PyQt 按键控制文本框的输出

本是古典何须时尚 2023-06-17 04:55 5阅读 0赞

# 0 ：案例 #

案例：本案例的作用是，通过按钮输出文本框的内容：

fistMainWin.py

# -*- coding: utf-8 -*-
    # Form implementation generated from reading ui file 'firstMainWin.ui'
    #
    # Created by: PyQt5 UI code generator 5.6
    #
    # WARNING! All changes made in this file will be lost!
    
    from PyQt5 import QtCore, QtGui, QtWidgets
    class Ui_MainWindow(object):
        def setupUi(self, MainWindow):
            MainWindow.setObjectName("MainWindow")
            MainWindow.resize(792, 515)
            self.centralwidget = QtWidgets.QWidget(MainWindow)
            self.centralwidget.setObjectName("centralwidget")
            self.label = QtWidgets.QLabel(self.centralwidget)
            self.label.setGeometry(QtCore.QRect(30, 50, 54, 12))
            self.label.setObjectName("label")
            self.label_2 = QtWidgets.QLabel(self.centralwidget)
            self.label_2.setGeometry(QtCore.QRect(30, 110, 54, 12))
            self.label_2.setObjectName("label_2")
            self.label_3 = QtWidgets.QLabel(self.centralwidget)
            self.label_3.setGeometry(QtCore.QRect(30, 80, 54, 12))
            self.label_3.setObjectName("label_3")
            self.label_4 = QtWidgets.QLabel(self.centralwidget)
            self.label_4.setGeometry(QtCore.QRect(110, 20, 54, 12))
            self.label_4.setObjectName("label_4")
            self.label_7 = QtWidgets.QLabel(self.centralwidget)
            self.label_7.setGeometry(QtCore.QRect(180, 20, 54, 12))
            self.label_7.setObjectName("label_7")
            self.doubleSpinBox = QtWidgets.QDoubleSpinBox(self.centralwidget)
            self.doubleSpinBox.setGeometry(QtCore.QRect(80, 40, 62, 22))
            self.doubleSpinBox.setObjectName("doubleSpinBox")
            self.doubleSpinBox_2 = QtWidgets.QDoubleSpinBox(self.centralwidget)
            self.doubleSpinBox_2.setGeometry(QtCore.QRect(170, 40, 62, 22))
            self.doubleSpinBox_2.setObjectName("doubleSpinBox_2")
            self.doubleSpinBox_3 = QtWidgets.QDoubleSpinBox(self.centralwidget)
            self.doubleSpinBox_3.setGeometry(QtCore.QRect(80, 70, 62, 22))
            self.doubleSpinBox_3.setObjectName("doubleSpinBox_3")
            self.doubleSpinBox_4 = QtWidgets.QDoubleSpinBox(self.centralwidget)
            self.doubleSpinBox_4.setGeometry(QtCore.QRect(80, 100, 62, 22))
            self.doubleSpinBox_4.setObjectName("doubleSpinBox_4")
            self.doubleSpinBox_5 = QtWidgets.QDoubleSpinBox(self.centralwidget)
            self.doubleSpinBox_5.setGeometry(QtCore.QRect(170, 70, 62, 22))
            self.doubleSpinBox_5.setObjectName("doubleSpinBox_5")
            self.doubleSpinBox_6 = QtWidgets.QDoubleSpinBox(self.centralwidget)
            self.doubleSpinBox_6.setGeometry(QtCore.QRect(170, 100, 62, 22))
            self.doubleSpinBox_6.setObjectName("doubleSpinBox_6")
            self.pushButton = QtWidgets.QPushButton(self.centralwidget)
            self.pushButton.setGeometry(QtCore.QRect(430, 80, 75, 23))
            self.pushButton.setObjectName("pushButton")
            self.pushButton.raise_()
            self.label.raise_()
            self.label_2.raise_()
            self.label.raise_()
            self.label_2.raise_()
            self.label_3.raise_()
            self.label_4.raise_()
            self.label_7.raise_()
            self.doubleSpinBox.raise_()
            self.doubleSpinBox_2.raise_()
            self.doubleSpinBox_3.raise_()
            self.doubleSpinBox_4.raise_()
            self.doubleSpinBox_5.raise_()
            self.doubleSpinBox_6.raise_()
            self.pushButton.raise_()
            MainWindow.setCentralWidget(self.centralwidget)
            self.menubar = QtWidgets.QMenuBar(MainWindow)
            self.menubar.setGeometry(QtCore.QRect(0, 0, 792, 23))
            self.menubar.setObjectName("menubar")
            MainWindow.setMenuBar(self.menubar)
            self.statusbar = QtWidgets.QStatusBar(MainWindow)
            self.statusbar.setObjectName("statusbar")
            MainWindow.setStatusBar(self.statusbar)
            self.label.setBuddy(self.doubleSpinBox)
            self.label_2.setBuddy(self.doubleSpinBox_4)
            self.label_3.setBuddy(self.doubleSpinBox_3)
    
