样式

  2.         widget = QLabel("Hello")
  3.         font = widget.font()
  4.         font.setPointSize(30)
  5.         widget.setFont(font)
  6.         # 文字组件垂直居中且水平居中，可选项有AlignTop,AlignBottom,AlignLeft,
  7.         #  AlignRight, AlignJustify,AlignCenter
  8.         widget.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
  9.         self.setCentralWidget(widget)

组件一览

  2. from PyQt5.QtWidgets import(
  3.     QCheckBox,QComboBox,QDateEdit,QDateTimeEdit,
  4.     QDial,QDoubleSpinBox,QFontComboBox,QLCDNumber,
  5.     QLabel,QLineEdit,QProgressBar,QPushButton,
  6.     QRadioButton,QSlider,QSpinBox, QTimeEdit,
  7.     QVBoxLayout,QWidget,QMainWindow,QApplication,
  8.     QLabel,
  9. )
  10. from PyQt5.QtCore import Qt
  11. import sys
  13. class MainWindow(QMainWindow):
  14.     def __init__(self):
  15.         super().__init__()
  16.         self.setWindowTitle("教学应用")
  17.         layout = QVBoxLayout()
  18.         widgets = [
  19.             # 勾选
  20.             QCheckBox,
  21.             # 下拉列表框
  22.             QComboBox,
  23.             # 日期输入框
  24.             QDateEdit,
  25.             # 时间输入框
  26.             QDateTimeEdit,
  27.             QDial,
  28.             # 双精度输入框
  29.             QDoubleSpinBox,
  30.             # 文字选项栏
  31.             QFontComboBox,
  32.             # 非交互式标签
  33.             QLabel,
  34.             # 输入框
  35.             QLineEdit,
  36.             # 进度条
  37.             QProgressBar,
  38.             # 按钮
  39.             QPushButton,
  40.             # 单项
  41.             QRadioButton,
  42.             # 滑块条
  43.             QSlider,
  44.             # 整数框
  45.             QSpinBox,
  46.             # 时间输入框
  47.             QTimeEdit,
  48.         ]
  50.         for w in widgets:
  51.             layout.addWidget(w())
  52.         # 实例化一个widget  
  53.         widget = QWidget()
  54.         # 将layout填入
  55.         widget.setLayout(layout)
  56.         self.setCentralWidget(widget)    
  58. if __name__ == "__main__":
  59.     app =QApplication(sys.argv)
  60.     window = MainWindow()
  61.     window.show()
  62.     app.exec()

3. 组件 - 图1

下拉框的设置

  1.   selectCom = QComboBox()
  2.        # 添加选项
  3.         selectCom.addItems(["卡布奇洛","拿铁","美式"]  )
  4.         # 监听索引值变动
  5.         selectCom.currentIndexChanged.connect(self.index_changed)
  6.         # 监听文本变动
  7.         selectCom.currentTextChanged.connect(self.text_changed)
  8.         # 下拉框具有输入功能
  9.         selectCom.setEditable(True)
  10.         # 设置选项最大长度
  11.         selectCom.setMaxCount(10)
  12.         self.setCentralWidget(selectCom)
  14.     def index_changed(self,i):
  15.         print(i)
  16.     def text_changed(self,t):
  17.         print(t)

3. 组件 - 图2

输入框

  1.         inputCom = QLineEdit()
  2.         # 设置输入框值最大长度
  3.         inputCom.setMaxLength(20)
  4.         # 提示文
  5.         inputCom.setPlaceholderText("请输入您的名字")
  6.         # 监听文本变动
  7.         inputCom.textChanged.connect(self.text_changed)
  8.         # 监听编辑变动
  9.         inputCom.textEdited.connect(self.text_edited)
  10.         # 监听回车键，注意这个监听不传输入框中的值
  11.         inputCom.returnPressed.connect(self.return_pressed)
  12.         self.setCentralWidget(inputCom)
  13.     def text_edited(self,i):
  14.         print(i)
  15.     def text_changed(self,t):
  16.         print(t)
  17.     def return_pressed(self):
  18.         # 修改输入框中的值
  19.         self.centralWidget().setText("Boom")

勾选框

  1.         checkBox = QCheckBox()
  2.         # 设置勾选的初始状态
  3.         checkBox.setCheckState(Qt.Unchecked)
  4.         checkBox.stateChanged.connect(self.show_state)
  5.         self.setCentralWidget(checkBox)
  6.     def show_state(self,s):
  7.        print(s == Qt.Checked)