Python PyQt5实战：SQLite数据库查询器完整实现流程
发布时间：2026-10-14| 5人浏览过
本文详细介绍基于Python PyQt5和SQLite3构建的数据库查询器项目。重点解析主界面与添加、删除、修改三个子界面的交互机制，包括信号槽通信、界面状态锁定及数据持久化逻辑。通过完整代码示例，展示如何实现数据的增删改查功能及自增ID重置处理，适合希望掌握PyQt5实战开发的开发者参考。
简介
本项目旨在利用PyQt5构建图形界面，底层对接sqlite3数据库，实现数据管理功能。核心难点在于主界面与多个子界面之间的交互逻辑，具体涉及一个主窗口与三个功能子窗口（添加、删除、修改）的协同工作，从而完成对数据库数据的增、删、改操作。
主界面
class MainWidget(QMainWindow):
def __init__(self):
super(MainWidget,self).__init__()
self.ui_init()
self.connect_init()
self.sql_init()
def ui_init(self):
self.setWindowTitle('信息查询')
self.resize(600,700)
self.addwidget = AddWidget()
self.deletewidget = DeleteWidget()
self.updatewidget = UpdateWidget()
self.show_view = QTextBrowser()
self.find_text = QLineEdit()
self.find_btn = QPushButton()
self.find_btn.setText('查询')
self.update_btn = QPushButton()
self.update_btn.setText('更改')
self.delete_btn = QPushButton()
self.delete_btn.setText('删除')
self.add_btn = QPushButton()
self.add_btn.setText('添加')
self.status_bar = self.statusBar()
self.widget = QWidget()
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.find_text)
self.h1_layout.addWidget(self.find_btn)
self.h2_layout.addWidget(self.update_btn)
self.h2_layout.addWidget(self.delete_btn)
self.h2_layout.addWidget(self.add_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addWidget(self.show_view)
self.widget.setLayout(self.v_layout)
self.setCentralWidget(self.widget)
def connect_init(self):
'''
信号与槽
'''
'''查询功能'''
self.find_btn.clicked.connect(lambda:self.find_slot(self.find_text.text()))
'''添加功能'''
self.add_btn.clicked.connect(self.add_slot)
self.addwidget.add_close_signal.connect(lambda:self.setEnabled(True))
self.addwidget.add_start_signal.connect(self.add_start_slot)
'''删除功能'''
self.delete_btn.clicked.connect(self.delete_slot)
self.deletewidget.delete_close_signal.connect(lambda:self.setEnabled(True))
self.deletewidget.delete_start_signal.connect(self.delete_start_slot)
'''更新功能'''
self.update_btn.clicked.connect(self.update_slot)
self.updatewidget.update_close_signal.connect(lambda:self.setEnabled(True))
self.updatewidget.update_name_signal.connect(self.update_name_slot)
self.updatewidget.update_show_signal.connect(self.update_show_slot)
def sql_init(self):
'''
sqllite3初始化
'''
try:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
cursor.close()
conn.close()
except:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('create table design (id integer PRIMARY KEY AUTOINCREMENT,name varchar(20),show varchar(100))')
cursor.close()
conn.close()
'''查询槽'''
def find_slot(self,content):
try:
result = self.find_func(content)
self.status_bar.showMessage('查询成功')
if result:
self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result)))
for i in range(len(result)):
self.show_view.append('id:' + str(result[i][0]))
self.show_view.append('名称：' + result[i][1])
self.show_view.append('说明：' + result[i][2])
else:
self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result)))
except Exception as e:
self.status_bar.showMessage('查询失败')
print(e)
'''添加槽'''
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失败')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
'''删除槽'''
def delete_slot(self):
self.deletewidget.show()
self.setEnabled(False)
def delete_start_slot(self,id):
try:
self.delete_func(id)
self.reset_func()
self.status_bar.showMessage('删除成功')
except Exception as e:
self.status_bar.showMessage('删除失败')
self.setEnabled(True)
self.deletewidget.close()
'''更新槽'''
def update_slot(self):
self.updatewidget.show()
self.setEnabled(False)
def update_name_slot(self,id,name):
try:
self.update_name_func(id,name)
self.status_bar.showMessage('更新名称成功')
except Exception as e:
self.status_bar.showMessage('更新名称失败')
self.setEnabled(True)
self.updatewidget.close()
def update_show_slot(self,id,name):
try:
self.update_show_func(id,name)
self.status_bar.showMessage('更新名称成功')
except Exception as e:
self.status_bar.showMessage('更新名称失败')
self.setEnabled(True)
self.updatewidget.close()
'''数据库函数'''
def insert_func(self,name,show):
'''
插入信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('insert into design (id,name,show) values (null,"{}","{}")'.format(name,show))
cursor.close()
conn.commit()
conn.close()
def find_func(self,content):
'''
查询信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('SELECT * FROM design WHERE name LIKE "%{}%"'.format(content))
result1 = cursor.fetchall()
cursor.close()
conn.close()
return result1
def count_func(self):
'''
信息数目
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
