Performing any operation from a background thread on UIView or a subclass is not supported and may result in unexpected and insidious behavior - swift4.2

Question

I want to make a http get request. after requesting if the request can give successful response then the other functionality works fine. but if could not give a successful response, then it takes long time loading and make this issue. after finishing loading, open new activity and then the button of new activity not working.
func httpRequester(url: String){
let myUrl = NSURL(string: url)
let request = NSMutableURLRequest(url: myUrl! as URL)
request.httpMethod = "GET"
var responseString = "Not Found"
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
if error != nil {
self.performSegue(withIdentifier: "statusActivity", sender: Any?.self)
//self.removeSpinner()
}else {
responseString = String(data: data!, encoding: String.Encoding(rawValue: String.Encoding.utf8.rawValue))!
print("responseString1 = \(responseString)")
if responseString == "Not Found" {
self.performSegue(withIdentifier: "statusActivity", sender: Any?.self)
}
//self.removeSpinner()
}
}
task.resume()
}
> [Animation] +[UIView setAnimationsEnabled:] being called from a background thread. Performing any operation from a background thread
> on UIView or a subclass is not supported and may result in unexpected
> and insidious behavior. trace=(
> 0 UIKitCore 0x00000001da64e4d4 <redacted> + 116
> 1 libdispatch.dylib 0x0000000101a04c74 _dispatch_client_callout + 16
> 2 libdispatch.dylib 0x0000000101a06c84 _dispatch_once_callout + 84
> 3 UIKitCore 0x00000001da64e45c <redacted> + 100
> 4 UIKitCore 0x00000001da64e5c8 <redacted> + 92
> 5 UIKitCore 0x00000001da614eac <redacted> + 504
> 6 UIKitCore 0x00000001da610030 <redacted> + 340
> 7 UIKitCore 0x00000001da1b85a8 <redacted> + 2064
> 8 UIKitCore 0x00000001da1b5a98 <redacted> + 176
> 9 TTGSnackbar 0x000000010142d9f0 $sSo23UIActivityIndicatorViewC5styleABSo0abC5StyleV_tcfcTO + 40
> 10 TTGSnackbar 0x000000010142b890 $sSo23UIActivityIndicatorViewC5styleABSo0abC5StyleV_tcfC + 52
> 11 TTGSnackbar 0x000000010141ad38 $s11TTGSnackbarAAC9configure33_3D47E74E3F8A802BB77D3DD363ACFD63LLyyF +
> 13072
> 12 TTGSnackbar 0x0000000101420778 $s11TTGSnackbarAAC7message8durationABSS_AA0A8DurationOtcfc + 4644
> 13 TTGSnackbar 0x000000010141f544 $s11TTGSnackbarAAC7message8durationABSS_AA0A8DurationOtcfC + 76
> 14 SynopiLive360 0x0000000100e03ff0 $s13SynopiLive360010StatusViewD10ControllerC5coderACSgSo7NSCoderC_tcfc
> + 408
> 15 SynopiLive360 0x0000000100e04564 $s13SynopiLive360010StatusViewD10ControllerC5coderACSgSo7NSCoderC_tcfcTo
> + 56
> 16 UIKitCore 0x00000001d9e8bf90 <redacted> + 248
> 17 UIFoundation 0x00000001b841af28 <redacted> + 744
> 18 UIFoundation 0x00000001b83ba304 <redacted> + 316
> 19 UIKitCore 0x00000001d9e90484 <redacted> + 188
> 20 UIFoundation 0x00000001b841af28 <redacted> + 744
> 21 UIFoundation 0x00000001b841b16c <redacted> + 1324
