使用方案二，但是暂停主线程，会出现偶现的崩溃

[fengzipiaoling]

0	libsystem_kernel.dylib 0x000000018329004c __abort_with_payload + 8
libsystem_kernel.dylib 0x000000018328a968 abort_with_payload_wrapper_internal + 100
libsystem_kernel.dylib 0x000000018328a904 abort_with_payload_wrapper_internal + 0
libobjc.A.dylib 0x00000001829c3f54 _objc_fatalv+ 32596 (unsigned long long, unsigned long long, char const*, char*) + 112
libobjc.A.dylib 0x00000001829c3eac __objc_error + 0
libobjc.A.dylib 0x00000001829cdc0c rwlock_tt::unlockRead+ 72716 () + 0
libobjc.A.dylib 0x00000001829cd988 lookUpImpOrForward + 84
libobjc.A.dylib 0x00000001829d8c38 _objc_msgSend_uncached + 56
MyApp 0x00000001049c7e40 0x104994000 + 212544 (thread_singal_handler + 72)
libsystem_platform.dylib 0x000000018342cb48 _sigtramp + 36
libobjc.A.dylib 0x00000001829c953c realizeClass+ 54588 (objc_class*) + 660
libobjc.A.dylib 0x00000001829c740c look_up_class + 96
Foundation 0x0000000184194640 NSClassFromString + 196
MyApp 0x000000010525def4 0x105258000 + 24308 (-[UIViewController(hook) utm_viewDidAppear:] + 44)
MyApp 0x0000000104bbddc8 0x104ba0000 + 122312 (-[WDBaseViewController viewDidAppear:] + 56)
UIKit 0x000000018d4667b8 -[UIViewController _setViewAppearState:isAnimating:] + 840
UIKit 0x000000018d4bcb8c -[UINavigationController viewDidAppear:] + 204
UIKit 0x000000018d4667b8 -[UIViewController _setViewAppearState:isAnimating:] + 840
UIKit 0x000000018d4bcd1c -[UITabBarController viewDidAppear:] + 124
UIKit 0x000000018d4667b8 -[UIViewController _setViewAppearState:isAnimating:] + 840
UIKit 0x000000018d6b747c __64-[UIViewController viewDidMoveToWindow:shouldAppearOrDisappear:]_block_invoke + 44
UIKit 0x000000018d4bc814 -[UIViewController _executeAfterAppearanceBlock] + 92
UIKit 0x000000018d7c29c4 _runAfterCACommitDeferredBlocks + 564
UIKit 0x000000018d7b898c _cleanUpAfterCAFlushAndRunDeferredBlocks + 384
UIKit 0x000000018d7c96c0 __34-[UIApplication _firstCommitBlock]_block_invoke_2 + 152
CoreFoundation 0x00000001837b32bc CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK + 20
CoreFoundation 0x00000001837b2a7c __CFRunLoopDoBlocks + 264
CoreFoundation 0x00000001837b07b0 __CFRunLoopRun + 1224
CoreFoundation 0x00000001836d0da8 CFRunLoopRunSpecific + 552
GraphicsServices 0x00000001856b3020 GSEventRunModal + 100
UIKit 0x000000018d6b178c UIApplicationMain + 236
MyApp 0x0000000102814214 main + 967188 (main.m:14)
libdyld.dylib 0x0000000183161fc0 start + 4

[MoShenGuo]

获取主线程堆栈信息,为什么要暂停主线程呢?这样不是影响业务吗