Update README.md

[bcorrea2]

Hi guys, I was experiencing a crash when users try to save imagens into galery using SKPhotoBrowser, the solution was simple but it took me some time to figure out whats was going on.

I think it is happening only in iOS >= 12.

I'm including this step into README.

Anyone had same problem?

Follow stack trace.

#1. Crashed: com.apple.root.default-qos
0  libsystem_kernel.dylib         0x23b67cdd0 __abort_with_payload + 8
1  libsystem_kernel.dylib         0x23b676924 abort_with_payload_wrapper_internal + 100
2  libsystem_kernel.dylib         0x23b676954 fcntl + 10
3  TCC                            0x23e856b50 __TCCAccessRequest_block_invoke.79 + 190
4  TCC                            0x23e856a90 __CRASHING_DUE_TO_PRIVACY_VIOLATION__ + 682
5  TCC                            0x23e85a92c __tccd_send_message_block_invoke + 260
6  libxpc.dylib                   0x23b744f5c _xpc_connection_reply_callout + 60
7  libxpc.dylib                   0x23b738684 _xpc_connection_call_reply_async + 88
8  libdispatch.dylib              0x23b521854 _dispatch_client_callout3 + 16
9  libdispatch.dylib              0x23b4f5974 _dispatch_mach_msg_async_reply_invoke$VARIANT$armv81 + 312
10 libdispatch.dylib              0x23b505778 _dispatch_kevent_worker_thread + 1228
11 libsystem_pthread.dylib        0x23b701124 _pthread_wqthread + 320
12 libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

--

#0. com.apple.main-thread
0  libsystem_kernel.dylib         0x23b6730f4 mach_msg_trap + 8
1  libsystem_kernel.dylib         0x23b6725a0 mach_msg + 72
2  CoreFoundation                 0x23ba71cb4 __CFRunLoopServiceMachPort + 236
3  CoreFoundation                 0x23ba6cbc4 __CFRunLoopRun + 1360
4  CoreFoundation                 0x23ba6c354 CFRunLoopRunSpecific + 436
5  GraphicsServices               0x23dc6c79c GSEventRunModal + 104
6  UIKitCore                      0x268023b68 UIApplicationMain + 212
7  ml-app-ios-v2                  0x100b56a70 main (AppDelegate.swift:24)
8  libdyld.dylib                  0x23b5328e0 start + 4

#1. Crashed: com.apple.root.default-qos
0  libsystem_kernel.dylib         0x23b67cdd0 __abort_with_payload + 8
1  libsystem_kernel.dylib         0x23b676924 abort_with_payload_wrapper_internal + 100
2  libsystem_kernel.dylib         0x23b676954 fcntl + 10
3  TCC                            0x23e856b50 __TCCAccessRequest_block_invoke.79 + 190
4  TCC                            0x23e856a90 __CRASHING_DUE_TO_PRIVACY_VIOLATION__ + 682
5  TCC                            0x23e85a92c __tccd_send_message_block_invoke + 260
6  libxpc.dylib                   0x23b744f5c _xpc_connection_reply_callout + 60
7  libxpc.dylib                   0x23b738684 _xpc_connection_call_reply_async + 88
8  libdispatch.dylib              0x23b521854 _dispatch_client_callout3 + 16
9  libdispatch.dylib              0x23b4f5974 _dispatch_mach_msg_async_reply_invoke$VARIANT$armv81 + 312
10 libdispatch.dylib              0x23b505778 _dispatch_kevent_worker_thread + 1228
11 libsystem_pthread.dylib        0x23b701124 _pthread_wqthread + 320
12 libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#2. com.apple.uikit.eventfetch-thread
0  libsystem_kernel.dylib         0x23b6730f4 mach_msg_trap + 8
1  libsystem_kernel.dylib         0x23b6725a0 mach_msg + 72
2  CoreFoundation                 0x23ba71cb4 __CFRunLoopServiceMachPort + 236
3  CoreFoundation                 0x23ba6cbc4 __CFRunLoopRun + 1360
4  CoreFoundation                 0x23ba6c354 CFRunLoopRunSpecific + 436
5  Foundation                     0x23c439fcc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 300
6  Foundation                     0x23c439e5c -[NSRunLoop(NSRunLoop) runUntilDate:] + 96
7  UIKitCore                      0x268109540 -[UIEventFetcher threadMain] + 136
8  Foundation                     0x23c5666e4 __NSThread__start__ + 984
9  libsystem_pthread.dylib        0x23b7002c0 _pthread_body + 128
10 libsystem_pthread.dylib        0x23b700220 _pthread_start + 44
11 libsystem_pthread.dylib        0x23b703cdc thread_start + 4

