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paintEngine

QT之QWidget::paintEngine: Should no longer be called的解决办法

这个还是以前遇到的，今天突然想起来，就决定重现一下当初的错误，以及错误的代码。 报错是这个样子的： QWidget::paintEngine: Should no longer be called QPainter::begin: Paint device returned engine == 0, ......
paintEngine QWidget 办法 Should longer

解决QWidget::paintEngine: Should no longer be called QPainter::begin: Paint device returned engine

标题问题同时在运行后会附带以下问题： QPainter::setPen: Painter not activeQPainter::font: Painter not activeQPainter::setFont: Painter not active 或 QWidget::paintEngine: ......
paintEngine QPainter returned QWidget Should
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