python ui学习过程，使用pyqt5实现

首先安装pyqt5的包，然后打开notebook就可以编写了。当然这样编写，也可以用designer进行。

它是pyqt5-tools的一个exe软件，\Anaconda3\Lib\site-packages\pyqt5_tools\QT\bin\designer.exe，可以实现可视化编辑，

然后通过 pyuic5 -o 目标文件名.py 源文件名.ui 转化后，将源文件进行修改就可以实现对应界面了。

可能需要之类，还是看ma吧 ：

 import sys
 from PyQt5.QtWidgets import QApplication, QMainWindow
 from mainWindow import *

 class MyWindow(QMainWindow, Ui_MainWindow):
     def __init__(self, parent=None):
         super(MyWindow, self).__init__(parent)
         self.setupUi(self)

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     myWin = MyWindow()
     myWin.show()
     sys.exit(app.exec_())

参考：https://blog.csdn.net/sqy941013/article/details/80572606

 

使用pyqt的一些资料：https://www.cnblogs.com/archisama/tag/PyQt5/

后面的代码是根据这里的文字写的，但是运行代码可以在退出的过程中无法响应或者出现kernel dead的情况。通过添加app.aboutToQuit.connect(app.deleteLater)在主函数中，可避免。

if __name__ == '__main__':
app = QApplication(sys.argv)
app.aboutToQuit.connect(app.deleteLater)
ex = Example()
app.exec_()

链接：https://www.jianshu.com/p/5a9bf7548fdb
来源：简书

 #!/usr/bin/env python
 # coding: utf-8

 # In[1]:

 #建立窗口
 import sys
 from PyQt5.QtWidgets import QApplication, QWidget
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     w = QWidget()
     w.resize(250, 150)
     w.move(300, 300)
     w.setWindowTitle('Simple')
     w.show()
     sys.exit(app.exec_())

 # In[ ]:

 #将窗口在屏幕上显示，并设置了它的尺寸。setGeometry()方法的前两个参数定位了窗口的x轴和y轴位置。第三个参数是定义窗口的宽度，第四个参数是定义窗口的高度。
 #建立窗口图标
 import sys
 from PyQt5.QtWidgets import QApplication, QWidget
 from PyQt5.QtGui import QIcon
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.setGeometry(100, 300, 300, 220)
         self.setWindowTitle('Icon')
         self.setWindowIcon(QIcon('test.png'))
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_()) 

 # In[1]:

 #创建按钮和TIP指示
 import sys
 from PyQt5.QtWidgets import (QWidget, QToolTip,
     QPushButton, QApplication)
 from PyQt5.QtGui import QFont
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         QToolTip.setFont(QFont('SansSerif', 10))
         self.setToolTip('This is a <b>QWidget</b> widget')
         btn = QPushButton('Button', self)
         btn.setToolTip('This is a <b>QPushButton</b> widget')#使用富文本格式
         #btn.resize(btn.sizeHint())#创建了一个按钮组件并且为它设置一个提示框。
         btn.move(50, 50)
         self.setGeometry(300, 300, 300, 200)
         self.setWindowTitle('Tooltips')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #将按钮链接到退出方案
 import sys
 from PyQt5.QtWidgets import QWidget, QPushButton, QApplication
 from PyQt5.QtCore import QCoreApplication
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         qbtn = QPushButton('Quit', self)
         qbtn.clicked.connect(QCoreApplication.instance().quit)
         qbtn.resize(qbtn.sizeHint())
         qbtn.move(50, 50)
         self.setGeometry(300, 300, 250, 150)
         self.setWindowTitle('Quit button')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #退出事件的触发与取舍
 import sys
 from PyQt5.QtWidgets import QWidget, QMessageBox, QApplication
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.setGeometry(300, 300, 250, 150)
         self.setWindowTitle('Message box')
         self.show()
     def closeEvent(self, event):
         reply = QMessageBox.question(self, 'Message',"Are you sure to quit?", QMessageBox.Yes |
             QMessageBox.No, QMessageBox.No)
         if reply == QMessageBox.Yes:
             event.accept()
         else:
             event.ignore()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #居中窗口
 import sys
 from PyQt5.QtWidgets import QWidget, QDesktopWidget, QApplication
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.resize(250, 150)
         self.center()#将窗口居中放置
         self.setWindowTitle('Center')
         self.show()
     def center(self):
         qr = self.frameGeometry()#获得主窗口的一个矩形特定几何图形。这包含了窗口的框架
         cp = QDesktopWidget().availableGeometry().center()#计算出相对于显示器的绝对值。并且从这个绝对值中，我们获得了屏幕中心点
         qr.moveCenter(cp)#把矩形的中心设置到屏幕的中间去
         self.move(qr.x(),qr.y())#移动了应用窗口的左上方的点到qr矩形的左上方的点，因此居中显示在我们的屏幕上
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_()) 

