Snapkit Error type - 1

interfacebuilder의 constraints는 무시하고 했는데 이제 같이 고려해야 한다. 

캘린더, 메세지 뷰 등 오픈소스 땡겨서 넣고 나니 충돌 에러가 많네.

에러가 다음과 같은 양상을 띤다면, IB constratins와 snapkit 의 제약 사항을 함께 따져봐야 한다.

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.

2018-12-12 09:18:49.725504+0900 Bridge2[12529:869661] [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. 

(

    "<SnapKit.LayoutConstraint:0x282946400@TendencyCalendarPopUP.swift#140 UIButton:0x1036cba20.top == UILabel:0x1036cb730.bottom + 3.0>",

    "<SnapKit.LayoutConstraint:0x282947180@TendencyCalendarPopUP.swift#166 UILabel:0x1036ccf40.top == UILabel:0x1036cb730.bottom + 10.0>",

    "<SnapKit.LayoutConstraint:0x282947240@TendencyCalendarPopUP.swift#168 UILabel:0x1036ccf40.top == UIButton:0x1036cba20.bottom + 10.0>"

)

Will attempt to recover by breaking constraint 

<SnapKit.LayoutConstraint:0x282947240@TendencyCalendarPopUP.swift#168 UILabel:0x1036ccf40.top == UIButton:0x1036cba20.bottom + 10.0>

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.