我已经完成了下面的代码基本界面。当我单击开始按钮时，一个单词开始使用循环显示/隐藏。
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'gui.ui',
# licensing of 'gui.ui' applies.
#
# Created: Fri Feb 14 11:07:45 2020
# by: pyside2-uic running on PySide2 5.13.2
#
# WARNING! All changes made in this file will be lost!
from PySide2 import QtCore, QtGui, QtWidgets
import time
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(640, 480)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
spacerItem = QtWidgets.QSpacerItem(20, 117, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout.addItem(spacerItem, 0, 0, 1, 1)
self.label = QtWidgets.QLabel(self.centralwidget)
font = QtGui.QFont()
font.setPointSize(45)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.gridLayout.addWidget(self.label, 1, 0, 1, 1)
spacerItem1 = QtWidgets.QSpacerItem(20, 117, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
self.gridLayout.addItem(spacerItem1, 2, 0, 1, 1)
self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
self.horizontalLayout_4.setObjectName("horizontalLayout_4")
self.horizontalLayout = QtWidgets.QHBoxLayout()
self.horizontalLayout.setObjectName("horizontalLayout")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setObjectName("label_2")
self.horizontalLayout.addWidget(self.label_2)
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setObjectName("lineEdit")
self.horizontalLayout.addWidget(self.lineEdit)
self.horizontalLayout_4.addLayout(self.horizontalLayout)
self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.label_3 = QtWidgets.QLabel(self.centralwidget)
self.label_3.setObjectName("label_3")
self.horizontalLayout_2.addWidget(self.label_3)
self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit_2.setObjectName("lineEdit_2")
self.horizontalLayout_2.addWidget(self.lineEdit_2)
self.horizontalLayout_4.addLayout(self.horizontalLayout_2)
self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
self.horizontalLayout_3.setObjectName("horizontalLayout_3")
self.label_4 = QtWidgets.QLabel(self.centralwidget)
self.label_4.setObjectName("label_4")
self.horizontalLayout_3.addWidget(self.label_4)
self.lineEdit_3 = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit_3.setObjectName("lineEdit_3")
self.horizontalLayout_3.addWidget(self.lineEdit_3)
self.horizontalLayout_4.addLayout(self.horizontalLayout_3)
self.gridLayout.addLayout(self.horizontalLayout_4, 3, 0, 1, 1)
self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
self.horizontalLayout_5.setObjectName("horizontalLayout_5")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setObjectName("pushButton")
self.horizontalLayout_5.addWidget(self.pushButton)
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setObjectName("pushButton_2")
self.horizontalLayout_5.addWidget(self.pushButton_2)
self.gridLayout.addLayout(self.horizontalLayout_5, 4, 0, 1, 1)
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 640, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"), self.start)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(QtWidgets.QApplication.translate("MainWindow", "MainWindow", None, -1))
self.label.setText(QtWidgets.QApplication.translate("MainWindow", "Bonjour", None, -1))
self.label_2.setText(QtWidgets.QApplication.translate("MainWindow", "Mot", None, -1))
self.lineEdit.setText(QtWidgets.QApplication.translate("MainWindow", "Bonjour", None, -1))
self.label_3.setText(QtWidgets.QApplication.translate("MainWindow", "Temps ON (s)", None, -1))
self.lineEdit_2.setText(QtWidgets.QApplication.translate("MainWindow", "1", None, -1))
self.label_4.setText(QtWidgets.QApplication.translate("MainWindow", "Temps OFF (s)", None, -1))
self.lineEdit_3.setText(QtWidgets.QApplication.translate("MainWindow", "1", None, -1))
self.pushButton.setText(QtWidgets.QApplication.translate("MainWindow", "Start", None, -1))
self.pushButton_2.setText(QtWidgets.QApplication.translate("MainWindow", "Stop", None, -1))
def start(self):
mot = self.lineEdit.text()
print(mot)
temps_on = float(self.lineEdit_2.text())
temps_off = float(self.lineEdit_3.text())
stop = 0
while True:
self.label.setText(mot)
time.sleep(temps_on)
QtGui.qApp.processEvents()
self.label.setText('')
time.sleep(temps_off)
QtGui.qApp.processEvents()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
但是当我单击停止按钮时，我想停止循环。关于如何做到这一点的任何想法？
我知道通常不将功能直接集成到gui文件中，但是在这里并不重要。
在GUI中，您不应使用sleep，因为它会阻塞GUI，通常，如果要延迟，则正确的方法是使用QTimer。另一方面，如果要从GUI获取数值，最好考虑使用已实现了以下解决方案：
from PySide2 import QtCore, QtGui, QtWidgets
class Timer(QtCore.QObject):
timeout = QtCore.Signal(bool)
def __init__(self, parent=None):
super().__init__(parent)
self._time_on = 1000
self._time_off = 1000
self._state = False
self._is_running = False
self._timer = QtCore.QTimer(singleShot=True, timeout=self._on_timeout)
@property
def state(self):
return self._state
@property
def time_on(self):
return self._time_on
@time_on.setter
def time_on(self, time):
self._time_on = time
@property
def time_off(self):
return self._time_off
@time_off.setter
def time_off(self, time):
self._time_off = time
def start(self):
self._state = True
self._on_timeout()
def stop(self):
self._timer.stop()
def _on_timeout(self):
self.timeout.emit(self.state)
self._timer.start(self.time_on if self.state else self.time_off)
self._state = not self._state
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super().__init__(parent)
self.label = QtWidgets.QLabel()
self.lineedit = QtWidgets.QLineEdit(text="Bonjour")
self.on_spinbox = QtWidgets.QDoubleSpinBox(minimum=0)
self.off_spinbox = QtWidgets.QDoubleSpinBox(minimum=0)
self.start_button = QtWidgets.QPushButton("Start")
self.stop_button = QtWidgets.QPushButton("Stop")
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
lay = QtWidgets.QGridLayout(central_widget)
lay.addWidget(self.label, 0, 0, 1, 6)
lay.addWidget(QtWidgets.QLabel("Mot"), 1, 0)
lay.addWidget(self.lineedit, 1, 1)
lay.addWidget(QtWidgets.QLabel("Temps ON (s)"), 1, 2)
lay.addWidget(self.on_spinbox, 1, 3)
lay.addWidget(QtWidgets.QLabel("Temps OFF (s)"), 1, 4)
lay.addWidget(self.off_spinbox, 1, 5)
hlay = QtWidgets.QHBoxLayout()
hlay.addWidget(self.start_button)
hlay.addWidget(self.stop_button)
lay.addLayout(hlay, 2, 0, 1, 6)
self.resize(640, 480)
font = QtGui.QFont()
font.setPointSize(45)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.start_button.clicked.connect(self.start)
self.stop_button.clicked.connect(self.stop)
self.timer = Timer()
self.timer.timeout.connect(self.onTimeout)
@QtCore.Slot()
def start(self):
self.timer.time_on = 1000 * self.on_spinbox.value()
self.timer.time_off = 1000 * self.off_spinbox.value()
self.timer.start()
@QtCore.Slot()
def stop(self):
self.timer.stop()
@QtCore.Slot(bool)
def onTimeout(self, state):
if state:
self.label.setText(self.lineedit.text())
else:
self.label.clear()
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())