App crash when opening

[allenlinli]

Hi, I found the crash when I build up the project.
It seems a crash when PKHUD library.

System:
cocoapod: 1.3.1
Xcode 9.0, iOS 11.0

2017-09-29 17:14:48.651575+0800 iOS-Viper-Architecture[12446:199585] *** Assertion failure in -[PKHUD.FrameView _addSubview:positioned:relativeTo:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3694.4.18/UIVisualEffectView.m:1464
2017-09-29 17:14:48.659722+0800 iOS-Viper-Architecture[12446:199585] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '<PKHUD.PKHUDProgressView: 0x7fc55a0103f0; frame = (0 0; 156 156); clipsToBounds = YES; alpha = 0.85; layer = <CALayer: 0x60c0000302a0>> has been added as a subview to <PKHUD.FrameView: 0x7fc55a00dea0; baseClass = UIVisualEffectView; frame = (0 0; 156 156); clipsToBounds = YES; autoresize = LM+RM+TM+BM; layer = <CALayer: 0x600000028b80>>. Do not add subviews directly to the visual effect view itself, instead add them to the -contentView.'
*** First throw call stack:
(
	0   CoreFoundation                      0x000000011400a1cb __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x00000001100c7f41 objc_exception_throw + 48
	2   CoreFoundation                      0x000000011400f362 +[NSException raise:format:arguments:] + 98
	3   Foundation                          0x000000010fb6c089 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 193
	4   UIKit                               0x00000001111cb43f -[UIVisualEffectView _addSubview:positioned:relativeTo:] + 379
	5   PKHUD                               0x000000010fa495a6 _T05PKHUD9FrameViewC7contentSo6UIViewCfs + 518
	6   PKHUD                               0x000000010fa5052c _T05PKHUDAAC11contentViewSo6UIViewCfs + 300
	7   PKHUD                               0x000000010fa4b964 _T05PKHUD3HUDC4showyAA14HUDContentTypeO_So6UIViewCSg6onViewtFZ + 484
	8   iOS-Viper-Architecture              0x000000010f401df0 _T022iOS_Viper_Architecture12PostListViewC11showLoadingyyF + 112
	9   iOS-Viper-Architecture              0x000000010f401e24 _T022iOS_Viper_Architecture12PostListViewC11showLoadingyyFTo + 36
	10  iOS-Viper-Architecture              0x000000010f402108 _T022iOS_Viper_Architecture12PostListViewC11showLoadingyyFTD + 40
	11  iOS-Viper-Architecture              0x000000010f4020d9 _T022iOS_Viper_Architecture12PostListViewCAA0deF8ProtocolA2aDP11showLoadingyyFTW + 9
	12  iOS-Viper-Architecture              0x000000010f405c89 _T022iOS_Viper_Architecture17PostListPresenterC11viewDidLoadyyF + 137
	13  iOS-Viper-Architecture              0x000000010f4066e1 _T022iOS_Viper_Architecture17PostListPresenterCAA0deF8ProtocolA2aDP11viewDidLoadyyFTW + 49
	14  iOS-Viper-Architecture              0x000000010f4010aa _T022iOS_Viper_Architecture12PostListViewC11viewDidLoadyyF + 218
	15  iOS-Viper-Architecture              0x000000010f401284 _T022iOS_Viper_Architecture12PostListViewC11viewDidLoadyyFTo + 36
	16  UIKit                               0x0000000110d7bd51 -[UIViewController loadViewIfRequired] + 1235
	17  UIKit                               0x0000000110dc34dc -[UINavigationController _updateScrollViewFromViewController:toViewController:] + 68
	18  UIKit                               0x0000000110dc3818 -[UINavigationController _startTransition:fromViewController:toViewController:] + 153
	19  UIKit                               0x0000000110dc492f -[UINavigationController _startDeferredTransitionIfNeeded:] + 841
	20  UIKit                               0x0000000110dc5b90 -[UINavigationController __viewWillLayoutSubviews] + 115
	21  UIKit                               0x000000011101c2ae -[UILayoutContainerView layoutSubviews] + 231
	22  UIKit                               0x0000000110cac551 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1331
	23  QuartzCore                          0x000000011a4314ba -[CALayer layoutSublayers] + 153
	24  QuartzCore                          0x000000011a4355a9 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 401
	25  QuartzCore                          0x000000011a3be1cd _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 365
	26  QuartzCore                          0x000000011a3e9ae4 _ZN2CA11Transaction6commitEv + 500
	27  UIKit                               0x0000000110bf9706 __34-[UIApplication _firstCommitBlock]_block_invoke_2 + 141
	28  CoreFoundation                      0x0000000113fad20c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
	29  CoreFoundation                      0x0000000113f91a3b __CFRunLoopDoBlocks + 203
	30  CoreFoundation                      0x0000000113f91214 __CFRunLoopRun + 1300
	31  CoreFoundation                      0x0000000113f90a89 CFRunLoopRunSpecific + 409
	32  GraphicsServices                    0x0000000118ebe9c6 GSEventRunModal + 62
	33  UIKit                               0x0000000110bddd30 UIApplicationMain + 159
	34  iOS-Viper-Architecture              0x000000010f40ce07 main + 55
	35  libdyld.dylib                       0x0000000115110d81 start + 1
	36  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)