내 뷰에는 세 개의 버튼이 있습니다. viewDidLoad ()에서 cornerRadus를 설정 한 후 : button.layer.cornerRadius = 20
로그에 다음 오류 메시지가 표시됩니다.
<Error>: CGContextSaveGState: invalid context 0x0.
If you want to see the backtrace, please set
CG_CONTEXT_SHOW_BACKTRACE environmental variable.
질문 :
CG_CONTEXT_SHOW_BACKTRACE 환경 변수를 어떻게 설정할 수 있습니까?- 또는이 경고를 어떻게 수정할 수 있습니까?
좋아요, 지금 메시지에서 역 추적을 받았습니다. 나에게는 말이되지 않습니다. 좀 도와주세요 ...
Aug 7 14:27:00 <Error>: CGContextSaveGState: invalid context 0x0. Backtrace:
<-[UIStatusBarItemView updateContentsAndWidth]+33>
<-[UIStatusBarItemView initWithItem:data:actions:style:]+477>
<+[UIStatusBarItemView createViewForItem:withData:actions:foregroundStyle:]+134>
<-[UIStatusBarLayoutManager _createViewForItem:withData:actions:]+163>
<-[UIStatusBarLayoutManager _prepareEnabledItemType:withEnabledItems:withData:actions:itemAppearing:itemDisappearing:]+36
<-[UIStatusBarLayoutManager prepareEnabledItems:withData:actions:]+92>
<-[UIStatusBarForegroundView _setStatusBarData:actions:animated:]+797>
<-[UIStatusBarForegroundView setStatusBarData:actions:animated:]+332>
<__51-[UIStatusBar _prepareToSetStyle:animation:forced:]_block_invoke+360>
<+[UIView(Animation) performWithoutAnimation:]+65>
<-[UIStatusBar _prepareToSetStyle:animation:forced:]+866>
<-[UIStatusBar _requestStyleAttributes:animationParameters:forced:]+391>
<-[UIStatusBar requestStyle:animationParameters:forced:]+437>
<-[UIStatusBar requestStyle:animated:forced:]+90>
<-[UIStatusBar _evaluateServerRegistration]+250>
<__45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke+590>
<-[UIView(Hierarchy) _postMovedFromSuperview:]+544>
<-[UIView(Internal) _addSubview:positioned:relativeTo:]+1967>
<-[UIStatusBarWindow setStatusBar:]+288>
<-[UIApplication _createStatusBarWithRequestedStyle:orientation:hidden:]+340>
<-[UIApplication _runWithMainScene:transitionContext:completion:]+950>
<-[UIApplication workspaceDidEndTransaction:]+188>
<-[FBSSerialQueue _performNext]+192>
<-[FBSSerialQueue _performNextFromRunLoopSource]+45>
<__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__+17>
<__CFRunLoopDoSources0+556>
<__CFRunLoopRun+867>
<CFRunLoopRunSpecific+488>
<-[UIApplication _run]+402>
<UIApplicationMain+171>
<main+117>
Aug 7 14:27:00 <Error>: CGContextTranslateCTM: invalid context 0x0. Backtrace:
<-[UIStatusBarItemView updateContentsAndWidth]+33>
<-[UIStatusBarItemView initWithItem:data:actions:style:]+477>
<+[UIStatusBarItemView createViewForItem:withData:actions:foregroundStyle:]+134>
<-[UIStatusBarLayoutManager _createViewForItem:withData:actions:]+163>
<-[UIStatusBarLayoutManager _prepareEnabledItemType:withEnabledItems:withData:actions:itemAppearing:itemDisappearing:]+36
<-[UIStatusBarLayoutManager prepareEnabledItems:withData:actions:]+92>
<-[UIStatusBarForegroundView _setStatusBarData:actions:animated:]+797>
<-[UIStatusBarForegroundView setStatusBarData:actions:animated:]+332>
<__51-[UIStatusBar _prepareToSetStyle:animation:forced:]_block_invoke+360>
<+[UIView(Animation) performWithoutAnimation:]+65>
<-[UIStatusBar _prepareToSetStyle:animation:forced:]+866>
<-[UIStatusBar _requestStyleAttributes:animationParameters:forced:]+391>
<-[UIStatusBar requestStyle:animationParameters:forced:]+437>
<-[UIStatusBar requestStyle:animated:forced:]+90>
<-[UIStatusBar _evaluateServerRegistration]+250>
<__45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke+590>
<-[UIView(Hierarchy) _postMovedFromSuperview:]+544>
<-[UIView(Internal) _addSubview:positioned:relativeTo:]+1967>
<-[UIStatusBarWindow setStatusBar:]+288>
<-[UIApplication _createStatusBarWithRequestedStyle:orientation:hidden:]+340>
<-[UIApplication _runWithMainScene:transitionContext:completion:]+950>
<-[UIApplication workspaceDidEndTransaction:]+188>
<-[FBSSerialQueue _performNext]+192>
<-[FBSSerialQueue _performNextFromRunLoopSource]+45>
<__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__+17>
<__CFRunLoopDoSources0+556>
<__CFRunLoopRun+867>
<CFRunLoopRunSpecific+488>
<-[UIApplication _run]+402>
<UIApplicationMain+171>
<main+117>
Aug 7 14:27:00 <Error>: CGContextRestoreGState: invalid context 0x0. Backtrace:
<-[UIStatusBarItemView updateContentsAndWidth]+33>
<-[UIStatusBarItemView initWithItem:data:actions:style:]+477>
<+[UIStatusBarItemView createViewForItem:withData:actions:foregroundStyle:]+134>
<-[UIStatusBarLayoutManager _createViewForItem:withData:actions:]+163>
<-[UIStatusBarLayoutManager _prepareEnabledItemType:withEnabledItems:withData:actions:itemAppearing:itemDisappearing:]+36
<-[UIStatusBarLayoutManager prepareEnabledItems:withData:actions:]+92>
<-[UIStatusBarForegroundView _setStatusBarData:actions:animated:]+797>
<-[UIStatusBarForegroundView setStatusBarData:actions:animated:]+332>
<__51-[UIStatusBar _prepareToSetStyle:animation:forced:]_block_invoke+360>
<+[UIView(Animation) performWithoutAnimation:]+65>
<-[UIStatusBar _prepareToSetStyle:animation:forced:]+866>
<-[UIStatusBar _requestStyleAttributes:animationParameters:forced:]+391>
<-[UIStatusBar requestStyle:animationParameters:forced:]+437>
<-[UIStatusBar requestStyle:animated:forced:]+90>
<-[UIStatusBar _evaluateServerRegistration]+250>
<__45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke+590>
<-[UIView(Hierarchy) _postMovedFromSuperview:]+544>
<-[UIView(Internal) _addSubview:positioned:relativeTo:]+1967>
<-[UIStatusBarWindow setStatusBar:]+288>
<-[UIApplication _createStatusBarWithRequestedStyle:orientation:hidden:]+340>
<-[UIApplication _runWithMainScene:transitionContext:completion:]+950>
<-[UIApplication workspaceDidEndTransaction:]+188>
<-[FBSSerialQueue _performNext]+192>
<-[FBSSerialQueue _performNextFromRunLoopSource]+45>
<__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__+17>
<__CFRunLoopDoSources0+556>
<__CFRunLoopRun+867>
<CFRunLoopRunSpecific+488>
<-[UIApplication _run]+402>
<UIApplicationMain+171>
<main+117>