qt杂录

列表查找

struct先重载==号

struct Department
    {
        int Id;
        QString Name;
        QString Telephone;
        QString Contacts;
        bool Department::operator==(const Department &rhs) const
        {
            return (Id == rhs.Id);
        }
    };

　　

用qFind查找：

Department userForFind;
    userForFind.Id=name.toInt();
    QVector<Department>::iterator it = qFind(DepartmentList.begin(), DepartmentList.end(), userForFind); // 查找

    if (it != DepartmentList.end()) // 找到了
    {
       ed->dp=*it;
    }

弹窗

QPushButton *okbtn = new QPushButton(QString::fromLocal8Bit("确定"));
    QPushButton *cancelbtn = new QPushButton(QString::fromLocal8Bit("取消"));
    QMessageBox *mymsgbox = new QMessageBox;

    mymsgbox->setIcon(QMessageBox::Warning);
    mymsgbox->setWindowTitle(QString::fromLocal8Bit("删除提示"));
    mymsgbox->setText(QString::fromLocal8Bit("是否确定删除该记录?"));
    mymsgbox->addButton(okbtn, QMessageBox::AcceptRole);
    mymsgbox->addButton(cancelbtn, QMessageBox::RejectRole);
    mymsgbox->show();
    mymsgbox->exec();//阻塞等待用户输入
    if (mymsgbox->clickedButton()==okbtn)//点击了OK按钮
    {
       //dosomething
    }　

界面事件

界面载入事件

void showEvent(QShowEvent *event);

　　界面退出不一定触发closeEvent事件，但一定会触发hideEvent事件

void hideEvent(QHideEvent *event);