            self.retranslateUi(MainWindow)
            QtCore.QMetaObject.connectSlotsByName(MainWindow)
    
        def retranslateUi(self, MainWindow):
            _translate = QtCore.QCoreApplication.translate
            MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
            self.label.setText(_translate("MainWindow", "&收益"))
            self.label_2.setText(_translate("MainWindow", "sharp比"))
            self.label_3.setText(_translate("MainWindow", "回撤"))
            self.label_4.setText(_translate("MainWindow", "最大值"))
            self.label_7.setText(_translate("MainWindow", "最小值"))
            self.pushButton.setText(_translate("MainWindow", "开始"))

main.py

# -*- coding: utf-8 -*-
    
    """
    Module implementing LayoutDemo.
    """
    import sys
    from PyQt5.QtCore import pyqtSlot
    from PyQt5.QtWidgets import QMainWindow, QApplication
    from  firstMainWin import Ui_MainWindow
    
    class LayoutDemo(QMainWindow, Ui_MainWindow):
        """
        Class documentation goes here.
        """
        def __init__(self, parent=None):
            """
            Constructor
            @param parent reference to the parent widget
            @type QWidget
            """
            super(LayoutDemo, self).__init__(parent)
            self.setupUi(self)
        
        @pyqtSlot()
        def on_pushButton_clicked(self):
            """
            Slot documentation goes here.
            """
            print("ewqe")
            print('收益_min:',self.doubleSpinBox.text())
            print('收益_max:',self.doubleSpinBox_2.text())
            
    
            print('最大回撤_min:',self.doubleSpinBox_3.text())
            print('最大回撤_max:',self.doubleSpinBox_5.text())
            print('sharp比_min:',self.doubleSpinBox_4.text())
            print('sharp比_max:',self.doubleSpinBox_6.text())
    
    
    if __name__ == "__main__":
    
        app = QApplication(sys.argv)
        ui = LayoutDemo()
        ui.show()
        sys.exit(app.exec_())

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjUyODA4OQ_size_16_color_FFFFFF_t_70][]

运行结果：

![20191127152128428.png][]![20191127152140128.png][]

# 1： 布局和间距 #

PyQt 布局方式分为4种： 水平布局，垂直布局，表格布局，网格布局。

![20191127114848477.png][] 或者单击右键：有个布局。 请注意有个窗体布局。

虽然确定布局，但是需要确定布局之间的间距：

![20191127115123216.png][]        分别代表水平和垂直

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjUyODA4OQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191127152156221.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjUyODA4OQ==,size_16,color_FFFFFF,t_70
[20191127152128428.png]: https://img-blog.csdnimg.cn/20191127152128428.png
[20191127152140128.png]: https://img-blog.csdnimg.cn/20191127152140128.png
[20191127114848477.png]: https://img-blog.csdnimg.cn/20191127114848477.png
[20191127115123216.png]: https://img-blog.csdnimg.cn/20191127115123216.png