Question

我正在使用python 3和pyqt5创建一个简单的计时器，一旦完成就会响铃。对于计时器，我刚刚创建了一个休眠一秒的循环。根据我的理解，我需要使用线程来使用循环并让循环更新UI而不会冻结直到循环完成。

我遇到的问题是一旦循环完成，我希望我的函数调用另一个在不同线程中的类。我已经尝试过使用QThread和线程，似乎无法解决如何使循环调用从不同的线程调用类。

import sys, time, threading
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtMultimedia import QSound

# setting up the UI
class Ui_Form(QtWidgets.QWidget):

    def __init__(self):
        super().__init__()

        self.setupUi(self)

    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(303, 227)
        self.setWorkTxt = QtWidgets.QPlainTextEdit(Form)
        self.setWorkTxt.setGeometry(QtCore.QRect(10, 150, 141, 31))
        self.setWorkTxt.setObjectName("setWorkTxt")
        self.pushButton = QtWidgets.QPushButton(Form)
        self.pushButton.setGeometry(QtCore.QRect(10, 190, 141, 27))
        self.pushButton.setObjectName("pushButton")
        self.countDownTimer = QtWidgets.QLCDNumber(Form)
        self.countDownTimer.setGeometry(QtCore.QRect(13, 52, 281, 91))
        self.countDownTimer.setProperty("intValue", 0)
        self.countDownTimer.setObjectName("countDownTimer")
        self.retranslateUi(Form)

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Timer"))
        self.setWorkTxt.setPlainText(_translate("Form", "enter time"))
        self.pushButton.setText(_translate("Form", "Start"))
        self.pushButton.clicked.connect(self.start)

# this function creates a new thread and starts the timer
    def start(self):
        t = threading.Thread(target=self.timer, args=( ))
        t.start()

# timer function
    def timer(self):
        num = int(self.setWorkTxt.toPlainText())
        for i in range (1, num + 1):
            self.countDownTimer.display(i)
            time.sleep(1)
        audio.alarm() # this is where I want to call the class from the parent thread

# This is the alarm that I want to sound once the timer is finished
class audio(QSound):

    def alarm():
        QSound.play("alarm.wav")

if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    ex = Ui_Form()
    ex.show()
    sys.exit(app.exec_())

我是python和Qt的新手，所以如果我的一些术语错了或错过了一些简单的话我会道歉。

PyQt5从不同的线程调用类

0 个答案: