PyQt5:更新标签? [英] PyQt5: Updating Label?
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问题描述
我目前在持续更新标签时遇到问题，我尝试了不同的方法，但要么没有任何反应，要么程序停止工作.我在下面附上了我的代码的一部分.我也希望有人能准确解释 def retranslateUi(self, MainWindow) 的目的:
class Ui_MainWindow(object):def setupUi(self, MainWindow):MainWindow.setObjectName("Tom")MainWindow.setWindowModality(QtCore.Qt.NonModal)MainWindow.resize(800, 600)MainWindow.setAutoFillBackground(False)self.centralwidget = QtWidgets.QWidget(MainWindow)self.centralwidget.setObjectName("centralwidget")self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)self.verticalLayout.setObjectName("verticalLayout")self.Date = QtWidgets.QLabel(self.centralwidget)字体 = QtGui.QFont()font.setPointSize(18)self.Date.setFont(字体)self.Date.setAlignment(QtCore.Qt.AlignCenter)self.Date.setObjectName("日期")self.verticalLayout.addWidget(self.Date)self.Time = QtWidgets.QLabel(self.centralwidget)self.Time.setAlignment(QtCore.Qt.AlignCenter)self.Time.setObjectName("当前是" + datetime.strptime(d, "%H:%M:%S").strftime(" %I:%M:%S %p"))self.verticalLayout.addWidget(self.Time)self.Weather = QtWidgets.QLabel(self.centralwidget)self.Weather.setAlignment(QtCore.Qt.AlignCenter)self.Weather.setWordWrap(False)self.Weather.setObjectName("天气")self.verticalLayout.addWidget(self.Weather)intervalItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)self.verticalLayout.addItem(spacerItem)separatorItem1 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)self.verticalLayout.addItem(spacerItem1)separatorItem2 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)self.verticalLayout.addItem(spacerItem2)separatorItem3 = QtWidgets.QSpacerItem(771, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)self.verticalLayout.addItem(spacerItem3)separatorItem4 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)self.verticalLayout.addItem(spacerItem4)separatorItem5 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)self.verticalLayout.addItem(spacerItem5)MainWindow.setCentralWidget(self.centralwidget)self.retranslateUi(MainWindow)QtCore.QMetaObject.connectSlotsByName(MainWindow)def retranslateUi(self, MainWindow):_translate = QtCore.QCoreApplication.translateMainWindow.setWindowTitle(_translate("Tom", "Tom"))self.Date.setText(_translate("Tom", "今天是" + week_day +" + (ordinal(day)) + " of " + (month)))self.Time.setText(_translate("Tom", "目前是 " + datetime.strptime(d, "%H:%M:%S").strftime(" %I:%M:%S %p")))self.Weather.setText(_translate("Tom", "New York City" + str(ctemp) + "\xb0F " + string.capwords(status)))如果 __name__ == "__main__":导入系统app = QtWidgets.QApplication(sys.argv)MainWindow = QtWidgets.QMainWindow()ui = Ui_MainWindow()ui.setupUi(主窗口)MainWindow.show()sys.exit(app.exec_())我希望获取当前时间的标签不断更新，并且大约每 5 分钟调用一次天气 api.非常感谢任何帮助！
解决方案
为了实现代码，我们将执行以下操作:
- 我们使用计时器来更新时间.
- 为了获取天气数据，我们使用了
I'm currently having trouble updating labels continuously, I have tried my different ways but either nothing happens or the program stops working. I have attached below part of my code. Also I was hoping someone could explain exactly the purpose of def retranslateUi(self, MainWindow):
class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName("Tom") MainWindow.setWindowModality(QtCore.Qt.NonModal) MainWindow.resize(800, 600) MainWindow.setAutoFillBackground(False) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget) self.verticalLayout.setObjectName("verticalLayout") self.Date = QtWidgets.QLabel(self.centralwidget) font = QtGui.QFont() font.setPointSize(18) self.Date.setFont(font) self.Date.setAlignment(QtCore.Qt.AlignCenter) self.Date.setObjectName("Date") self.verticalLayout.addWidget(self.Date) self.Time = QtWidgets.QLabel(self.centralwidget) self.Time.setAlignment(QtCore.Qt.AlignCenter) self.Time.setObjectName("It is currently " + datetime.strptime(d, "%H:%M:%S").strftime( " %I:%M:%S %p")) self.verticalLayout.addWidget(self.Time) self.Weather = QtWidgets.QLabel(self.centralwidget) self.Weather.setAlignment(QtCore.Qt.AlignCenter) self.Weather.setWordWrap(False) self.Weather.setObjectName("Weather") self.verticalLayout.addWidget(self.Weather) spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem) spacerItem1 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem1) spacerItem2 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem2) spacerItem3 = QtWidgets.QSpacerItem(771, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem3) spacerItem4 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem4) spacerItem5 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem5) MainWindow.setCentralWidget(self.centralwidget) self.retranslateUi(MainWindow) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate("Tom", "Tom")) self.Date.setText(_translate("Tom", "Today is " + week_day +" the " + (ordinal(day)) + " of " + (month))) self.Time.setText(_translate("Tom", "It is currently " + datetime.strptime(d, "%H:%M:%S").strftime( " %I:%M:%S %p"))) self.Weather.setText(_translate("Tom", "New York City " + str(ctemp) + "\xb0F " + string.capwords(status))) 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_())I want the label that gets the current time to keep updating and the call to weather api to happen about every 5 min. Any help is greatly appreciated!
