[LayoutConstraints] Unable to simultaneously satisfy constraints.
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
1.在Symbol后的输入框处填入UIViewAlertForUnsatisfiableConstraints标志
2.在action里面添加调试命令
Obj-C project
po [[UIWindow keyWindow] _autolayoutTrace]
Swift project
expr -l objc++ -O -- [[UIWindow keyWindow] _autolayoutTrace]