QSpinBox and setStylesheet problem

[Ace-X]

Hi all,

Can anyone explain why QSpinBox hides its up-down buttons when I try to change its border width by the following code:

QSpinBox* spinBox=new QSpinBox();
spinBox->setStyleSheet("*{border:1px solid black}");

QSpinBox* spinBox=new QSpinBox();
spinBox->setStyleSheet("*{border:1px solid black}");

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Thanks!