一、思路
1、Qt打开关闭文件用到QFile,包含头文件#include <QFile>
2、文件的读写用标准QTextStream，包含头文件#include <QTextStream>
二、具体实现
//打开fileQFile file(ui->lineEdit_filepath->text());if(!file.open(QIODevice::ReadWrite | QIODevice::Text)){ui->textEdit->append("读取文件失败");}//清空该文本文件内容file.remove();if(!file.open(QIODevice::WriteOnly | QIODevice::Text)){ui->textEdit->append("读取文件失败");}file.close();if(!file.open(QIODevice::ReadWrite | QIODevice::Text)){ui->textEdit->append("读取文件失败");}//用QTextStream进行读写QTextStream in(&file);in<<ui->textEdit_code->toPlainText()<<"\n";file.close();
)
