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並前往https://www.experts-exchange.com/questions/25360829/Setting-a-QT-lineedit-box-mask-to-not-allow-leading-0s-and-to-not-allow-spaces.html

Setting a QT lineedit box mask to not allow leading 0s, and to ...

The best way is to use QValidator or QIntValidator. And there your reimplement valide()virutual function the way you want your string to be ...

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