设置Qt依赖库路径

void Util::registerPluginsDir(QDir &exeDir)
{
QString pluginsRelPath = "qtplugins";
QString platformsRelPath = "platforms";
QString sqlDriversRelPath = "sqldrivers";
QString imageformatsRelPath = "imageformats";

QString pluginsPath = exeDir.absoluteFilePath(pluginsRelPath);

QString platformsPath = QDir(pluginsPath).absoluteFilePath(platformsRelPath);
QString sqlDriversPath = QDir(pluginsPath).absoluteFilePath(sqlDriversRelPath);
QString imageformatsPath = QDir(pluginsPath).absoluteFilePath(imageformatsRelPath);

QStringList pathes = QCoreApplication::libraryPaths();
pathes << pluginsPath;
pathes << platformsPath;
pathes << sqlDriversPath;
pathes << imageformatsPath;
QCoreApplication::setLibraryPaths(pathes);
}