result = cursor.fetall()
count = len(result)
cursor.close()
conn.close()
return count
def update_name_func(self,id,name):
'''
更新名称信息
'''
print(id,name)
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set name = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def update_show_func(self,id,name):
'''
更新说明信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set show = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def delete_func(self,id):
'''
删除信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('delete from design where id = ?',(id,))
cursor.close()
conn.commit()
conn.close()
def reset_func(self):
'''
自增列归零
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'")
cursor.close()
conn.commit()
conn.close()
主界面类封装了数据库操作函数及与其他界面的交互逻辑。为确保数据一致性，当子界面处于打开状态时，主界面将被禁用（不可用）。子界面向主界面发送信号，而具体的功能实现代码均编写在主界面类中。子界面实例需在主界面中预先声明，例如：self.addwidget = AddWidget()
添加功能槽
'''添加槽'''
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失败')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
该函数用于启动添加界面，并将主界面设置为不可用状态，防止用户在其他界面操作。
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失败')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
此函数负责执行添加功能的核心逻辑，调用数据库插入函数。数据插入完成后，清除添加子界面中的文本内容，最后关闭该子界面。其他功能槽（如删除、修改）的实现逻辑与此类似。
def reset_func()
def reset_func(self):
'''
自增列归零
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'")
cursor.close()
conn.commit()
conn.close()
此函数作用有限，主要用于处理sqlite3数据库的系统表sqlite_sequence。当数据库创建时，该表会自动生成，包含两列：name（存储表名）和seq（保存对应表的RowID最大值）。当表中增加记录时，该表会自动更新；删除记录时，对应记录也会自动删除。原本希望实现数据删除后ID值重新更新，但该方法仅在所有数据全部删除时才会重置ID。
添加数据的界面
class AddWidget(QWidget):
'''
添加功能界面
'''
add_start_signal = pyqtSignal(str,str)
add_close_signal = pyqtSignal()
def __init__(self):
super(AddWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('添加信息')
self.setFixedSize(300,200)
self.name_text = QLineEdit()
self.show_text = QTextEdit()
self.start_btn = QPushButton()
self.start_btn.setText('添加')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.name_label = QLabel()
self.name_label.setText('名称：')
self.show_label = QLabel()
self.show_label.setText('说明：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.name_label)
self.h1_layout.addWidget(self.name_text)
self.h2_layout.addWidget(self.show_label)
self.h2_layout.addWidget(self.show_text)
self.h3_layout.addWidget(self.start_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
name = self.name_text.text()
show = self.show_text.toPlainText()
self.add_start_signal.emit(name,show)
def close_slot(self):
self.close()
self.add_close_signal.emit()
def closeEvent(self, event):
'''重写关闭事件'''
self.add_close_signal.emit()
这是添加数据的界面设计。自定义了两个信号：1. 添加数据信号：当按下添加按钮时，该界面向主界面传输两个字符串参数；2. 结束界面信号：无论是点击关闭按钮（重写了关闭事件）还是取消按钮，均向主界面发送信号，以恢复主界面的可用性。
删除数据的界面
class DeleteWidget(QWidget):
'''
删除功能界面
'''
delete_cancel_signal = pyqtSignal()
delete_start_signal = pyqtSignal(str)
delete_close_signal = pyqtSignal()
def __init__(self):
super(DeleteWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('删除信息')
self.setFixedSize(300,100)
self.id_text = QLineEdit()
self.start_btn = QPushButton()
self.start_btn.setText('删除')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.id_label = QLabel()
self.id_label.setText('要删除的id：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.start_btn)
self.h2_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
id = self.id_text.text()
self.delete_start_signal.emit(id)
def close_slot(self):
self.close()
self.delete_close_signal.emit()
def closeEvent(self, event):
self.delete_close_signal.emit()
这是删除数据的界面，其布局与之前的界面基本一致。
修改数据的界面
class UpdateWidget(QWidget):
'''
更新功能界面
'''
update_name_signal = pyqtSignal(int,str)
update_show_signal = pyqtSignal(int,str)
update_close_signal = pyqtSignal()
def __init__(self):
super(UpdateWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('修改信息')
self.setFixedSize(300,150)
self.content_text = QLineEdit()
self.id_text = QLineEdit()
self.name_btn = QPushButton()
self.name_btn.setText('修改名称')
self.show_btn = QPushButton()
self.show_btn.setText('修改说明')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.content_label = QLabel()
self.content_label.setText('修改内容：')
self.id_label = QLabel()
self.id_label.setText('选择id为:')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.content_label)
self.h2_layout.addWidget(self.content_text)
self.h3_layout.addWidget(self.name_btn)
self.h3_layout.addWidget(self.show_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.name_btn.clicked.connect(self.update_name_slot)
