pyqt5 之 信號+槽 測試用例

????在使用pycharm進行編寫代碼的時候，發現信號設置了connect一個槽，但是測試發現沒有起作用，另外，在pycharm編輯器上connect提示沒有這個函數，總是找不到原因，后面決定還是對碰到相應的知識點需要做對應的測試用例進行學習和驗證。

????下面這個是對信號+槽的一個典型實例。可以正常按預期運行，在pycharm中connect也顯示沒有這個函數，應該就是pycharm本身設置和提示的問題，后面忽略它。所以有時候也不能鉆牛角尖，pycharm也僅僅是個編輯器而已。

#-*-?coding:utf-8?-*-
'''
Signal?&?Slot
'''
__author__?=?'Tony?Zhu'

import?sys
from?PyQt5.QtCore?import?Qt
from?PyQt5.QtWidgets?import?(QWidget,?QLCDNumber,?QSlider,QGridLayout,QLabel,QHBoxLayout,?QGroupBox,
????QVBoxLayout,?QApplication,QProgressBar,QPushButton,QMessageBox)


class?SignalSlot(QWidget):

????def?__init__(self):
????????super(SignalSlot,self).__init__()
????????self.initUI()


????def?initUI(self):

????????self.controlsGroup?=?QGroupBox("運行樣本")
????????self.lcdNumber?=?QLCDNumber(self)
????????self.slider?=?QSlider(Qt.Horizontal,?self)
????????self.pBar?=?QProgressBar(self)
????????vbox?=?QVBoxLayout()
????????vbox.addWidget(self.pBar)
????????vbox.addWidget(self.lcdNumber)
????????vbox.addWidget(self.slider)
????????self.controlsGroup.setLayout(vbox)

????????controlsLayout?=?QGridLayout()
????????self.label1?=?QLabel("保存狀態：")
????????self.saveLabel?=?QLabel()
????????self.label2?=?QLabel("運行狀態：")
????????self.runLabel?=?QLabel()
????????self.buttonSave?=?QPushButton("保存")
????????self.buttonRun?=?QPushButton("運行")
????????self.buttonStop?=?QPushButton("停止")
????????self.buttonDisconnect?=?QPushButton("解除關聯")
????????self.buttonConnect?=?QPushButton("綁定關聯")

????????controlsLayout.addWidget(self.label1,0,0)
????????controlsLayout.addWidget(self.saveLabel,0,1)
????????controlsLayout.addWidget(self.label2,1,0)
????????controlsLayout.addWidget(self.runLabel,1,1)
????????controlsLayout.addWidget(self.buttonSave,2,0)
????????controlsLayout.addWidget(self.buttonRun,2,1)
????????controlsLayout.addWidget(self.buttonStop,2,2)
????????controlsLayout.addWidget(self.buttonDisconnect,3,0)
????????controlsLayout.addWidget(self.buttonConnect,3,1)

????????layout?=?QHBoxLayout()
????????layout.addWidget(self.controlsGroup)
????????layout.addLayout(controlsLayout)
????????self.setLayout(layout)

????????self.buttonRun.clicked.connect(self.buttonSave.clicked)
????????self.slider.valueChanged.connect(self.pBar.setValue)
????????self.slider.valueChanged.connect(self.lcdNumber.display)
????????self.buttonSave.clicked.connect(self.showMessage)
????????self.buttonRun.clicked.connect(self.showMessage)
????????self.buttonDisconnect.clicked.connect(self.unbindConnection)
????????self.buttonConnect.clicked.connect(self.bindConnection)
????????self.buttonStop.clicked.connect(self.stop)

????????self.setGeometry(300,?500,?500,?180)
????????self.setWindowTitle('信號和槽')

????def?showMessage(self):
????????if?self.sender().text()?==?"保存":
????????????self.saveLabel.setText("Saved")
????????elif?self.sender().text()?==?"運行":
????????????self.saveLabel.setText("Saved")
????????????self.runLabel.setText("Running")

????def?unbindConnection(self):
????????self.slider.valueChanged.disconnect()
????def?bindConnection(self):
????????self.slider.valueChanged.connect(self.pBar.setValue)
????????self.slider.valueChanged.connect(self.lcdNumber.display)
????def?stop(self):
????????self.saveLabel.setText("")
????????self.runLabel.setText("")

if?__name__?==?'__main__':

????app?=?QApplication(sys.argv)
????ex?=?SignalSlot()
????ex.show()
????sys.exit(app.exec_())