Qt中获得应用程序绝对路径的方法

一、有时候做项目使用应用程序的绝对路径可能更安全一点，使用绝对路径的方法有两种：1、使用QCoreApplication提供的几个静态函数。2、使用main函数中的argv[0]+QDir。

二、代码：

#include "mainwindow.h"
#include <QApplication>
#include <QVBoxLayout>
#include <QPushButton>
#include <QStringList>
#include <QDebug>
#include <QDir>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    QWidget *pWidget = new QWidget;
    w.setCentralWidget(pWidget);
    QVBoxLayout *pVBoxLayout = new QVBoxLayout;
    QString applicationDirPathStr = QCoreApplication::applicationDirPath();
    QString applicationFilePathStr = QCoreApplication::applicationFilePath();
    QString applicationNameStr = QCoreApplication::applicationName();
    qDebug() << "applicationDirPathStr: " << applicationDirPathStr << "applicationFilePathStr: "
                << applicationFilePathStr << "applicationNameStr: " << applicationNameStr;
    QStringList tempList;
    tempList.append("applicationDirPathStr:"+applicationDirPathStr);
    tempList.append("applicationFilePathStr:"+applicationFilePathStr);
    tempList.append("applicationFilePathStr:"+applicationFilePathStr);

    QString appPath = argv[0];
    QDir appDir(appPath);
    QString appName = appDir.dirName();
    QString exePath = appPath.left(appPath.length()-appName.length());
    qDebug() << "appPath: " << appPath << "appName: " << appName << "exePath: " << exePath;

    tempList.append("appPath:"+appPath);
    tempList.append("appName:"+appName);
    tempList.append("exePath:"+exePath);

    foreach(QString str,tempList)
    {
        QPushButton *pushBtn = new QPushButton(str);
        pVBoxLayout->addWidget(pushBtn);
    }
    pWidget->setLayout(pVBoxLayout);

    w.show();
    return a.exec();
}

三、运行效果