self.show_btn.clicked.connect(self.update_show_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def update_name_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_name_signal.emit(id,content)
def update_show_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_show_signal.emit(id,content)
def close_slot(self):
self.close()
self.update_close_signal.emit()
def closeEvent(self, event):
self.update_close_signal.emit()
此更新数据的界面，布局与之前的界面基本相同。
全部代码
import sys
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QPushButton, QTextEdit, QHBoxLayout, QVBoxLayout, QLineEdit, QLabel,QTextBrowser
import sqlite3
class MainWidget(QMainWindow):
def __init__(self):
super(MainWidget,self).__init__()
self.ui_init()
self.connect_init()
self.sql_init()
def ui_init(self):
self.setWindowTitle('信息查询')
self.resize(600,700)
self.addwidget = AddWidget()
self.deletewidget = DeleteWidget()
self.updatewidget = UpdateWidget()
self.show_view = QTextBrowser()
self.find_text = QLineEdit()
self.find_btn = QPushButton()
self.find_btn.setText('查询')
self.update_btn = QPushButton()
self.update_btn.setText('更改')
self.delete_btn = QPushButton()
self.delete_btn.setText('删除')
self.add_btn = QPushButton()
self.add_btn.setText('添加')
self.status_bar = self.statusBar()
self.widget = QWidget()
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.find_text)
self.h1_layout.addWidget(self.find_btn)
self.h2_layout.addWidget(self.update_btn)
self.h2_layout.addWidget(self.delete_btn)
self.h2_layout.addWidget(self.add_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addWidget(self.show_view)
self.widget.setLayout(self.v_layout)
self.setCentralWidget(self.widget)
def connect_init(self):
'''
信号与槽
'''
'''查询功能'''
self.find_btn.clicked.connect(lambda:self.find_slot(self.find_text.text()))
'''添加功能'''
self.add_btn.clicked.connect(self.add_slot)
self.addwidget.add_close_signal.connect(lambda:self.setEnabled(True))
self.addwidget.add_start_signal.connect(self.add_start_slot)
'''删除功能'''
self.delete_btn.clicked.connect(self.delete_slot)
self.deletewidget.delete_close_signal.connect(lambda:self.setEnabled(True))
self.deletewidget.delete_start_signal.connect(self.delete_start_slot)
'''更新功能'''
self.update_btn.clicked.connect(self.update_slot)
self.updatewidget.update_close_signal.connect(lambda:self.setEnabled(True))
self.updatewidget.update_name_signal.connect(self.update_name_slot)
self.updatewidget.update_show_signal.connect(self.update_show_slot)
def sql_init(self):
'''
sqllite3初始化
'''
try:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
cursor.close()
conn.close()
except:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('create table design (id integer PRIMARY KEY AUTOINCREMENT,name varchar(20),show varchar(100))')
cursor.close()
conn.close()
'''查询槽'''
def find_slot(self,content):
try:
result = self.find_func(content)
self.status_bar.showMessage('查询成功')
if result:
self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result)))
for i in range(len(result)):
self.show_view.append('id:' + str(result[i][0]))
self.show_view.append('名称：' + result[i][1])
self.show_view.append('说明：' + result[i][2])
else:
self.show_view.append('<font size="5" color="red">共查询 {} 条数据</font>'.format(len(result)))
except Exception as e:
self.status_bar.showMessage('查询失败')
print(e)
'''添加槽'''
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失败')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
'''删除槽'''
def delete_slot(self):
self.deletewidget.show()
self.setEnabled(False)
def delete_start_slot(self,id):
try:
self.delete_func(id)
self.reset_func()
self.status_bar.showMessage('删除成功')
except Exception as e:
self.status_bar.showMessage('删除失败')
self.setEnabled(True)
self.deletewidget.close()
'''更新槽'''
def update_slot(self):
self.updatewidget.show()
self.setEnabled(False)
def update_name_slot(self,id,name):
try:
self.update_name_func(id,name)
self.status_bar.showMessage('更新名称成功')
except Exception as e:
self.status_bar.showMessage('更新名称失败')
self.setEnabled(True)
self.updatewidget.close()
def update_show_slot(self,id,name):
try:
self.update_show_func(id,name)
self.status_bar.showMessage('更新名称成功')
except Exception as e:
self.status_bar.showMessage('更新名称失败')
self.setEnabled(True)
self.updatewidget.close()
'''数据库函数'''
def insert_func(self,name,show):
'''
插入信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('insert into design (id,name,show) values (null,"{}","{}")'.format(name,show))
