持之以恒

静态编译 QTextCodec::setCodecForLocale(QTextCodec::codecForLocale()); QTextCodec::setCodecForTr(QTextCodec::codecForLocale()); QTextCodec::setCodecForCStrings(QTextCodec::codecForLocale());

环境：Qt 4.7.4 1. 定义全局tou

void QWidget::setWindowState ( Qt::WindowStates windowState ) enum Qt::WindowState flags Qt::WindowStates This enum type is used to specify the current state of a top-level window. The state

错误:invalid use of incomplete type 'struct QGraphicsSceneMouseEvent' 错误:forward declaration of 'struct QGraphicsSceneMouseEvent'