Getting a “This application is modifying the autolayout engine from a background thread” error?

Question

Been encountering this error a lot in my OS X using swift:

\"This application is modifying the autolayout engine from a background thread, which can

Answer 1

Here check out this line from the logs

$S12AppName18ViewControllerC11Func()ySS_S2StF + 4420

you can check that which function calling from the either background thread or where you are calling api method you need to call your function from the main thread like this.

DispatchQueue.main.async { func()}

func() is that function you want to call in the result of api call success or else.

Logs Here

This application is modifying the autolayout engine from a background thread after the engine was accessed from the main thread. This can lead to engine corruption and weird crashes.
 Stack:(
    0   Foundation                          0x00000001c570ce50  + 96
    1   Foundation                          0x00000001c5501868  + 32
    2   Foundation                          0x00000001c5544370  + 540
    3   Foundation                          0x00000001c5543840  + 396
    4   Foundation                          0x00000001c554358c  + 272
    5   Foundation                          0x00000001c5542e10  + 264
    6   UIKitCore                           0x00000001f20d62e4  + 488
    7   UIKitCore                           0x00000001f20d67b0  + 36
    8   UIKitCore                           0x00000001f20d6eb0  + 84
    9   Foundation                          0x00000001c571d124  + 76
    10  Foundation                          0x00000001c54ff30c  + 108
    11  Foundation                          0x00000001c54fe304  + 328
    12  UIKitCore                           0x00000001f151dc0c  + 156
    13  UIKitCore                           0x00000001f151e0c0  + 152
    14  UIKitCore                           0x00000001f1514834  + 868
    15  UIKitCore                           0x00000001f1518760  + 104
    16  UIKitCore                           0x00000001f1543370  + 1772
    17  UIKitCore                           0x00000001f1546598  + 120
    18  UIKitCore                           0x00000001f14fc850  + 1452
    19  UIKitCore                           0x00000001f168f318  + 196
    20  UIKitCore                           0x00000001f168d330  + 144
    21  AppName                        0x0000000100b8ed00 $S12AppName18ViewControllerC11Func()ySS_S2StF + 4420
    22  AppName                        0x0000000100b8d9f4 $S12CcfU0_y10Foundation4DataVSg_So13NSURLResponseCSgs5Error_pSgtcfU_ + 2384
    23  App NAme                        0x0000000100a98f3c $S10Foundation4DataVSgSo13NSURLResponseCSgs5Error_pSgIegggg_So6NSDataCSgAGSo7NSErrorCSgIeyByyy_TR + 316
    24  CFNetwork                           0x00000001c513aa00  + 32
    25  CFNetwork                           0x00000001c514f1a0  + 176
    26  Foundation                          0x00000001c55ed8bc  + 16
    27  Foundation                          0x00000001c54f5ab8  + 72
    28  Foundation                          0x00000001c54f4f8c  + 740
    29  Foundation                          0x00000001c55ef790  + 272
    30  libdispatch.dylib                   0x000000010286f824 _dispatch_call_block_and_release + 24
    31  libdispatch.dylib                   0x0000000102870dc8 _dispatch_client_callout + 16
    32  libdispatch.dylib                   0x00000001028741c4 _dispatch_continuation_pop + 528
    33  libdispatch.dylib                   0x0000000102873604 _dispatch_async_redirect_invoke + 632
    34  libdispatch.dylib                   0x00000001028821dc _dispatch_root_queue_drain + 376
    35  libdispatch.dylib                   0x0000000102882bc8 _dispatch_worker_thread2 + 156
    36  libsystem_pthread.dylib             0x00000001c477917c _pthread_wqthread + 472
    37  libsystem_pthread.dylib             0x00000001c477bcec start_wqthread + 4
)