> 22 UIFoundation 0x00000001b83ba304 <redacted> + 316
> 23 UIKitCore 0x00000001d9e8dd6c <redacted> + 1120
> 24 UIKitCore 0x00000001da35c084 <redacted> + 196
> 25 UIKitCore 0x00000001da35cc84 <redacted> + 92
> 26 UIKitCore 0x00000001da35cee0 <redacted> + 56
> 27 UIKitCore 0x00000001d9c2d3e4 <redacted> + 104
> 28 SynopiLive360 0x0000000100e2fc24 $s13SynopiLive36022LoggedInViewControllerC12updateUrlkey3url3keyySS_SStF
> + 3160
> 29 SynopiLive360 0x0000000100e29e60 $s13SynopiLive36022LoggedInViewControllerC19simpleGetUrlRequest3url5tokenySS_SStFy10Foundation4DataVSg_So13NSURLResponseCSgs5Error_pSgtcfU_
> + 1048
> 30 SynopiLive360 0x0000000100e29464 $s10Foundation4DataVSgSo13NSURLResponseCSgs5Error_pSgIegggg_So6NSDataCSgAGSo7NSErrorCSgIeyByyy_TR
> + 284
> 31 CFNetwork 0x00000001ae3a8688 <redacted> + 32
> 32 CFNetwork 0x00000001ae3bc220 <redacted> + 176
> 33 Foundation 0x00000001ae838f68 <redacted> + 16
> 34 Foundation 0x00000001ae745420 <redacted> + 72
> 35 Foundation 0x00000001ae744908 <redacted> + 740
> 36 Foundation 0x00000001ae83acec <redacted> + 272
> 37 libdispatch.dylib 0x0000000101a036f0 _dispatch_call_block_and_release + 24
> 38 libdispatch.dylib 0x0000000101a04c74 _dispatch_client_callout + 16
> 39 libdispatch.dylib 0x0000000101a07ffc _dispatch_continuation_pop + 524
> 40 libdispatch.dylib 0x0000000101a07458 _dispatch_async_redirect_invoke + 628
> 41 libdispatch.dylib 0x0000000101a15dc8 _dispatch_root_queue_drain + 372
> 42 libdispatch.dylib 0x0000000101a167ac _dispatch_worker_thread2 + 156
> 43 libsystem_pthread.dylib 0x00000001ad9f51b4 _pthread_wqthread + 464
> 44 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:10:53.567764+0600 SynopiLive360[975:143540] [Assert] Cannot be called with asCopy = NO on non-main thread.
> stskhtkehy
> streamUrl111: empty
> streamKey111: empty
> btndisp111: [phone]
> btndisp111: 1234
> updateUi: empty
> isSuccessUi: false
> internetChanged: connected
> 2019-06-26 12:10:53.581584+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da64698c <redacted> + 788
> 3 UIKitCore 0x00000001da655ddc <redacted> + 1740
> 4 UIKitCore 0x00000001da644d54 <redacted> + 64
> 5 SynopiLive360 0x0000000100dc3d18 $s13SynopiLive36014SegueFromRightC7performyyF + 960
> 6 SynopiLive360 0x0000000100dc4564 $s13SynopiLive36014SegueFromRightC7performyyFTo + 40
> 7 UIKitCore 0x00000001da35d058 <redacted> + 292
> 8 UIKitCore 0x00000001da35cf04 <redacted> + 92
> 9 UIKitCore 0x00000001d9c2d3e4 <redacted> + 104
> 10 SynopiLive360 0x0000000100e2fc24 $s13SynopiLive36022LoggedInViewControllerC12updateUrlkey3url3keyySS_SStF
> + 3160
> 11 SynopiLive360 0x0000000100e29e60 $s13SynopiLive36022LoggedInViewControllerC19simpleGetUrlRequest3url5tokenySS_SStFy10Foundation4DataVSg_So13NSURLResponseCSgs5Error_pSgtcfU_
> + 1048
> 12 SynopiLive360 0x0000000100e29464 $s10Foundation4DataVSgSo13NSURLResponseCSgs5Error_pSgIegggg_So6NSDataCSgAGSo7NSErrorCSgIeyByyy_TR
> + 284
