（二）PyQt5基础学习

逃离我推掉我的手 2022-12-22 06:15 200阅读 0赞

今天快速的学习一下如何实现PyQt5的布局管理。

一般看到的程序，都会有确定，取消之类的按钮，帮助整个界面呈现出一定的规律性，就让人感觉这个界面是有序的。

## **学习链接：[http://code.py40.com/pyqt5/18.html][http_code.py40.com_pyqt5_18.html] ** ##

--------------------

# 一、源码 #

import sys
    from PyQt5.QtWidgets import QWidget, QLabel, QApplication
     
     
    class Example(QWidget):
        
        def __init__(self):
            super().__init__()
            
            self.initUI()
            
            
        def initUI(self):
            
            lbl1 = QLabel('第一个', self)
            lbl1.move(15, 10)
     
            lbl2 = QLabel('第二个', self)
            lbl2.move(35, 40)
            
            lbl3 = QLabel('第三个', 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_())

![20201118095538208.png][]

#  二、框布局 Boxlayout #

#框布局
    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)
            hbox.addWidget(okButton)
            hbox.addWidget(cancelButton)
     
            vbox = QVBoxLayout()
            vbox.addStretch(1)
            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_())

![2020111809580181.png][]

# 三、表格布局 QGridLayout #

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', 'OK', 'Close',
                     '7', '8', '9', '/',
                    '4', '5', '6', '*',
                     '1', '2', '3', '-',
                    '0', '.', '=', '+']
            
            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_())

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lxbF82MTc1NDAyOTg_size_16_color_FFFFFF_t_70][]

###  关键性代码： ###

names = ['Cls', 'Bck', 'OK', 'Close',
                     '7', '8', '9', '/',
                    '4', '5', '6', '*',
                     '1', '2', '3', '-',
                    '0', '.', '=', '+']
            
    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)

# 四、评论 #

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_())

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lxbF82MTc1NDAyOTg_size_16_color_FFFFFF_t_70 1][]

[http_code.py40.com_pyqt5_18.html]: http://code.py40.com/pyqt5/18.html
[20201118095538208.png]: /images/20221120/a0bc61dc17574b218293afa2f4675619.png
[2020111809580181.png]: /images/20221120/b9daee35ebc04c27a0ea457f52bfb7e7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lxbF82MTc1NDAyOTg_size_16_color_FFFFFF_t_70]: /images/20221120/17ae395814a14c9a978e2d232eb6e388.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lxbF82MTc1NDAyOTg_size_16_color_FFFFFF_t_70 1]: /images/20221120/da3681be19074c809a1d26c90ecff38e.png