解决方案To implement the code we will do the following:
- To update the time we use a timer.
- To obtain the weather data, we use the pyowm library.
- The task of obtaining the weather can block the main thread of the GUI, therefore we will create a Thread.
- Within the thread we will create a signal that will store the weather information and connect it to the main thread via the updateTemp slot.
class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow): def __init__(self, parent=None): super(MainWindow, self).__init__(parent=parent) self.setupUi(self) timerTime = QtCore.QTimer(self) timerTime.timeout.connect(self.updateDate) timerTime.start(1000) self.pyowm = PyownThread(self) self.pyowm.tempSignal.connect(self.updateTemp) self.pyowm.start() def updateDate(self): date = QtCore.QDateTime.currentDateTime() self.Date.setText("Today is " + date.toString("ddd MMMM d yyyy")) self.Time.setText("It is currently " + date.toString("hh:mm:ss ap")) def updateTemp(self, temp): self.Weather.setText("New York City temperature:" + str(temp['temp']) + " \u00B0C")Thread:
class PyownThread(QtCore.QThread): tempSignal = QtCore.pyqtSignal(dict) def __init__(self, parent=None): super(PyownThread, self).__init__(parent=parent) self.owm = pyowm.OWM('1589dbcc0e9608e5b70f0ede23e757c8') def run(self): while True: observation = self.owm.weather_at_place('New York,us') w = observation.get_weather() ctemp = w.get_temperature('celsius') self.tempSignal.emit(ctemp) self.sleep(5*60)About the question: could explain exactly the purpose of def retranslateUi(self, MainWindow)?
This serves to make translatable into several languages, for example the same code could be used for an audience that speaks English, Spanish, German, etc. For your purposes it is not necessary.
Complete code:
from PyQt5 import QtWidgets, QtGui, QtCore import pyowm class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName("Tom") MainWindow.setWindowModality(QtCore.Qt.NonModal) MainWindow.resize(800, 600) MainWindow.setAutoFillBackground(False) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget) self.verticalLayout.setObjectName("verticalLayout") self.Date = QtWidgets.QLabel(self.centralwidget) font = QtGui.QFont() font.setPointSize(18) self.Date.setFont(font) self.Date.setAlignment(QtCore.Qt.AlignCenter) self.Date.setObjectName("Date") self.verticalLayout.addWidget(self.Date) self.Time = QtWidgets.QLabel(self.centralwidget) self.verticalLayout.addWidget(self.Time) self.Weather = QtWidgets.QLabel(self.centralwidget) self.Weather.setAlignment(QtCore.Qt.AlignCenter) self.Weather.setWordWrap(False) self.Weather.setObjectName("Weather") self.verticalLayout.addWidget(self.Weather) spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem) spacerItem1 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem1) spacerItem2 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem2) spacerItem3 = QtWidgets.QSpacerItem(771, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem3) spacerItem4 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem4) spacerItem5 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum) self.verticalLayout.addItem(spacerItem5) MainWindow.setCentralWidget(self.centralwidget) self.retranslateUi(MainWindow) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate("Tom", "Tom")) self.Date.setText(_translate("Tom", "Today is ")) self.Time.setText(_translate("Tom", "It is currently ")) self.Weather.setText(_translate("Tom", "New York City" )) class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow): def __init__(self, parent=None): super(MainWindow, self).__init__(parent=parent) self.setupUi(self) timerTime = QtCore.QTimer(self) timerTime.timeout.connect(self.updateDate) timerTime.start(1000) self.pyowm = PyownThread(self) self.pyowm.tempSignal.connect(self.updateTemp) self.pyowm.start() def updateDate(self): date = QtCore.QDateTime.currentDateTime() self.Date.setText("Today is " + date.toString("ddd MMMM d yyyy")) self.Time.setText("It is currently " + date.toString("hh:mm:ss ap")) def updateTemp(self, temp): self.Weather.setText("New York City temperature:" + str(temp['temp']) + " \u00B0C") class PyownThread(QtCore.QThread): tempSignal = QtCore.pyqtSignal(dict) def __init__(self, parent=None): super(PyownThread, self).__init__(parent=parent) self.owm = pyowm.OWM('1589dbcc0e9608e5b70f0ede23e757c8') def run(self): while True: observation = self.owm.weather_at_place('New York,us') w = observation.get_weather() ctemp = w.get_temperature('celsius') self.tempSignal.emit(ctemp) QtCore.QThread.sleep(5*60) if __name__ == "__main__": import sys app = QtWidgets.QApplication(sys.argv) w = MainWindow() w.show() sys.exit(app.exec_())这篇关于PyQt5:更新标签?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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