按钮在 pyqt5 的第二个窗口上不起作用

Question

我正在使用 pyqt5 制作先到先得的调度程序。

我的主窗口包括询问用户调度程序类型的文本框，当单击“GO”按钮时，会打开第二个窗口，询问用户有关调度程序的更多信息，如进程号和突发时间。

当点击第二个窗口上的“GO”按钮时，处理完信息后会出现甘特图。

问题是第二个窗口上的按钮根本不起作用。

我找到了similar question，但我并没有完全得到解决方案，而且我没有使用 JSON。

代码：

import sys
from PyQt5 import QtGui
from PyQt5.QtWidgets import QMainWindow,QApplication, QComboBox, QDialog,QDialogButtonBox, QFormLayout, QGridLayout, QGroupBox, QHBoxLayout,QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QSpinBox, QTextEdit,QVBoxLayoutQSpinBox, QTextEdit, QVBoxLayout
from PyQt5.QtGui import QIcon 
from PyQt5.QtCore import pyqtSlot
import matplotlib.pyplot as plt
import numpy as np
import linked_list

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("My Program")
        self.setWindowIcon(QtGui.QIcon("download.jpg"))
        self.setGeometry(50,50,500,300)
        self.home()
        self.show()

    def home(self):
        self.label2=QLabel(self)
        self.label2.setText("Type of Scheduler")
        self.label2.move(10,50)

        self.textbox2=QLineEdit(self)
        self.textbox2.move(100,50)

        self.button=QPushButton("Go",self)
        self.button.move(0,200)
        self.button.clicked.connect(self.runcode)

    def runcode(self):
       schedular_type=self.textbox2.text()
       if(schedular_type=="FCFS"):
        self.close()
        self.fcfs=Window2(self)
        Self.fcfs.__init__()



class Window2(QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowTitle("My Program")
        self.setWindowIcon(QtGui.QIcon("download.jpg"))
        self.setGeometry(50,50,500,300)
        self.home()
        self.show()

    def home(self):
        self.label1=QLabel(self)
        self.label1.setText("No of Processes")
        self.label1.move(10,0) #col ,row
        self.textbox=QLineEdit(self)
        self.textbox.move(100,0)
        self.label3=QLabel(self)
        self.label3.setText("Processess Names")
        self.label3.move(10,100)
        self.label4=QLabel(self)
        self.label4.setText("Burst Time")
        self.label4.move(120,100)
        self.label5=QLabel(self)
        self.label5.setText("Arrival Time")
        self.label5.move(200,100)
        self.names=QLineEdit(self)
        self.names.move(10,150)
        # self.names.resize(100,160)
        self.burst=QLineEdit(self)
        self.burst.move(120,150)
        #self.burst.resize(100,160)
        self.arrival=QLineEdit(self)
        self.arrival.move(250 ,150)
        #self.arrival.resize(100,160)
        #self.textEdit=QTextEdit(self)
        #self.textEdit.move(20,250)
        self.button=QPushButton("Go",self)
        self.button.move(0,200)
        self.button.clicked.connect(self.fcfs)

    def fcfs(self):
      //






def main():

    app = QApplication(sys.argv)
    main = MainWindow()
    main.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

---

Answer 1

将父窗口设置为第二个窗口，同时您也调用了 Window2 的 ____init____ 方法两次。 这是固定代码：

import sys
from PyQt5 import QtGui
from PyQt5.QtWidgets import (QMainWindow, QApplication, QComboBox,
QDialog, QDialogButtonBox, QFormLayout, QGridLayout, QGroupBox,
QHBoxLayout, QLabel, QLineEdit, QMenu, QMenuBar, QPushButton, QSpinBox,
QTextEdit, QVBoxLayout)
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import pyqtSlot
import matplotlib.pyplot as plt
import numpy as np
import linked_list

class MainWindow(QMainWindow):

