【python】PyQt5实现生成二维码并保存的功能（附源码，带注释）

谁践踏了优雅 2023-09-30 16:23 51阅读 0赞

> **源码请点赞关注收藏后评论区留言或私信博主要**

程序运行结果如下

![5407c829f4e7464785a515ab3982102f.png][]

可以通过调节边距来放缩二维码大小

![c7c3073dcb35482cb448ad98effae5ef.png][]

点击保存二维码后弹出保存文件路径

![713ef9e9ae274d4e9f2725baf9426465.png][]

代码分为以下几个模块 1：二维码图形界面模块

def __init__(self, parent=None):
    		super().__init__()
    		self.setFixedSize(600, 400)
    		self.setWindowTitle('二维码生成器-ljl')
    		self.grid = QGridLayout()
    		# 定义组件
    		# 	--Label
    		self.content_label = QLabel('内容:')
    		self.size_label = QLabel('尺寸:')
    		self.version_label = QLabel('版本:')
    		self.margin_label = QLabel('边距:')
    		self.rendering_label = QLabel('效果:')
    		self.show_label = QLabel()
    		# 		使得图片可缩放
    		self.show_label.setScaledContents(True)
    		# 		显示时的最大尺寸
    		self.show_label.setMaximumSize(200, 200)
    		# 	--输入框
    		self.content_edit = QLineEdit()
    		self.content_edit.setText('微信公众号:ljl')
    		# 	--按钮
    		self.generate_button = QPushButton('生成二维码')
    		self.save_button = QPushButton('保存二维码')
    		# 	--下拉框
    		self.version_combobox = QComboBox()
    		for i in range(1, 41):
    			self.version_combobox.addItem('%s' % str(i))
    		self.size_combobox = QComboBox()
    		for i in range(8, 40, 2):
    			self.size_combobox.addItem('%s * %s' % (str(i*29), str(i*29)))
    		# 	--微调框
    		self.margin_spinbox = QSpinBox()
    		# 布局
    		# 	数字依次对应行, 列, 行数和列数
    		self.grid.addWidget(self.rendering_label, 0, 0, 1, 1)
    		self.grid.addWidget(self.show_label, 0, 0, 5, 5)
    		self.grid.addWidget(self.content_label, 0, 5, 1, 1)
    		self.grid.addWidget(self.content_edit, 0, 6, 1, 3)
    		self.grid.addWidget(self.version_label, 1, 5, 1, 1)
    		self.grid.addWidget(self.version_combobox, 1, 6, 1, 1)
    		self.grid.addWidget(self.size_label, 2, 5, 1, 1)
    		self.grid.addWidget(self.size_combobox, 2, 6, 1, 1)
    		self.grid.addWidget(self.margin_label, 3, 5, 1, 1)
    		self.grid.addWidget(self.margin_spinbox, 3, 6, 1, 1)
    		self.grid.addWidget(self.generate_button, 4, 5, 1, 2)
    		self.grid.addWidget(self.save_button, 5, 5, 1, 2)
    		self.setLayout(self.grid)
    		self.generate_button.clicked.connect(self.genQrcode)
    		self.save_button.clicked.connect(self.saveQrcode)
    		self.margin_spinbox.valueChanged.connect(self.genQrcode)
    		self.genQrcode()

2：生成二维码模块

def genQrcode(self):
    		content = self.content_edit.text()
    		try:
    			margin = int(self.margin_spinbox.text())
    		except:
    			margin = 0
    		size = int(self.size_combobox.currentText().split('*')[0])
    		qr = qrcode.QRCode(version=1,
    						   error_correction=qrcode.constants.ERROR_CORRECT_L,
    						   box_size=size//29,
    						   border=margin)
    		qr.add_data(content)
    		self.qr_img = qr.make_image()
    		fp = io.BytesIO()
    		self.qr_img.save(fp, 'BMP')
    		qimg = QtGui.QImage()
    		qimg.loadFromData(fp.getvalue(), 'BMP')
    		qimg_pixmap = QtGui.QPixmap.fromImage(qimg)
    		self.show_label.setPixmap(qimg_pixmap)

3：保存二维码模块

def saveQrcode(self):
    		filename = QFileDialog.getSaveFileName(self, '保存', './qrcode.png', '所有文件(*)')
    		if filename[0] != '':
    			self.qr_img.save(filename[0])
    			QDialog().show()