> 13 CFNetwork 0x00000001ae3a8688 <redacted> + 32
> 14 CFNetwork 0x00000001ae3bc220 <redacted> + 176
> 15 Foundation 0x00000001ae838f68 <redacted> + 16
> 16 Foundation 0x00000001ae745420 <redacted> + 72
> 17 Foundation 0x00000001ae744908 <redacted> + 740
> 18 Foundation 0x00000001ae83acec <redacted> + 272
> 19 libdispatch.dylib 0x0000000101a036f0 _dispatch_call_block_and_release + 24
> 20 libdispatch.dylib 0x0000000101a04c74 _dispatch_client_callout + 16
> 21 libdispatch.dylib 0x0000000101a07ffc _dispatch_continuation_pop + 524
> 22 libdispatch.dylib 0x0000000101a07458 _dispatch_async_redirect_invoke + 628
> 23 libdispatch.dylib 0x0000000101a15dc8 _dispatch_root_queue_drain + 372
> 24 libdispatch.dylib 0x0000000101a167ac _dispatch_worker_thread2 + 156
> 25 libsystem_pthread.dylib 0x00000001ad9f51b4 _pthread_wqthread + 464
> 26 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:10:53.587827+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da64698c <redacted> + 788
> 3 UIKitCore 0x00000001da655ddc <redacted> + 1740
> 4 SynopiLive360 0x0000000100e49e1c $sSo16UIViewControllerC13SynopiLive360E9grayColor6onViewySo0A0C_tF +
> 1064
> 5 SynopiLive360 0x0000000100e2fcf8 $s13SynopiLive36022LoggedInViewControllerC12updateUrlkey3url3keyySS_SStF
> + 3372
> 6 SynopiLive360 0x0000000100e29e60 $s13SynopiLive36022LoggedInViewControllerC19simpleGetUrlRequest3url5tokenySS_SStFy10Foundation4DataVSg_So13NSURLResponseCSgs5Error_pSgtcfU_
> + 1048
> 7 SynopiLive360 0x0000000100e29464 $s10Foundation4DataVSgSo13NSURLResponseCSgs5Error_pSgIegggg_So6NSDataCSgAGSo7NSErrorCSgIeyByyy_TR
> + 284
> 8 CFNetwork 0x00000001ae3a8688 <redacted> + 32
> 9 CFNetwork 0x00000001ae3bc220 <redacted> + 176
> 10 Foundation 0x00000001ae838f68 <redacted> + 16
> 11 Foundation 0x00000001ae745420 <redacted> + 72
> 12 Foundation 0x00000001ae744908 <redacted> + 740
> 13 Foundation 0x00000001ae83acec <redacted> + 272
> 14 libdispatch.dylib 0x0000000101a036f0 _dispatch_call_block_and_release + 24
> 15 libdispatch.dylib 0x0000000101a04c74 _dispatch_client_callout + 16
> 16 libdispatch.dylib 0x0000000101a07ffc _dispatch_continuation_pop + 524
> 17 libdispatch.dylib 0x0000000101a07458 _dispatch_async_redirect_invoke + 628
> 18 libdispatch.dylib 0x0000000101a15dc8 _dispatch_root_queue_drain + 372
> 19 libdispatch.dylib 0x0000000101a167ac _dispatch_worker_thread2 + 156
> 20 libsystem_pthread.dylib 0x00000001ad9f51b4 _pthread_wqthread + 464
> 21 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:10:53.592944+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da5a3308 <redacted> + 560
> 3 UIKitCore 0x00000001da5a3094 <redacted> + 220
> 4 UIKitCore 0x00000001da646a84 <redacted> + 120
> 5 Foundation 0x00000001ae74eb34 <redacted> + 108
> 6 UIKitCore 0x00000001da64698c <redacted> + 788
> 7 UIKitCore 0x00000001da655ddc <redacted> + 1740
> 8 SynopiLive360 0x0000000100e49e1c $sSo16UIViewControllerC13SynopiLive360E9grayColor6onViewySo0A0C_tF +
