将Qt imports目录路径作为参数传递

来源：互联网发布：mac安装双系统win10 编辑：程序博客网时间：2024/06/16 09:01

我过去使用环境变量指定imports目录路径，在看过qmlscene的代码后，我能够将imports路径作为参数传递给我的程序。下面是我的完整代码：

#include <QtQml>#include <QtQuick/QQuickView>#include <QtCore/QString>#include <algorithm>#ifdef QT_WIDGETS_LIB#include <QtWidgets/QApplication>#else#include <QtGui/QGuiApplication>#endif#ifdef QT_WIDGETS_LIB#define Application QApplication#else#define Application QGuiApplication#endifQCoreApplication* createApplication(int & argc, char * argv[]) { for (int i = 1; i < argc; ++i) {  if (!qstrcmp(argv[i], "-no-gui")) {   return new QCoreApplication(argc, argv);  } } return new QApplication(argc, argv);}int main(int argc, char *argv[]){ if ((argc != 3) || qstrcmp(argv[1], "-I")) {  qWarning("Error: You must pass the location of plugins as one argument, e.g. -I ..\imports");  return -1; } QDir folder(argv[2]); QString imports_dir_path; if (!folder.exists()) {  QFileInfo info(argv[0]);    QDir dir(info.absoluteDir().absolutePath() + QDir::separator() + argv[2]);  imports_dir_path = dir.absolutePath();    if (!dir.exists()) {     QString err = "Error: The passed imports path is not a real folder, -I " + folder.absolutePath();   qWarning(err.toStdString().c_str());   return -1;  } } else {  imports_dir_path = folder.absolutePath(); }  QScopedPointer<QCoreApplication> app(createApplication(argc, argv)); if (qobject_cast<QApplication*>(app.data())) {  QQmlApplicationEngine engine;  engine.addImportPath(imports_dir_path);   engine.load(QUrl("qrc:/qmls/main.qml"));  QObject * topLevel = engine.rootObjects().value(0);  QQuickWindow * window = qobject_cast<QQuickWindow*>(topLevel);  if (!window) {   qWarning("Error: Your root item has to be a Window.");   return -1;  }  window->showMaximized();  return app->exec(); } else {   }}

核心是使用QQmlApplicationEngine::addImportPath方法。

为了支持相对路径，我首先测试传递进来的路径，如果目录不存在，则将当前进程的目录路径加上相对路径。

0 0