1.使用代码设置渐变
QLinearGradient linearGrad(QPointF(0, 0), QPointF(200, 200));linearGrad.setColorAt(0, Qt::blue);linearGrad.setColorAt(1, Qt::white);linearGrad.setCoordinateMode(QGradient::StretchToDeviceMode);QBrush brush(linearGrad);item1->setBackground(brush);
2.QPixmap图片的缩放
Qsize picSize(600,400);//将pixmap缩放成picSize大小然后保存在scaledPixmap中按比例缩放:QPixmap scaledPixmap = pixmap.scaled(picSize, Qt::KeepAspectRatio);不按照比例缩放QPixmap scaledPixmap = pixmap.scaled(picSize);
3.设置窗口不在任务栏显示并置顶
setWindowFlags(Qt::Tool | Qt::X11BypassWindowManagerHint | Qt::WindowStaysOnTopHint);
4.QLineEdit去掉右键菜单
_ui->_passwordEdit->setContextMenuPolicy(Qt::NoContextMenu);//去掉右键菜单
5.去除QString中的空格
QString str = " lots\t of\nwhitespace\r\n "; str = str.trimmed(); // str == "lots\t of\nwhitespace" QString str = " lots\t of\nwhitespace\r\n "; str = str.simplified(); // str == "lots of whitespace";
6.QLabel实现超链接
ui->_userWebConnect->setOpenExternalLinks(true);ui->_userWebConnect->setText("<a href = \"http://zkuyun.com/\>显示的内容</a>");
7.QTreeView去掉父节点的下拉
treeView->setRootIsDecorated(false);// UI控件里,在右边的设置属性里找到 QTreeView那栏,将rootIs Decorated 复选框,不要勾选
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