#3. Thread
0  libsystem_kernel.dylib         0x23b67eb74 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x23b701138 _pthread_wqthread + 340
2  libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#4. GAIThread
0  libsystem_kernel.dylib         0x23b6730f4 mach_msg_trap + 8
1  libsystem_kernel.dylib         0x23b6725a0 mach_msg + 72
2  CoreFoundation                 0x23ba71cb4 __CFRunLoopServiceMachPort + 236
3  CoreFoundation                 0x23ba6cbc4 __CFRunLoopRun + 1360
4  CoreFoundation                 0x23ba6c354 CFRunLoopRunSpecific + 436
5  Foundation                     0x23c439fcc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 300
6  Foundation                     0x23c47549c -[NSRunLoop(NSRunLoop) run] + 88
7  ml-app-ios-v2                  0x1010d71ec +[GAI threadMain:] + 4307677676
8  Foundation                     0x23c5666e4 __NSThread__start__ + 984
9  libsystem_pthread.dylib        0x23b7002c0 _pthread_body + 128
10 libsystem_pthread.dylib        0x23b700220 _pthread_start + 44
11 libsystem_pthread.dylib        0x23b703cdc thread_start + 4

#5. com.twitter.crashlytics.ios.MachExceptionServer
0  libsystem_kernel.dylib         0x23b6730f4 mach_msg_trap + 8
1  libsystem_kernel.dylib         0x23b6725a0 mach_msg + 72
2  ml-app-ios-v2                  0x101174f60 CLSMachExceptionServer + 4308324192
3  libsystem_pthread.dylib        0x23b7002c0 _pthread_body + 128
4  libsystem_pthread.dylib        0x23b700220 _pthread_start + 44
5  libsystem_pthread.dylib        0x23b703cdc thread_start + 4

#6. com.apple.NSURLConnectionLoader
0  libsystem_kernel.dylib         0x23b6730f4 mach_msg_trap + 8
1  libsystem_kernel.dylib         0x23b6725a0 mach_msg + 72
2  CoreFoundation                 0x23ba71cb4 __CFRunLoopServiceMachPort + 236
3  CoreFoundation                 0x23ba6cbc4 __CFRunLoopRun + 1360
4  CoreFoundation                 0x23ba6c354 CFRunLoopRunSpecific + 436
5  CFNetwork                      0x23c08574c -[__CoreSchedulingSetRunnable runForever] + 216
6  Foundation                     0x23c5666e4 __NSThread__start__ + 984
7  libsystem_pthread.dylib        0x23b7002c0 _pthread_body + 128
8  libsystem_pthread.dylib        0x23b700220 _pthread_start + 44
9  libsystem_pthread.dylib        0x23b703cdc thread_start + 4

