Determine whether path is a folder, file, or does not exist

reference:

Qt: How to correctly determine whether a file or folder exists_qt determines whether a folder exists-CSDN Blog

Thank you very much for your article! ! ! 

experiment:

    //D:/aA:存在
    //D:/a:不存在
    //D:/1/1.txt：存在
    //D:/1/2.txt：不存在

    QFileInfo info("D:/aA");
    qDebug()<<info.isDir();
    QFileInfo info1("D:/a");
    qDebug()<<info1.isDir();
    QFileInfo info2("D:/1/1.txt");
    qDebug()<<info2.isFile();
    QFileInfo info3("D:/1/2.txt");
    qDebug()<<info3.isFile();

result:

true

false

true

false

Summarize: 

(1) I want to know whether the path exists, it doesn’t matter whether it is a file or a folder.

QFileInfo::exists()

(2) Want to know if path is a folder

QFileInfo::isDir()

(3) Want to know if path is a file

QFileInfo::isFile()