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UI thread issue #8

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smedic opened this issue May 12, 2020 · 0 comments
Open

UI thread issue #8

smedic opened this issue May 12, 2020 · 0 comments

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@smedic
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smedic commented May 12, 2020 •
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When I start sample in iOS, I get this:

Main Thread Checker: UI API called on a background thread: -[UIView bounds]
PID: 15282, TID: 4646718, Thread name: (none), Queue name: video_frames_queue, QoS: 33
Backtrace:
4 flutter_mrz_scanner 0x000000010042c9a0 $s19flutter_mrz_scanner14MRZScannerViewC19calculateCutoutRect33_AF9DEA6FFC6AF87E76CE73C099338E44LLSo6CGRectVyF + 76
5 flutter_mrz_scanner 0x0000000100429a0c $s19flutter_mrz_scanner14MRZScannerViewC10cutoutRect33_AF9DEA6FFC6AF87E76CE73C099338E44LL3forSo6CGRectVSo10CGImageRefa_tF + 268
6 flutter_mrz_scanner 0x0000000100429fe8 $s19flutter_mrz_scanner14MRZScannerViewC13documentImage33_AF9DEA6FFC6AF87E76CE73C099338E44LL4fromSo10CGImageRefaAH_tF + 56
7 flutter_mrz_scanner 0x000000010042ceb0 $s19flutter_mrz_scanner14MRZScannerViewC13captureOutput_03didG04fromySo09AVCaptureG0C_So17CMSampleBufferRefaSo0J10ConnectionCtF + 312
8 flutter_mrz_scanner 0x000000010042e864 $s19flutter_mrz_scanner14MRZScannerViewC13captureOutput_03didG04fromySo09AVCaptureG0C_So17CMSampleBufferRefaSo0J10ConnectionCtFTo + 124
9 AVFoundation 0x0000000190b2422c BAE1D0DC-B906-3AF2-9651-A0F35779BE54 + 999980
10 AVFoundation 0x0000000190b23f70 BAE1D0DC-B906-3AF2-9651-A0F35779BE54 + 999280
11 CoreMedia 0x000000018d09cca8 89AD72DE-9912-3E85-B361-AD7CD6D823F0 + 347304
12 CoreMedia 0x000000018d0bd988 89AD72DE-9912-3E85-B361-AD7CD6D823F0 + 481672
13 libdispatch.dylib 0x000000010047327c _dispatch_client_callout + 20
14 libdispatch.dylib 0x0000000100476058 _dispatch_continuation_pop + 572
15 libdispatch.dylib 0x0000000100489824 _dispatch_source_invoke2 + 984
16 libdispatch.dylib 0x0000000100489114 _dispatch_source_invoke + 468
17 libdispatch.dylib 0x000000010047a740 _dispatch_lane_serial_drain + 260
18 libdispatch.dylib 0x000000010047b538 _dispatch_lane_invoke + 468
19 libdispatch.dylib 0x00000001004864dc _dispatch_workloop_worker_thread + 1344
20 libsystem_pthread.dylib 0x00000001864476d0 _pthread_wqthread + 280
21 libsystem_pthread.dylib 0x000000018644d9e8 start_wqthread + 8
2020-05-12 17:59:33.801044+0200 Runner[15282:4646718] [reports] Main Thread Checker: UI API called on a background thread: -[UIView bounds]
PID: 15282, TID: 4646718, Thread name: (none), Queue name: video_frames_queue, QoS: 33
Backtrace:
4 flutter_mrz_scanner 0x000000010042c9a0 $s19flutter_mrz_scanner14MRZScannerViewC19calculateCutoutRect33_AF9DEA6FFC6AF87E76CE73C099338E44LLSo6CGRectVyF + 76
5 flutter_mrz_scanner 0x0000000100429a0c $s19flutter_mrz_scanner14MRZScannerViewC10cutoutRect33_AF9DEA6FFC6AF87E76CE73C099338E44LL3forSo6CGRectVSo10CGImageRefa_tF + 268
6 flutter_mrz_scanner 0x0000000100429fe8 $s19flutter_mrz_scanner14MRZScannerViewC13documentImage33_AF9DEA6FFC6AF87E76CE73C099338E44LL4fromSo10CGImageRefaAH_tF + 56
7 flutter_mrz_scanner 0x000000010042ceb0 $s19flutter_mrz_scanner14MRZScannerViewC13captureOutput_03didG04fromySo09AVCaptureG0C_So17CMSampleBufferRefaSo0J10ConnectionCtF + 312
8 flutter_mrz_scanner 0x000000010042e864 $s19flutter_mrz_scanner14MRZScannerViewC13captureOutput_03didG04fromySo09AVCaptureG0C_So17CMSampleBufferRefaSo0J10ConnectionCtFTo + 124
9 AVFoundation 0x0000000190b2422c BAE1D0DC-B906-3AF2-9651-A0F35779BE54 + 999980
10 AVFoundation 0x0000000190b23f70 BAE1D0DC-B906-3AF2-9651-A0F35779BE54 + 999280
11 CoreMedia 0x000000018d09cca8 89AD72DE-9912-3E85-B361-AD7CD6D823F0 + 347304
12 CoreMedia 0x000000018d0bd988 89AD72DE-9912-3E85-B361-AD7CD6D823F0 + 481672
13 libdispatch.dylib 0x000000010047327c _dispatch_client_callout + 20
14 libdispatch.dylib 0x0000000100476058 _dispatch_continuation_pop + 572
15 libdispatch.dylib 0x0000000100489824 _dispatch_source_invoke2 + 984
16 libdispatch.dylib 0x0000000100489114 _dispatch_source_invoke + 468
17 libdispatch.dylib 0x000000010047a740 _dispatch_lane_serial_drain + 260
18 libdispatch.dylib 0x000000010047b538 _dispatch_lane_invoke + 468
19 libdispatch.dylib 0x00000001004864dc _dispatch_workloop_worker_thread + 1344
20 libsystem_pthread.dylib 0x00000001864476d0 _pthread_wqthread + 280
21 libsystem_pthread.dylib 0x000000018644d9e8 start_wqthread + 8

And camera is not opened.
Any idea why and how to fix this?
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@smedic