QMainWindow

I create a widget which inherit QMainWindow,if I

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show()

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it,the program will break down,but if I add

Code:

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QMessageBox::warning()

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before

Code:

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show(),

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the program will run norally.
Why?

what do you mean by break down? it crashes? or it simply terminates?.. for the later case see if you have QApplicaion::exe() called at the end of main...

can you produce a minimal compilable program reproducing the problem?

It is solved,thk u.