    def __init__(self):
        super().__init__()
        self.setWindowTitle("My Program")
        self.setWindowIcon(QtGui.QIcon("download.jpg"))
        self.setGeometry(50, 50, 500, 300)
        self.home()
        self.show()

    def home(self):

        self.label2 = QLabel(self)
        self.label2.setText("Type of Scheduler")
        self.label2.move(10, 50)

        self.textbox2 = QLineEdit(self)
        self.textbox2.move(100, 50)

        self.button = QPushButton("Go", self)
        self.button.move(0, 200)
        self.button.clicked.connect(self.runcode)

    def runcode(self):
        schedular_type = self.textbox2.text()
        if(schedular_type == "FCFS"):
            self.close()
            fcfs = Window2(self)
            # Do not call __init__ explicitly below
            # fcfs.__init__()


class Window2(QMainWindow):

    def __init__(self,parent=None):
        super().__init__(parent)
        # always try to set a parent
        self.setWindowTitle("My Program")
        self.setWindowIcon(QtGui.QIcon("download.jpg"))
        self.setGeometry(50, 50, 500, 300)
        self.home()
        self.show()

    def home(self):
        self.label1 = QLabel(self)
        self.label1.setText("No of Processes")
        self.label1.move(10, 0)  # col ,row

        self.textbox = QLineEdit(self)
        self.textbox.move(100, 0)

        self.label3 = QLabel(self)
        self.label3.setText("Processess Names")
        self.label3.move(10, 100)

        self.label4 = QLabel(self)
        self.label4.setText("Burst Time")
        self.label4.move(120, 100)

        self.label5 = QLabel(self)
        self.label5.setText("Arrival Time")
        self.label5.move(200, 100)

        self.names = QLineEdit(self)
        self.names.move(10, 150)
        # self.names.resize(100,160)

        self.burst = QLineEdit(self)
        self.burst.move(120, 150)
        # self.burst.resize(100,160)

        self.arrival = QLineEdit(self)
        self.arrival.move(250, 150)
        # self.arrival.resize(100,160)
        # self.textEdit=QTextEdit(self)
        # self.textEdit.move(20,250)

        self.button = QPushButton("Go", self)
        self.button.move(0, 200)
        self.button.clicked.connect(self.fcfs)

    def fcfs(self):
        no_of_process = self.textbox.text()
        process_names = self.names.text()
        burst_time = self.burst.text()
        arrival_time = self.arrival.text()

        names_list = process_names.split()
        burst_list = burst_time.split()
        arrival_list = arrival_time.split()

   # integer conversion

        burst_list = [int(i) for i in burst_list]
        arrival_list = [int(i) for i in arrival_list]
        no_of_process = int(no_of_process)

        ls = LinkedList()
        i = 0

        while i < no_of_process:
            ls.append(names_list[i], burst_list[i], arrival_list[i])
            i = i + 1

        time = arrival_list[0]
        j = 0
        start = []
        end = []
        name = []
        while j < (ls.size()):
            while(time < arrival_list[j]):
                time = time + 1

                start.append(time)
                time = time + burst_list[j]
                end.append(time)
                name.append(names_list[j])
                j = j + 1
        waiting_time = 0
        k = 0
        average_waiting = 0
        while k < (ls.size()):
            waiting_time = waiting_time + \
                end[k] - arrival_list[k] - burst_list[k]
            average_waiting = waiting_time / ls.size()
            k = k + 1

        x = name
        begin = np.array(start)
        end = np.array(end)
        plt.barh(range(len(begin)),  end - begin, left=begin)
        plt.yticks(range(len(begin)), x)
        #plt.text(0.6,1.5,('average waiting is ',average_waiting))
        plt.annotate(("average waiting is", average_waiting), xy=(0.5, 1.49))
        plt.show()


def main():

    app = QApplication(sys.argv)
    main = MainWindow()
    main.show()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

关键部分是：

def __init__(self,parent=None):
        super().__init__(parent)