Qt学习笔记（QFile）

最新推荐文章于 2025-04-14 21:05:55 发布

塞外听雪

最新推荐文章于 2025-04-14 21:05:55 发布

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分类专栏： Qt 文章标签： qt

本文链接：https://blog.youkuaiyun.com/qq_42754132/article/details/99700040

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文件操作
基础课以文件操作结尾
QFile
无非就是读和写操作
QFile file("路径")
file.open 打开方式 QIODevice::ReadOnly
file.readAll readLine( file.atEnd 判断是否到文件尾)

写 QIODevice::WriteOnly 全覆盖
追加Append
file.wirte("...")

QFileInfo info("路径")
file 读取到文件信息
路径名称后缀名大小
创建日期修改日期 QDateTIme toString("yyyy-MM-dd.....")

文件流
QFileStream
QFile file（path)
QTextStream (&file)
stream<<写
stream.readAll >>遇到空格结束

数据流
QDataStream stream(&file)
stream<<写数据
stream>>读数据>>读数据

#-------------------------------------------------
#
# Project created by QtCreator 2019-08-17T17:38:01
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QFile
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_B

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