> 1064
> 9 SynopiLive360 0x0000000100e2fcf8 $s13SynopiLive36022LoggedInViewControllerC12updateUrlkey3url3keyySS_SStF
> + 3372
> 10 SynopiLive360 0x0000000100e29e60 $s13SynopiLive36022LoggedInViewControllerC19simpleGetUrlRequest3url5tokenySS_SStFy10Foundation4DataVSg_So13NSURLResponseCSgs5Error_pSgtcfU_
> + 1048
> 11 SynopiLive360 0x0000000100e29464 $s10Foundation4DataVSgSo13NSURLResponseCSgs5Error_pSgIegggg_So6NSDataCSgAGSo7NSErrorCSgIeyByyy_TR
> + 284
> 12 CFNetwork 0x00000001ae3a8688 <redacted> + 32
> 13 CFNetwork 0x00000001ae3bc220 <redacted> + 176
> 14 Foundation 0x00000001ae838f68 <redacted> + 16
> 15 Foundation 0x00000001ae745420 <redacted> + 72
> 16 Foundation 0x00000001ae744908 <redacted> + 740
> 17 Foundation 0x00000001ae83acec <redacted> + 272
> 18 libdispatch.dylib 0x0000000101a036f0 _dispatch_call_block_and_release + 24
> 19 libdispatch.dylib 0x0000000101a04c74 _dispatch_client_callout + 16
> 20 libdispatch.dylib 0x0000000101a07ffc _dispatch_continuation_pop + 524
> 21 libdispatch.dylib 0x0000000101a07458 _dispatch_async_redirect_invoke + 628
> 22 libdispatch.dylib 0x0000000101a15dc8 _dispatch_root_queue_drain + 372
> 23 libdispatch.dylib 0x0000000101a167ac _dispatch_worker_thread2 + 156
> 24 libsystem_pthread.dylib 0x00000001ad9f51b4 _pthread_wqthread + 464
> 25 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:10:55.243945+0600 SynopiLive360[975:143336] [LayoutConstraints] Unable to simultaneously satisfy constraints.
> Probably at least one of the constraints in the following list is one you don't want.
> Try this:
> (1) look at each constraint and try to figure out which you don't expect;
> (2) find the code that added the unwanted constraint or constraints and fix it.
> (
> "<NSLayoutConstraint:0x2837c0d70 UILabel:0x101cac270'Synopi Live 360'.width == 374 (active)>",
> "<NSLayoutConstraint:0x2837c10e0 UILayoutGuide:0x282dd9f80'UIViewSafeAreaLayoutGuide'.trailing ==
> UILabel:0x101cac270'Synopi Live 360'.trailing + 20 (active)>",
> "<NSLayoutConstraint:0x2837c0690 UILabel:0x101cac270'Synopi Live 360'.leading ==
> UILayoutGuide:0x282dd9f80'UIViewSafeAreaLayoutGuide'.leading + 20
> (active)>",
> "<NSLayoutConstraint:0x2837f8000 'UIView-Encapsulated-Layout-Width' UIView:0x101b22a50.width == 375
> (active)>",
> "<NSLayoutConstraint:0x2837c0b40 'UIViewSafeAreaLayoutGuide-left'
> H:|-(0)-[UILayoutGuide:0x282dd9f80'UIViewSafeAreaLayoutGuide'](LTR)
> (active, names: '|':UIView:0x101b22a50 )>",
> "<NSLayoutConstraint:0x2837c2ee0 'UIViewSafeAreaLayoutGuide-right'
> H:[UILayoutGuide:0x282dd9f80'UIViewSafeAreaLayoutGuide']-(0)-|(LTR)
> (active, names: '|':UIView:0x101b22a50 )>"
> )
>
> Will attempt to recover by breaking constraint
> <NSLayoutConstraint:0x2837c0d70 UILabel:0x101cac270'Synopi Live 360'.width == 374 (active)>
>
> Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
> The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
