第一次点击ListWidget的项目会引发错误？

Question

我想问你一个问题。当我点击listwidget的项目第一次，我看到有一些文本行应用程序的输出：

QPainter::begin: Paint device returned engine == 0, type: 3 
QPainter::setWorldTransform: Painter not active 
QPainter::worldTransform: Painter not active 
QPainter::setWorldTransform: Painter not active 
QPainter::setBrush: Painter not active 
QPainter::setRenderHint: Painter must be active to set rendering hints 
QPainter::setRenderHint: Painter must be active to set rendering hints 
QPainter::setClipping: Painter not active, state will be reset by begin 

它是一个错误？我该如何隐藏/禁用应用程序输出中的这些文本行？

Answer 1

这些是QT的警告消息。

你可能具有的图像原因类型== 3

检查了这一点为device types问题。