Python3使用QT编写基础的对话框程序的详细流程

# PyQt5安装（GPL协议）
pip install pyqt5
 
# 或PySide6安装（LGPL协议，商业友好）
pip install pyside6

import sys
from PyQt5.QtWidgets import QApplication, QDialog, QLabel
 
app = QApplication(sys.argv)
dialog = QDialog()
dialog.setWindowTitle("我的第一个对话框")
dialog.resize(300, 200)
 
label = QLabel("欢迎使用Qt对话框！", dialog)
label.move(100, 80)  # 手动定位控件
 
dialog.show()
sys.exit(app.exec_())

from PyQt5.QtWidgets import (QDialog, QLabel, QLineEdit, 
                            QPushButton, QVBoxLayout)
 
class LoginDialog(QDialog):
    def __init__(self):
        super().__init__()
        self.setup_ui()
 
    def setup_ui(self):
        self.setWindowTitle("登录窗口")
        self.resize(300, 150)
 
        # 创建控件
        self.user_label = QLabel("用户名：")
        self.user_input = QLineEdit()
        self.pwd_label = QLabel("密码：")
        self.pwd_input = QLineEdit(echoMode=QLineEdit.Password)
        self.login_btn = QPushButton("登录")
 
        # 布局管理
        layout = QVBoxLayout()
        layout.addWidget(self.user_label)
        layout.addWidget(self.user_input)
        layout.addWidget(self.pwd_label)
        layout.addWidget(self.pwd_input)
        layout.addWidget(self.login_btn)
        self.setLayout(layout)

from PyQt5.QtCore import pyqtSlot
 
class LoginDialog(QDialog):
    # ... 前面的UI代码 ...
 
    @pyqtSlot()
    def on_login_btn_clicked(self):
        username = self.user_input.text()
        password = self.pwd_input.text()
        print(f"尝试登录：{username}/{password}")
 
    def setup_ui(self):
        # ... 前面的控件创建 ...
        self.login_btn.clicked.connect(self.on_login_btn_clicked)

def show_modal_dialog(self):
    dialog = QDialog(self)
    dialog.setModal(True)
    dialog.exec_()  # 阻塞式显示

def show_modeless_dialog(self):
    dialog = QDialog(self)
    dialog.setAttribute(Qt.WA_DeleteOnClose)
    dialog.show()  # 非阻塞显示

from PyQt5.QtWidgets import QMessageBox
 
QMessageBox.information(self, "提示", "操作成功！")
QMessageBox.warning(self, "警告", "磁盘空间不足！")

# 设置全局样式
app.setStyleSheet("""
    QDialog {
        background: #f0f0f0;
        border: 1px solid #ccc;
    }
    QPushButton {
        background: #4CAF50;
        color: white;
        padding: 5px;
        border-radius: 3px;
    }
    QPushButton:hover {
        background: #45a049;
    }
""")
 
# 或设置单个控件样式
self.login_btn.setStyleSheet("font-weight: bold;")

pip install pyinstaller
pyinstaller --onefile --windowed your_script.py