"Original" A few wrong workarounds for QT Creator compiler program

1.MAINWINDOW.OBJ:-1:ERROR:LNK2019: unresolved external symbol "Public: __thiscall Qwtplot::qwtplot (class Qwidget *)" ([email protected] @[email protected]@@@z), the symbol in the function "Public:void __thiscall ui_mainwindow::setupui such an error:

WORKAROUND: 1. Execute the Create---"Execution qmake

2. Without adding the corresponding external library, the method of adding the library is to right-click within the project Pro file, select Add Library in the popup window, follow the instructions.

"Original" A few wrong workarounds for QT Creator compiler program