> 2019-06-26 12:12:20.716885+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da5a4fbc <redacted> + 92
> 3 UIKitCore 0x00000001da5a3acc <redacted> + 120
> 4 UIKitCore 0x00000001da5a4bdc <redacted> + 168
> 5 UIKitCore 0x00000001da595664 <redacted> + 96
> 6 UIKitCore 0x00000001da5a5a60 <redacted> + 416
> 7 UIKitCore 0x00000001da648878 <redacted> + 328
> 8 UIKitCore 0x00000001da65beb8 <redacted> + 1392
> 9 QuartzCore 0x00000001b22621f0 <redacted> + 184
> 10 QuartzCore 0x00000001b2267198 <redacted> + 332
> 11 QuartzCore 0x00000001b21ca0a8 <redacted> + 348
> 12 QuartzCore 0x00000001b21f8108 <redacted> + 640
> 13 QuartzCore 0x00000001b21f9288 <redacted> + 228
> 14 libsystem_pthread.dylib 0x00000001ad9f74b4 <redacted> + 580
> 15 libsystem_pthread.dylib 0x00000001ad9f4904 <redacted> + 80
> 16 libsystem_pthread.dylib 0x00000001ad9f5508 pthread_workqueue_setdispatchoffset_np + 0
> 17 libsystem_pthread.dylib 0x00000001ad9f514c _pthread_wqthread + 360
> 18 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:12:20.735424+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da5a4ae0 <redacted> + 120
> 3 UIKitCore 0x00000001da5a4780 <redacted> + 692
> 4 UIKitCore 0x00000001da5a4780 <redacted> + 692
> 5 Foundation 0x00000001ae74eb34 <redacted> + 108
> 6 UIKitCore 0x00000001da5a4fbc <redacted> + 92
> 7 UIKitCore 0x00000001da5a3acc <redacted> + 120
> 8 UIKitCore 0x00000001da5a4bdc <redacted> + 168
> 9 UIKitCore 0x00000001da595664 <redacted> + 96
> 10 UIKitCore 0x00000001da5a5a60 <redacted> + 416
> 11 UIKitCore 0x00000001da648878 <redacted> + 328
> 12 UIKitCore 0x00000001da65beb8 <redacted> + 1392
> 13 QuartzCore 0x00000001b22621f0 <redacted> + 184
> 14 QuartzCore 0x00000001b2267198 <redacted> + 332
> 15 QuartzCore 0x00000001b21ca0a8 <redacted> + 348
> 16 QuartzCore 0x00000001b21f8108 <redacted> + 640
> 17 QuartzCore 0x00000001b21f9288 <redacted> + 228
> 18 libsystem_pthread.dylib 0x00000001ad9f74b4 <redacted> + 580
> 19 libsystem_pthread.dylib 0x00000001ad9f4904 <redacted> + 80
> 20 libsystem_pthread.dylib 0x00000001ad9f5508 pthread_workqueue_setdispatchoffset_np + 0
> 21 libsystem_pthread.dylib 0x00000001ad9f514c _pthread_wqthread + 360
> 22 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:12:20.749133+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da5a4ae0 <redacted> + 120
> 3 UIKitCore 0x00000001da5a4780 <redacted> + 692
> 4 UIKitCore 0x00000001da5a4780 <redacted> + 692
> 5 Foundation 0x00000001ae74eb34 <redacted> + 108
> 6 UIKitCore 0x00000001da5a4fbc <redacted> + 92
> 7 UIKitCore 0x00000001da5a3acc <redacted> + 120
> 8 UIKitCore 0x00000001da5a4bdc <redacted> + 168
> 9 UIKitCore 0x00000001da595664 <redacted> + 96
> 10 UIKitCore 0x00000001da5a5a60 <redacted> + 416
> 11 UIKitCore 0x00000001da648878 <redacted> + 328
> 12 UIKitCore 0x00000001da65beb8 <redacted> + 1392
> 13 QuartzCore 0x00000001b22621f0 <redacted> + 184
> 14 QuartzCore 0x00000001b2267198 <redacted> + 332
