Qt读取xml文件

主要用到：QXmlStreamReader

头文件加入：

private:
    QLabel *resultL;
    QPushButton *readBtn;
private slots:
    void readNodeSlot();

构造函数加入：

    resultL = new QLabel(this);
    resultL->setGeometry(QRect(50, 50, 300, 100));
    //实例按钮
    readBtn = new QPushButton(this);
    readBtn->setText("读取title节点");
    readBtn->setGeometry(QRect(50, 180, 150, 25));
    connect(readBtn, &QPushButton::clicked, this, &MainWindow::readNodeSlot);

槽函数：

void MainWindow::readNodeSlot()
{
    QString xmlPath = "D:/a001.xml";
    QFile file(xmlPath);
    QString str;
    if(file.exists())
    {
        if(file.open(QIODevice::ReadOnly | QIODevice::Text))
        {
            QXmlStreamReader xmlRead(&file);
            //循环节点
            while(!xmlRead.atEnd())
            {
                //指针下移
                xmlRead.readNext();
                if(xmlRead.isStartElement())
                {
                    //如果节点有等于title的
                    if(xmlRead.name() == "title")
                    {
                        //取title值赋予变量str
                        str = xmlRead.readElementText();
                    }
                    else
                    {
                        str = "没找到节点";
                    }
                }
            }
            //将值绑定到QLabel控件显示
            resultL->setText(str);
        }
        else
        {
            resultL->setText("文件打开失败");
        }
        file.close();
    }
    else
    {
        resultL->setText("文件不存在");
    }
}