cursor.close()
conn.commit()
conn.close()
def find_func(self,content):
'''
查询信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('SELECT * FROM design WHERE name LIKE "%{}%"'.format(content))
result1 = cursor.fetchall()
cursor.close()
conn.close()
return result1
def count_func(self):
'''
信息数目
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
result = cursor.fetchall()
count = len(result)
cursor.close()
conn.close()
return count
def update_name_func(self,id,name):
'''
更新名称信息
'''
print(id,name)
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set name = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def update_show_func(self,id,name):
'''
更新说明信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set show = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def delete_func(self,id):
'''
删除信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('delete from design where id = ?',(id,))
cursor.close()
conn.commit()
conn.close()
def reset_func(self):
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'")
cursor.close()
conn.commit()
conn.close()
class AddWidget(QWidget):
'''
添加功能界面
'''
add_start_signal = pyqtSignal(str,str)
add_close_signal = pyqtSignal()
def __init__(self):
super(AddWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('添加信息')
self.setFixedSize(300,200)
self.name_text = QLineEdit()
self.show_text = QTextEdit()
self.start_btn = QPushButton()
self.start_btn.setText('添加')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.name_label = QLabel()
self.name_label.setText('名称：')
self.show_label = QLabel()
self.show_label.setText('说明：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.name_label)
self.h1_layout.addWidget(self.name_text)
self.h2_layout.addWidget(self.show_label)
self.h2_layout.addWidget(self.show_text)
self.h3_layout.addWidget(self.start_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
name = self.name_text.text()
show = self.show_text.toPlainText()
self.add_start_signal.emit(name,show)
def close_slot(self):
self.close()
self.add_close_signal.emit()
def closeEvent(self, event):
self.add_close_signal.emit()
class DeleteWidget(QWidget):
'''
删除功能界面
'''
delete_cancel_signal = pyqtSignal()
delete_start_signal = pyqtSignal(str)
delete_close_signal = pyqtSignal()
def __init__(self):
super(DeleteWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('删除信息')
self.setFixedSize(300,100)
self.id_text = QLineEdit()
self.start_btn = QPushButton()
self.start_btn.setText('删除')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.id_label = QLabel()
self.id_label.setText('要删除的id：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.start_btn)
self.h2_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
id = self.id_text.text()
self.delete_start_signal.emit(id)
def close_slot(self):
self.close()
self.delete_close_signal.emit()
def closeEvent(self, event):
self.delete_close_signal.emit()
class UpdateWidget(QWidget):
'''
更新功能界面
'''
update_name_signal = pyqtSignal(int,str)
update_show_signal = pyqtSignal(int,str)
update_close_signal = pyqtSignal()
def __init__(self):
super(UpdateWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('修改信息')
self.setFixedSize(300,150)
self.content_text = QLineEdit()
self.id_text = QLineEdit()
self.name_btn = QPushButton()
self.name_btn.setText('修改名称')
self.show_btn = QPushButton()
self.show_btn.setText('修改说明')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.content_label = QLabel()
self.content_label.setText('修改内容：')
self.id_label = QLabel()
self.id_label.setText('选择id为:')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.content_label)
self.h2_layout.addWidget(self.content_text)
self.h3_layout.addWidget(self.name_btn)
self.h3_layout.addWidget(self.show_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.name_btn.clicked.connect(self.update_name_slot)
self.show_btn.clicked.connect(self.update_show_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def update_name_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_name_signal.emit(id,content)
def update_show_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_show_signal.emit(id,content)
def close_slot(self):
self.close()
self.update_close_signal.emit()
def closeEvent(self, event):
self.update_close_signal.emit()
if __name__ == '__main__':
app = QApplication(sys.argv)
dispaly = MainWidget()
dispaly.show()
sys.exit(app.exec_())
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