 # In[1]:

 #显示状态栏的信息
 import sys
 from PyQt5.QtWidgets import QMainWindow, QApplication
 class Example(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.statusBar().showMessage('Ready')
         self.setGeometry(300, 300, 250, 150)
         self.setWindowTitle('Statusbar')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #创建了一个菜单栏。我们创建一个file菜单，然后将退出动作添加到file菜单中
 import sys
 from PyQt5.QtWidgets import QMainWindow, QAction, qApp, QApplication
 from PyQt5.QtGui import QIcon
 class Example(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         exitAction = QAction(QIcon('test.jpg'), '&Exit', self)#创建标签
         exitAction.setShortcut('Ctrl+Q')#定义了一个快捷键
         exitAction.setStatusTip('Exit application')
         exitAction.triggered.connect(qApp.quit)
         self.statusBar()
         menubar = self.menuBar()
         fileMenu = menubar.addMenu('&File')
         fileMenu.addAction(exitAction)
         self.setGeometry(300, 300, 300, 200)
         self.setWindowTitle('Menubar')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #创建工具栏
 import sys
 from PyQt5.QtWidgets import QMainWindow, QAction, qApp, QApplication
 from PyQt5.QtGui import QIcon
 class Example(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         exitAction = QAction(QIcon('test.png'), 'Exit1', self)
         exitAction.setShortcut('Ctrl+Q')
         exitAction1 = QAction(QIcon('test.png'), 'Exit1', self)
         exitAction1.setShortcut('Ctrl+W')
         exitAction.triggered.connect(qApp.quit)
         self.toolbar = self.addToolBar('Exit')
         self.toolbar.addAction(exitAction)
         self.toolbar.addAction(exitAction1)
         self.setGeometry(300, 300, 300, 200)
         self.setWindowTitle('Toolbar')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #设置文本相对于窗口的位置
 import sys
 from PyQt5.QtWidgets import QWidget, QLabel, QApplication
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         lbl1 = QLabel('Zetcode', self)
         lbl1.move(15, 10)
         lbl2 = QLabel('tutorials', self)
         lbl2.move(35, 40)
         lbl3 = QLabel('for programmers', self)
         lbl3.move(55, 70)
         self.setGeometry(300, 300, 250, 150)
         self.setWindowTitle('Absolute')
         self.show()
 if __name__ == '__main__':

     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 import sys
 from PyQt5.QtWidgets import (QWidget, QPushButton,
     QHBoxLayout, QVBoxLayout, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         okButton = QPushButton("OK")
         cancelButton = QPushButton("Cancel")
         hbox = QHBoxLayout()
         hbox.addStretch(1)#增加了一个拉伸因子，拉伸因子在两个按钮之前增加了一个可伸缩空间。这具体不知道。
         hbox.addWidget(okButton)
         hbox.addWidget(cancelButton)
         vbox = QVBoxLayout()
         vbox.addStretch(0)#增加了一个拉伸因子，拉伸因子在两个按钮之前增加了一个可伸缩空间。这具体不知道。
         vbox.addLayout(hbox)
         self.setLayout(vbox)   