#7. com.apple.mobileslideshow.accessCallbacks
0  libsystem_kernel.dylib         0x23b673130 semaphore_wait_trap + 8
1  libdispatch.dylib              0x23b4f0964 _dispatch_sema4_wait$VARIANT$armv81 + 24
2  libdispatch.dylib              0x23b4f13e0 _dispatch_semaphore_wait_slow + 128
3  AssetsLibraryServices          0x24917687c __79-[PLPrivacy _isPhotosAccessAllowedWithScope:forceHandler:accessAllowedHandler:]_block_invoke_2 + 384
4  AssetsLibraryServices          0x24915e1cc __pl_dispatch_async_block_invoke + 36
5  libdispatch.dylib              0x23b520a38 _dispatch_call_block_and_release + 24
6  libdispatch.dylib              0x23b5217d4 _dispatch_client_callout + 16
7  libdispatch.dylib              0x23b4fcdec _dispatch_lane_serial_drain$VARIANT$armv81 + 548
8  libdispatch.dylib              0x23b4fd92c _dispatch_lane_invoke$VARIANT$armv81 + 408
9  libdispatch.dylib              0x23b505e08 _dispatch_workloop_worker_thread + 584
10 libsystem_pthread.dylib        0x23b701114 _pthread_wqthread + 304
11 libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#8. Thread
0  libsystem_kernel.dylib         0x23b67eb74 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x23b701138 _pthread_wqthread + 340
2  libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#9. Thread
0  libsystem_kernel.dylib         0x23b67eb74 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x23b7011f8 _pthread_wqthread + 532
2  libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#10. NSOperationQueue 0x2828188c0 (QOS: UNSPECIFIED)
0  libsystem_kernel.dylib         0x23b673148 semaphore_timedwait_trap + 8
1  libdispatch.dylib              0x23b4f0a4c _dispatch_sema4_timedwait$VARIANT$armv81 + 64
2  libdispatch.dylib              0x23b4f13a8 _dispatch_semaphore_wait_slow + 72
3  AirshipKit                     0x1018ad048 -[UADelay start] (UADelay.m:31)
4  AirshipKit                     0x1018ad1fc __34-[UADelayOperation initWithDelay:]_block_invoke (UADelayOperation.m:17)
5  Foundation                     0x23c544f68 __NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ + 16
6  Foundation                     0x23c451420 -[NSBlockOperation main] + 72
7  Foundation                     0x23c450908 -[__NSOperationInternal _start:] + 740
8  Foundation                     0x23c546cec __NSOQSchedule_f + 272
9  libdispatch.dylib              0x23b520a38 _dispatch_call_block_and_release + 24
10 libdispatch.dylib              0x23b5217d4 _dispatch_client_callout + 16
11 libdispatch.dylib              0x23b4f8c34 _dispatch_continuation_pop$VARIANT$armv81 + 404
12 libdispatch.dylib              0x23b4f8314 _dispatch_async_redirect_invoke + 592
13 libdispatch.dylib              0x23b5049d4 _dispatch_root_queue_drain + 340
14 libdispatch.dylib              0x23b505248 _dispatch_worker_thread2 + 116
15 libsystem_pthread.dylib        0x23b7011b4 _pthread_wqthread + 464
16 libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#11. Thread
0  libsystem_kernel.dylib         0x23b67eb74 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x23b7011f8 _pthread_wqthread + 532
2  libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#12. Thread
0  libsystem_kernel.dylib         0x23b67eb74 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x23b701138 _pthread_wqthread + 340
2  libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#13. Thread
0  libsystem_kernel.dylib         0x23b67eb74 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x23b701138 _pthread_wqthread + 340
2  libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#14. Thread
0  libsystem_kernel.dylib         0x23b67eb74 __workq_kernreturn + 8
1  libsystem_pthread.dylib        0x23b7011f8 _pthread_wqthread + 532
2  libsystem_pthread.dylib        0x23b703cd4 start_wqthread + 4

#15. TAGThread
0  libsystem_kernel.dylib         0x23b6730f4 mach_msg_trap + 8
1  libsystem_kernel.dylib         0x23b6725a0 mach_msg + 72
2  CoreFoundation                 0x23ba71cb4 __CFRunLoopServiceMachPort + 236
3  CoreFoundation                 0x23ba6cbc4 __CFRunLoopRun + 1360
4  CoreFoundation                 0x23ba6c354 CFRunLoopRunSpecific + 436
5  Foundation                     0x23c439fcc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 300
6  Foundation                     0x23c47549c -[NSRunLoop(NSRunLoop) run] + 88
7  ml-app-ios-v2                  0x1010fe730 +[TAGDispatchUtil threadMain:] + 4307838768
8  Foundation                     0x23c5666e4 __NSThread__start__ + 984
9  libsystem_pthread.dylib        0x23b7002c0 _pthread_body + 128
10 libsystem_pthread.dylib        0x23b700220 _pthread_start + 44
11 libsystem_pthread.dylib        0x23b703cdc thread_start + 4

[suzuki-0000]

Thank you for the update!