Generate moc_predefs.h
  Uic'ing mainwindow.ui...
  mainwindow.cpp
mainwindow.cpp(69): warning C4100: “event”: 未引用的形参
  animationstackedwidget.vcxproj -> C:\Users\owner\Desktop\QStackedWidget-Animation\debug\animationstackedwidget.exe
  animationstackedwidget.vcxproj -> debug\animationstackedwidget.pdb (Full PDB)