         self.setGeometry(300, 300, 300, 150)
         self.setWindowTitle('Buttons')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #创建一个网格的定位列表，计算器样式
 import sys
 from PyQt5.QtWidgets import (QWidget, QGridLayout,
     QPushButton, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         grid = QGridLayout()
         self.setLayout(grid)
         names = ['Cls', 'Bck', '', 'Close',
                  '', '', '', '/',
                 '', '', '', '*',
                  '', '', '', '-',
                 '', '.', '=', '+']
         positions = [(i,j) for i in range(5) for j in range(4)]
         for position, name in zip(positions, names):
             if name == '':
                 continue
             button = QPushButton(name)
             grid.addWidget(button, *position)
         self.move(300, 150)
         self.setWindowTitle('Calculator')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #文本审阅窗口，利用网格定位。
 import sys
 from PyQt5.QtWidgets import (QWidget, QLabel, QLineEdit,
     QTextEdit, QGridLayout, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         title = QLabel('Title')
         author = QLabel('Author')
         review = QLabel('Review')
         titleEdit = QLineEdit()
         authorEdit = QLineEdit()
         reviewEdit = QTextEdit()
         grid = QGridLayout()
         grid.setSpacing(10)
         grid.addWidget(title, 1, 0)
         grid.addWidget(titleEdit, 1, 1)
         grid.addWidget(author, 2, 0)
         grid.addWidget(authorEdit, 2, 1)
         grid.addWidget(review, 3, 0)
         grid.addWidget(reviewEdit, 3, 1, 5, 1)
         self.setLayout(grid)
         self.setGeometry(300, 300, 350, 300)
         self.setWindowTitle('Review')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #时间和槽，拖动滑块条的把手，lcd数字会变化
 import sys
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import (QWidget, QLCDNumber, QSlider,QVBoxLayout, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         lcd = QLCDNumber(self)
         sld = QSlider(Qt.Horizontal, self)
         vbox = QVBoxLayout()
         vbox.addWidget(lcd)
         vbox.addWidget(sld)
         self.setLayout(vbox)
         sld.valueChanged.connect(lcd.display)
         self.setGeometry(300, 300, 250, 150)
         self.setWindowTitle('Signal & slot')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #重写了keyPressEvent()事件处理函数，Esc按键按下的处理
 import sys
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import QWidget, QApplication
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.setGeometry(300, 300, 250, 150)
         self.setWindowTitle('Event handler')
         self.show()
     def keyPressEvent(self, e):
         if e.key() == Qt.Key_Escape:
             self.close()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #利用sender解决事件发送者的问题
 import sys
 from PyQt5.QtWidgets import QMainWindow, QPushButton, QApplication
 class Example(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         btn1 = QPushButton("Button 1", self)
         btn1.move(30, 50)
         btn2 = QPushButton("Button 2", self)
         btn2.move(150, 50)
         btn1.clicked.connect(self.buttonClicked)
         btn2.clicked.connect(self.buttonClicked)#两个按钮都连接到了同一个槽中。
         self.statusBar()
         self.setGeometry(300, 300, 290, 150)
         self.setWindowTitle('Event sender')
         self.show()
     def buttonClicked(self):
         sender = self.sender()
         self.statusBar().showMessage(sender.text() + ' was pressed')
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[4]:

 #发送自定义的信号
 import sys
 from PyQt5.QtCore import pyqtSignal, QObject
 from PyQt5.QtWidgets import QMainWindow, QApplication
 class Communicate(QObject):
     closeApp = pyqtSignal()#创建一个新的信号叫做closeApp，并且成为外部类Communicate类的属性

 class Example(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.c = Communicate()
         self.c.closeApp.connect(self.close)#把自定义的closeApp信号连接到QMainWindow的close()槽上
         self.setGeometry(300, 300, 290, 150)
         self.setWindowTitle('Emit signal')
         self.show()
     def mousePressEvent(self, event):
         self.c.closeApp.emit()#closeApp信号会被发射。
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[1]:

