self.numLabel=QLabel(self.tr("Download !"))
self.pbar = QProgressBar(self)
layout = QGridLayout()
layout.setSpacing(10)
layout.addWidget(self.numLabel, 1, 0)
layout.addWidget(self.pbar, 2, 0)
self.setLayout(layout)
self.setGeometry(500, 400, 400, 300)
self.center()
self.show()