我正在使用Qt库编写C++程序。我的主目录bin文件夹中有一个符号链接指向可执行文件。我希望程序的当前工作目录是终端所在的目录(即
pwd
命令的结果)。我看到了QDir::currentPath()
函数,但它返回的是二进制文件所在的目录。如何找到我的当前工作目录呢?刚刚测试了一下,QDir::currentPath()
确实返回了我调用可执行文件的路径。
而且一个符号链接并不存在。如果你从该路径执行一个exe文件,那么实际上是从符号链接指向的路径执行它。
你尝试过使用QCoreApplication::applicationDirPath()吗?
qDebug() << "App path : " << qApp->applicationDirPath();
补充KaZ的回答,每当我制作QML应用程序时,我倾向于将此添加到主要的C++文件中
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QStandardPaths>
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
// get the applications dir path and expose it to QML
QUrl appPath(QString("%1").arg(app.applicationDirPath()));
engine.rootContext()->setContextProperty("appPath", appPath);
// Get the QStandardPaths home location and expose it to QML
QUrl userPath;
const QStringList usersLocation = QStandardPaths::standardLocations(QStandardPaths::HomeLocation);
if (usersLocation.isEmpty())
userPath = appPath.resolved(QUrl("/home/"));
else
userPath = QString("%1").arg(usersLocation.first());
engine.rootContext()->setContextProperty("userPath", userPath);
QUrl imagePath;
const QStringList picturesLocation = QStandardPaths::standardLocations(QStandardPaths::PicturesLocation);
if (picturesLocation.isEmpty())
imagePath = appPath.resolved(QUrl("images"));
else
imagePath = QString("%1").arg(picturesLocation.first());
engine.rootContext()->setContextProperty("imagePath", imagePath);
QUrl videoPath;
const QStringList moviesLocation = QStandardPaths::standardLocations(QStandardPaths::MoviesLocation);
if (moviesLocation.isEmpty())
videoPath = appPath.resolved(QUrl("./"));
else
videoPath = QString("%1").arg(moviesLocation.first());
engine.rootContext()->setContextProperty("videoPath", videoPath);
QUrl homePath;
const QStringList homesLocation = QStandardPaths::standardLocations(QStandardPaths::HomeLocation);
if (homesLocation.isEmpty())
homePath = appPath.resolved(QUrl("/"));
else
homePath = QString("%1").arg(homesLocation.first());
engine.rootContext()->setContextProperty("homePath", homePath);
QUrl desktopPath;
const QStringList desktopsLocation = QStandardPaths::standardLocations(QStandardPaths::DesktopLocation);
if (desktopsLocation.isEmpty())
desktopPath = appPath.resolved(QUrl("/"));
else
desktopPath = QString("%1").arg(desktopsLocation.first());
engine.rootContext()->setContextProperty("desktopPath", desktopPath);
QUrl docPath;
const QStringList docsLocation = QStandardPaths::standardLocations(QStandardPaths::DocumentsLocation);
if (docsLocation.isEmpty())
docPath = appPath.resolved(QUrl("/"));
else
docPath = QString("%1").arg(docsLocation.first());
engine.rootContext()->setContextProperty("docPath", docPath);
QUrl tempPath;
const QStringList tempsLocation = QStandardPaths::standardLocations(QStandardPaths::TempLocation);
if (tempsLocation.isEmpty())
tempPath = appPath.resolved(QUrl("/"));
else
tempPath = QString("%1").arg(tempsLocation.first());
engine.rootContext()->setContextProperty("tempPath", tempPath);
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
return app.exec();
}
在QML中使用它
....
........
............
Text{
text:"This is the applications path: " + appPath
+ "\nThis is the users home directory: " + homePath
+ "\nThis is the Desktop path: " desktopPath;
}
感谢RedX和Kaz的回答。我不明白为什么它会给出exe文件的路径。我找到了另一种方法来做这件事:
QString pwd("");
char * PWD;
PWD = getenv ("PWD");
pwd.append(PWD);
cout << "Working directory : " << pwd << flush;
它不如单行代码那样优雅...但对我来说有效。
// using where a relative filename will end up
QFileInfo fi("temp");
cout << fi.absolutePath() << endl;
// explicitly using the relative name of the current working directory
QDir dir(".");
cout << dir.absolutePath() << endl;
QDir dir; Cout << dir.absolutePath() << flush;
返回可执行文件所在的目录。 - Geoffroy