 #输入对话框与显示
 import sys
 from PyQt5.QtWidgets import (QWidget, QPushButton, QLineEdit,
     QInputDialog, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.btn = QPushButton('Dialog', self)
         self.btn.move(20, 20)
         self.btn.clicked.connect(self.showDialog)
         self.le = QLineEdit(self)
         self.le.move(130, 22)
         self.setGeometry(300, 300, 290, 150)
         self.setWindowTitle('Input dialog')
         self.show()
     def showDialog(self):
         text, ok = QInputDialog.getText(self, 'Input Dialog',
             'Enter your name:')#第一个字符串参数是对话框的标题，第二个字符串参数是对话框内的消息文本。对话框返回输入的文本内容和一个布尔值。
         if ok:
             self.le.setText(str(text))
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #颜色选择对话框
 import sys
 from PyQt5.QtWidgets import (QWidget, QPushButton, QFrame,
     QColorDialog, QApplication)
 from PyQt5.QtGui import QColor
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         col = QColor(0, 0, 0)
         self.btn = QPushButton('Dialog', self)
         self.btn.move(20, 20)
         self.btn.clicked.connect(self.showDialog)
         self.frm = QFrame(self)
         self.frm.setStyleSheet("QWidget { background-color: %s }"
             % col.name())
         self.frm.setGeometry(130, 22, 100, 100)
         self.setGeometry(300, 300, 250, 180)
         self.setWindowTitle('Color dialog')
         self.show()
     def showDialog(self):
         col = QColorDialog.getColor()
         if col.isValid():
             self.frm.setStyleSheet("QWidget { background-color: %s }"
                 % col.name())
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #字体选择框
 import sys
 from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QPushButton,
     QSizePolicy, QLabel, QFontDialog, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         vbox = QVBoxLayout()
         btn = QPushButton('Dialog', self)
         btn.setSizePolicy(QSizePolicy.Fixed,
             QSizePolicy.Fixed)
         btn.move(20, 20)
         vbox.addWidget(btn)
         btn.clicked.connect(self.showDialog)
         self.lbl = QLabel('Knowledge only matters', self)
         self.lbl.move(130, 20)
         vbox.addWidget(self.lbl)
         self.setLayout(vbox)
         self.setGeometry(300, 300, 250, 180)
         self.setWindowTitle('Font dialog')
         self.show()
     def showDialog(self):
         font, ok = QFontDialog.getFont()
         if ok:
             self.lbl.setFont(font)
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #文件对话框，读取文件
 import sys
 from PyQt5.QtWidgets import (QMainWindow, QTextEdit,
     QAction, QFileDialog, QApplication)
 from PyQt5.QtGui import QIcon
 class Example(QMainWindow):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.textEdit = QTextEdit()
         self.setCentralWidget(self.textEdit)
         self.statusBar()
         openFile = QAction(QIcon('open.png'), 'Open', self)
         openFile.setShortcut('Ctrl+O')
         openFile.setStatusTip('Open new File')
         openFile.triggered.connect(self.showDialog)
         menubar = self.menuBar()
         fileMenu = menubar.addMenu('&File')
         fileMenu.addAction(openFile)
         self.setGeometry(300, 300, 350, 300)
         self.setWindowTitle('File dialog')
         self.show()
     def showDialog(self):
         fname = QFileDialog.getOpenFileName(self, 'Open file', '/home')
         if fname[0]:
             f = open(fname[0], 'r')
             with f:
                 data = f.read()
                 self.textEdit.setText(data)       

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

 # In[4]:

 #复选框
 import sys
 from PyQt5.QtWidgets import QWidget, QCheckBox, QApplication
 from PyQt5.QtCore import Qt
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         cb = QCheckBox('Show title', self)
         cb.move(20, 20)
         cb.toggle()#选中复选框
         cb.stateChanged.connect(self.changeTitle)
         self.setGeometry(300, 300, 250, 150)
         self.setWindowTitle('QCheckBox')
         self.show()
     def changeTitle(self, state):
         if state == Qt.Checked:
             self.setWindowTitle('QCheckBox')
         else:
             self.setWindowTitle('')
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[6]:

