825c86c0 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 56
20  CFNetwork                       0x000000018249b98c ___ZN27URLConnectionClient_Classic26_delegate_didFinishLoadingEU13block_pointerFvvE_block_invoke + 100
21  CFNetwork                       0x0000000182565508 ___ZN27URLConnectionClient_Classic18_withDelegateAsyncEPKcU13block_pointerFvP16_CFURLConnectionPK33CFURLConnectionClientCurrent_VMaxE_block_invoke_2 + 100
22  CFNetwork                       0x0000000182487ac4 RunloopBlockContext::_invoke_block(void const*, void*) + 72
23  CoreFoundation                  0x0000000182a28cd8 CFArrayApplyFunction + 64
24  CFNetwork                       0x0000000182487970 RunloopBlockContext::perform() + 132
25  CFNetwork                       0x0000000182487824 MultiplexerSource::perform() + 308
26  CFNetwork                       0x0000000182487650 MultiplexerSource::_perform(void*) + 64
27  CoreFoundation                  0x0000000182b0023c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 20
28  CoreFoundation                  0x0000000182aff598 __CFRunLoopDoSources0 + 444
29  CoreFoundation                  0x0000000182afd590 __CFRunLoopRun + 708
30  CoreFoundation                  0x0000000182a292d0 CFRunLoopRunSpecific + 392
31  GraphicsServices                0x000000018c1076f8 GSEventRunModal + 164
32  UIKit                           0x00000001875eefa8 UIApplicationMain + 1484
33  Viadesk                         0x000000010004e4d4 main (main.m:16)
34  libdyld.dylib                   0x0000000194786a04 start + 0

后退按钮拒绝隐藏

1 个答案: