when I run this project,It crashed in AppDelegate.swift at "class AppDelegate: UIResponder, UIApplicationDelegate"
error message :
Optional(<UIButton: 0x7ff76e51d090; frame = (0 0; 49 42); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x6000008b5140>>)
2019-04-06 13:33:16.057133+0800 IRIS iOS[86863:2645289] -[UIView setConstant:]: unrecognized selector sent to instance 0x7ff76e700a50
2019-04-06 13:33:16.063175+0800 IRIS iOS[86863:2645289] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView setConstant:]: unrecognized selector sent to instance 0x7ff76e700a50'
*** First throw call stack:
(
0 CoreFoundation 0x00000001089b46fb __exceptionPreprocess + 331
1 libobjc.A.dylib 0x0000000107f58ac5 objc_exception_throw + 48
2 CoreFoundation 0x00000001089d2ab4 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 UIKitCore 0x0000000113e42c3d -[UIResponder doesNotRecognizeSelector:] + 287
4 CoreFoundation 0x00000001089b9443 ___forwarding___ + 1443
5 CoreFoundation 0x00000001089bb238 _CF_forwarding_prep_0 + 120
6 IRIS iOS 0x00000001074f2f1a $s8IRIS_iOS20SecondViewControllerC12isProcessingSbvW + 1418
7 IRIS iOS 0x00000001074f34c2 $s8IRIS_iOS20SecondViewControllerC12isProcessingSbvs + 274
8 IRIS iOS 0x00000001074f3637 $s8IRIS_iOS20SecondViewControllerC11viewDidLoadyyF + 151
9 IRIS iOS 0x00000001074f3844 $s8IRIS_iOS20SecondViewControllerC11viewDidLoadyyFTo + 36
10 UIKitCore 0x000000011381443b -[UIViewController loadViewIfRequired] + 1183
11 UIKitCore 0x0000000113814868 -[UIViewController view] + 27
12 UIKitCore 0x0000000113e4cc33 -[UIWindow addRootViewControllerViewIfPossible] + 122
13 UIKitCore 0x0000000113e4d327 -[UIWindow _setHidden:forced:] + 289
14 UIKitCore 0x0000000113e5ff86 -[UIWindow makeKeyAndVisible] + 42
15 UIKitCore 0x0000000113e0ff1c -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4555
16 UIKitCore 0x0000000113e150c6 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1617
17 UIKitCore 0x000000011365a6d6 __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 904
18 UIKitCore 0x0000000113662fce +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
19 UIKitCore 0x000000011365a2ec -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 236
20 UIKitCore 0x000000011365ac48 -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 1091
21 UIKitCore 0x0000000113658fba __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 782
22 UIKitCore 0x0000000113658c71 -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 433
23 UIKitCore 0x000000011365d9b6 __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 576
24 UIKitCore 0x000000011365e610 _performActionsWithDelayForTransitionContext + 100
25 UIKitCore 0x000000011365d71d -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 223
26 UIKitCore 0x00000001136626d0 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
27 UIKitCore 0x0000000113e139a8 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 514
28 UIKitCore 0x00000001139cadfa -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
29 FrontBoardServices 0x0000000112b4b125 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 448
30 FrontBoardServices 0x0000000112b54ed6 __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 283
31 FrontBoardServices 0x0000000112b54700 __40-[FBSWorkspace _performDelegateCallOut:]_block_invoke + 53
32 libdispatch.dylib 0x000000010c77adb5 _dispatch_client_callout + 8
33 libdispatch.dylib 0x000000010c77e2ba _dispatch_block_invoke_direct + 300
34 FrontBoardServices 0x0000000112b86146 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30
35 FrontBoardServices 0x0000000112b85dfe -[FBSSerialQueue _performNext] + 451
36 FrontBoardServices 0x0000000112b86393 -[FBSSerialQueue _performNextFromRunLoopSource] + 42
37 CoreFoundation 0x000000010891bbe1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
38 CoreFoundation 0x000000010891b463 __CFRunLoopDoSources0 + 243
39 CoreFoundation 0x0000000108915b1f __CFRunLoopRun + 1231
40 CoreFoundation 0x0000000108915302 CFRunLoopRunSpecific + 626
41 GraphicsServices 0x000000010f9a12fe GSEventRunModal + 65
42 UIKitCore 0x0000000113e16ba2 UIApplicationMain + 140
43 IRIS iOS 0x000000010751735b main + 75
44 libdyld.dylib 0x000000010c7ef541 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Can someone please explain this, or at least, tell me what I need to write to get it correct?
All suggestions would be great!
Thanks.