> 15 QuartzCore 0x00000001b21ca0a8 <redacted> + 348
> 16 QuartzCore 0x00000001b21f8108 <redacted> + 640
> 17 QuartzCore 0x00000001b21f9288 <redacted> + 228
> 18 libsystem_pthread.dylib 0x00000001ad9f74b4 <redacted> + 580
> 19 libsystem_pthread.dylib 0x00000001ad9f4904 <redacted> + 80
> 20 libsystem_pthread.dylib 0x00000001ad9f5508 pthread_workqueue_setdispatchoffset_np + 0
> 21 libsystem_pthread.dylib 0x00000001ad9f514c _pthread_wqthread + 360
> 22 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:12:20.757334+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da64698c <redacted> + 788
> 3 UIKitCore 0x00000001da655ddc <redacted> + 1740
> 4 UIKitCore 0x00000001d9c796d4 <redacted> + 340
> 5 UIKitCore 0x00000001d9c787b0 <redacted> + 484
> 6 UIKitCore 0x00000001d9c78af4 <redacted> + 224
> 7 UIKitCore 0x00000001da65be54 <redacted> + 1292
> 8 QuartzCore 0x00000001b22621f0 <redacted> + 184
> 9 QuartzCore 0x00000001b2267198 <redacted> + 332
> 10 QuartzCore 0x00000001b21ca0a8 <redacted> + 348
> 11 QuartzCore 0x00000001b21f8108 <redacted> + 640
> 12 QuartzCore 0x00000001b21f9288 <redacted> + 228
> 13 libsystem_pthread.dylib 0x00000001ad9f74b4 <redacted> + 580
> 14 libsystem_pthread.dylib 0x00000001ad9f4904 <redacted> + 80
> 15 libsystem_pthread.dylib 0x00000001ad9f5508 pthread_workqueue_setdispatchoffset_np + 0
> 16 libsystem_pthread.dylib 0x00000001ad9f514c _pthread_wqthread + 360
> 17 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
> 2019-06-26 12:12:20.765234+0600 SynopiLive360[975:143540] 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 0x00000001ae943474 <redacted> + 96
> 1 Foundation 0x00000001ae74eaec <redacted> + 36
> 2 UIKitCore 0x00000001da5a3308 <redacted> + 560
> 3 UIKitCore 0x00000001da5a3094 <redacted> + 220
> 4 UIKitCore 0x00000001da646a84 <redacted> + 120
> 5 Foundation 0x00000001ae74eb34 <redacted> + 108
> 6 UIKitCore 0x00000001da64698c <redacted> + 788
> 7 UIKitCore 0x00000001da655ddc <redacted> + 1740
> 8 UIKitCore 0x00000001d9c796d4 <redacted> + 340
> 9 UIKitCore 0x00000001d9c787b0 <redacted> + 484
> 10 UIKitCore 0x00000001d9c78af4 <redacted> + 224
> 11 UIKitCore 0x00000001da65be54 <redacted> + 1292
> 12 QuartzCore 0x00000001b22621f0 <redacted> + 184
> 13 QuartzCore 0x00000001b2267198 <redacted> + 332
> 14 QuartzCore 0x00000001b21ca0a8 <redacted> + 348
> 15 QuartzCore 0x00000001b21f8108 <redacted> + 640
> 16 QuartzCore 0x00000001b21f9288 <redacted> + 228
> 17 libsystem_pthread.dylib 0x00000001ad9f74b4 <redacted> + 580
> 18 libsystem_pthread.dylib 0x00000001ad9f4904 <redacted> + 80
> 19 libsystem_pthread.dylib 0x00000001ad9f5508 pthread_workqueue_setdispatchoffset_np + 0
> 20 libsystem_pthread.dylib 0x00000001ad9f514c _pthread_wqthread + 360
> 21 libsystem_pthread.dylib 0x00000001ad9f7cd4 start_wqthread + 4
> )
help me please

Answer 1

You are invoking performSegue() on a thread that is not the main UI thread. You need to dispatch to the main thread to do this safely.