 #红绿蓝按钮，切换按钮
 import sys
 from PyQt5.QtWidgets import (QWidget, QPushButton,
     QFrame, QApplication)
 from PyQt5.QtGui import QColor
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.col = QColor(0, 0, 0)
         redb = QPushButton('Red', self)
         redb.setCheckable(True)
         redb.move(10, 10)
         redb.clicked[bool].connect(self.setColor)
         redb = QPushButton('Green', self)
         redb.setCheckable(True)
         redb.move(10, 60)
         redb.clicked[bool].connect(self.setColor)
         blueb = QPushButton('Blue', self)
         blueb.setCheckable(True)
         blueb.move(10, 110)
         blueb.clicked[bool].connect(self.setColor)
         self.square = QFrame(self)
         self.square.setGeometry(150, 20, 100, 100)
         self.square.setStyleSheet("QWidget { background-color: %s }" %
             self.col.name())
         self.setGeometry(300, 300, 280, 170)
         self.setWindowTitle('Toggle button')
         self.show()
     def setColor(self, pressed):
         source = self.sender()
         if pressed:
             val = 255
         else: val = 0
         if source.text() == "Red":
             self.col.setRed(val)
         elif source.text() == "Green":
             self.col.setGreen(val)
         else:
             self.col.setBlue(val)
         self.square.setStyleSheet("QFrame { background-color: %s }" %
             self.col.name())
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #根据滑动条改变图片
 import sys
 from PyQt5.QtWidgets import (QWidget, QSlider,
     QLabel, QApplication)
 from PyQt5.QtCore import Qt
 from PyQt5.QtGui import QPixmap
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         sld = QSlider(Qt.Horizontal, self)
         sld.setFocusPolicy(Qt.NoFocus)
         sld.setGeometry(30, 40, 100, 30)
         sld.valueChanged[int].connect(self.changeValue)
         self.label = QLabel(self)
         self.label.setPixmap(QPixmap('mute.png'))
         self.label.setGeometry(160, 40, 80, 30)
         self.setGeometry(300, 300, 280, 170)
         self.setWindowTitle('QSlider')
         self.show()
     def changeValue(self, value):
         if value == 0:
             self.label.setPixmap(QPixmap('mute.png'))
         elif value > 0 and value <= 30:
             self.label.setPixmap(QPixmap('min.png'))
         elif value > 30 and value < 80:
             self.label.setPixmap(QPixmap('med.png'))
         else:
             self.label.setPixmap(QPixmap('test.png'))
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[3]:

 #利用按钮控制进度条的发展
 import sys
 from PyQt5.QtWidgets import (QWidget, QProgressBar,
     QPushButton, QApplication)
 from PyQt5.QtCore import QBasicTimer
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.pbar = QProgressBar(self)
         self.pbar.setGeometry(30, 40, 200, 25)
         self.btn = QPushButton('Start', self)
         self.btn.move(40, 80)
         self.btn.clicked.connect(self.doAction)
         self.timer = QBasicTimer()
         self.step = 0
         self.setGeometry(300, 300, 280, 170)
         self.setWindowTitle('QProgressBar')
         self.show()
     def timerEvent(self, e):
         if self.step >= 100:
             self.timer.stop()
             self.btn.setText('Finished')
             return
         self.step = self.step + 1
         self.pbar.setValue(self.step)
     def doAction(self):
         if self.timer.isActive():
             self.timer.stop()
             self.btn.setText('Start')
         else:
             self.timer.start(100, self)
             self.btn.setText('Stop')
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[4]:

