• QTextEdit 多行文本

#include "mainwindow.H"
#include <QApplication>
#include <QTextEdit>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTextEdit *textEdit;
    //实例 QTextEdit 控件
    textEdit = new QTextEdit();
    //控件位置大小
    textEdit->setGeometry(QRect(50,50,200,150));
    //内容
    textEdit->setText("我是第一行<br/>我是第二行");
    textEdit->show();
    return a.exec();
}

• QPlainTextEdit 多行文本

#include <QApplication>
#include <QPlainTextEdit>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QPlainTextEdit *plainTextEdit;
    //实例
    plainTextEdit = new QPlainTextEdit();
    //位置
    plainTextEdit->setGeometry(QRect(50,50,200,100));
    //添加内容
    plainTextEdit->setPlainText("第一行");
    plainTextEdit->show();
    return a.exec();
}