代码整合后如下

import io
    import sys
    import qrcode
    from PyQt5 import QtWidgets, QtGui
    from PyQt5.QtWidgets import QApplication, QGridLayout, QLabel, QLineEdit, QPushButton, QComboBox, QSpinBox, QFileDialog, QDialog
    #pyqt5制作界面常用
    
    '''Demo'''
    #图形界面的类
    class qrcodeGUI(QtWidgets.QWidget):
    	def __init__(self, parent=None):
    		super().__init__()
    		self.setFixedSize(600, 400)
    		self.setWindowTitle('二维码生成器-ljl')
    		self.grid = QGridLayout()
    		# 定义组件
    		# 	--Label
    		self.content_label = QLabel('内容:')
    		self.size_label = QLabel('尺寸:')
    		self.version_label = QLabel('版本:')
    		self.margin_label = QLabel('边距:')
    		self.rendering_label = QLabel('效果:')
    		self.show_label = QLabel()
    		# 		使得图片可缩放
    		self.show_label.setScaledContents(True)
    		# 		显示时的最大尺寸
    		self.show_label.setMaximumSize(200, 200)
    		# 	--输入框
    		self.content_edit = QLineEdit()
    		self.content_edit.setText('微信公众号:ljl')
    		# 	--按钮
    		self.generate_button = QPushButton('生成二维码')
    		self.save_button = QPushButton('保存二维码')
    		# 	--下拉框
    		self.version_combobox = QComboBox()
    		for i in range(1, 41):
    			self.version_combobox.addItem('%s' % str(i))
    		self.size_combobox = QComboBox()
    		for i in range(8, 40, 2):
    			self.size_combobox.addItem('%s * %s' % (str(i*29), str(i*29)))
    		# 	--微调框
    		self.margin_spinbox = QSpinBox()
    		# 布局
    		# 	数字依次对应行, 列, 行数和列数
    		self.grid.addWidget(self.rendering_label, 0, 0, 1, 1)
    		self.grid.addWidget(self.show_label, 0, 0, 5, 5)
    		self.grid.addWidget(self.content_label, 0, 5, 1, 1)
    		self.grid.addWidget(self.content_edit, 0, 6, 1, 3)
    		self.grid.addWidget(self.version_label, 1, 5, 1, 1)
    		self.grid.addWidget(self.version_combobox, 1, 6, 1, 1)
    		self.grid.addWidget(self.size_label, 2, 5, 1, 1)
    		self.grid.addWidget(self.size_combobox, 2, 6, 1, 1)
    		self.grid.addWidget(self.margin_label, 3, 5, 1, 1)
    		self.grid.addWidget(self.margin_spinbox, 3, 6, 1, 1)
    		self.grid.addWidget(self.generate_button, 4, 5, 1, 2)
    		self.grid.addWidget(self.save_button, 5, 5, 1, 2)
    		self.setLayout(self.grid)
    		self.generate_button.clicked.connect(self.genQrcode)
    		self.save_button.clicked.connect(self.saveQrcode)
    		self.margin_spinbox.valueChanged.connect(self.genQrcode)
    		self.genQrcode()
    	'''生成二维码'''
    	def genQrcode(self):
    		content = self.content_edit.text()
    		try:
    			margin = int(self.margin_spinbox.text())
    		except:
    			margin = 0
    		size = int(self.size_combobox.currentText().split('*')[0])
    		qr = qrcode.QRCode(version=1,
    						   error_correction=qrcode.constants.ERROR_CORRECT_L,
    						   box_size=size//29,
    						   border=margin)
    		qr.add_data(content)
    		self.qr_img = qr.make_image()
    		fp = io.BytesIO()
    		self.qr_img.save(fp, 'BMP')
    		qimg = QtGui.QImage()
    		qim
    		filename = QFileDialog.getSaveFileName(self, '保存', './qrcode.png', '所有文件(*)')
    		if filename[0] != '':
    			self.qr_img.save(filename[0])
    			QDialog().show()
    
    
    if __name__ == '__main__':
    	
    	gui.show()
    	sys.exit(app.exec_())

[5407c829f4e7464785a515ab3982102f.png]: https://img-blog.csdnimg.cn/5407c829f4e7464785a515ab3982102f.png
[c7c3073dcb35482cb448ad98effae5ef.png]: https://img-blog.csdnimg.cn/c7c3073dcb35482cb448ad98effae5ef.png
[713ef9e9ae274d4e9f2725baf9426465.png]: https://img-blog.csdnimg.cn/713ef9e9ae274d4e9f2725baf9426465.png