 #日历组件
 import sys
 from PyQt5.QtWidgets import (QWidget, QCalendarWidget,
     QLabel, QApplication)
 from PyQt5.QtCore import QDate
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         cal = QCalendarWidget(self)
         cal.setGridVisible(True)
         cal.move(20, 20)
         cal.clicked[QDate].connect(self.showDate)
         self.lbl = QLabel(self)
         date = cal.selectedDate()
         self.lbl.setText(date.toString())
         self.lbl.move(130, 260)
         self.setGeometry(300, 300, 350, 300)
         self.setWindowTitle('Calendar')
         self.show()
     def showDate(self, date):
         self.lbl.setText(date.toString())
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[6]:

 #添加像素图
 import sys
 from PyQt5.QtWidgets import (QWidget, QHBoxLayout,
     QLabel, QApplication)
 from PyQt5.QtGui import QPixmap
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         hbox = QHBoxLayout(self)
         pixmap = QPixmap("test.jpg")
         lbl = QLabel(self)
         lbl.setPixmap(pixmap)
         hbox.addWidget(lbl)
         self.setLayout(hbox)
         self.move(300, 200)
         self.setWindowTitle('Red Rock')
         self.show()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

 #单行文本编辑和标签一起变化
 import sys
 from PyQt5.QtWidgets import (QWidget, QLabel,
     QLineEdit, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.lbl = QLabel(self)
         qle = QLineEdit(self)
         qle.move(60, 100)
         self.lbl.move(60, 40)
         qle.textChanged[str].connect(self.onChanged)
         self.setGeometry(300, 300, 280, 170)
         self.setWindowTitle('QLineEdit')
         self.show()
     def onChanged(self, text):
         self.lbl.setText(text)
         self.lbl.adjustSize()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = Example()
     sys.exit(app.exec_())

 # In[3]:

 #分割框，水平，垂直，嵌套
 import sys
 from PyQt5.QtWidgets import (QWidget, QHBoxLayout, QFrame,
     QSplitter, QStyleFactory, QApplication)
 from PyQt5.QtCore import Qt
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         hbox = QHBoxLayout(self)
         topleft = QFrame(self)
         topleft.setFrameShape(QFrame.StyledPanel)
         topright = QFrame(self)
         topright.setFrameShape(QFrame.StyledPanel)
         bottom = QFrame(self)
         bottom.setFrameShape(QFrame.StyledPanel)
         splitter1 = QSplitter(Qt.Horizontal)
         splitter1.addWidget(topleft)
         splitter1.addWidget(topright)
         splitter2 = QSplitter(Qt.Vertical)
         splitter2.addWidget(splitter1)
         splitter2.addWidget(bottom)
         hbox.addWidget(splitter2)
         self.setLayout(hbox)
         self.setGeometry(300, 300, 300, 200)
         self.setWindowTitle('QSplitter')
         self.show()
     def onChanged(self, text):
         self.lbl.setText(text)
         self.lbl.adjustSize()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[5]:

 #下拉列表框
 import sys
 from PyQt5.QtWidgets import (QWidget, QLabel,
     QComboBox, QApplication)
 class Example(QWidget):
     def __init__(self):
         super().__init__()
         self.initUI()
     def initUI(self):
         self.lbl = QLabel("Ubuntu", self)
         combo = QComboBox(self)
         combo.addItem("Ubuntu")
         combo.addItem("Mandriva")
         combo.addItem("Fedora")
         combo.addItem("Arch")
         combo.addItem("Gentoo")
         combo.move(50, 50)
         self.lbl.move(50, 150)
         combo.activated[str].connect(self.onActivated)
         self.setGeometry(300, 300, 300, 200)
         self.setWindowTitle('QComboBox')
         self.show()
     def onActivated(self, text):
         self.lbl.setText(text)
         self.lbl.adjustSize()
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     app.aboutToQuit.connect(app.deleteLater)
     ex = Example()
     sys.exit(app.exec_())

 # In[ ]:

代码在上，包含了几乎所有的那个啥了。如果需要，那就有看看吧。