Some problems in qt compilation

[weisha]

I add “ QT_CHARTS_USE_NAMESPACE” In the ui_xx.h file
but the compiler often deletes it automatically，and report an error
I don't know why,wish someone could help me

[Chris Kawa]

Hi, welcome to the forum.

ui_softstart.h is a file automatically generated from the softstart.ui visual editor file. You are not supposed to make any manual changes in these generated header files as they will be recreated every time the .ui file changes. Anything you edit there will be lost as you already noticed.

That macro you're adding should rather go in your source file where you're using QtCharts