Qt - 使用QFile写文件

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 #include 
 4 #include 
 5 #include 
 6 
 7 MainWindow::MainWindow(QWidget *parent) :
 8     QMainWindow(parent),
 9     ui(new Ui::MainWindow)
10 {
11     ui->setupUi(this);
12 
13     QString filename = "1.txt";        //当前文件夹中
14     QString str = "Qt QFile Test...";  //保存的文本内容
15     QFile file(filename);
16     if(!file.open(QIODevice::ReadWrite|QIODevice::Text))
17     {
18         QMessageBox::warning(this,"file write","can't open",QMessageBox::Yes);
19 
20     }
21     QTextStream in(&file);
22     in<"\n";
23 
24 }
25 
26 MainWindow::~MainWindow()
27 {
28       file.close();   // 关闭file
29     delete ui;
30 }

在当前debug文件夹中会创建名为“1.txt”的文件

转载于:https://www.cnblogs.com/Pan-Z/p/6400122.html