麻烦整合成一个完整的代码可以吗

当然可以。这是一个完整的Python应用代码示例，包含了上述描述的功能：

# 导入所需库
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QLineEdit, QPushButton, QMessageBox, QVBoxLayout, QGridLayout
from PyQt5.QtCore import Qt

class RegistrationForm(QWidget):
    def __init__(self):
        super().__init__()
        self.init_ui()

    def init_ui(self):
        self.setWindowTitle('用户注册')
        self.setGeometry(100, 100, 300, 200)

        # 创建布局
        grid_layout = QGridLayout()

        name_label = QLabel('姓名:')
        self.name_input = QLineEdit()
        grid_layout.addWidget(name_label, 0, 0)
        grid_layout.addWidget(self.name_input, 0, 1)

        gender_label = QLabel('性别:')
        self.gender_input = QLineEdit()
        grid_layout.addWidget(gender_label, 1, 0)
        grid_layout.addWidget(self.gender_input, 1, 1)

        hobby_label = QLabel('爱好:')
        self.hobby_input = QLineEdit()
        grid_layout.addWidget(hobby_label, 2, 0)
        grid_layout.addWidget(self.hobby_input, 2, 1)

        submit_button = QPushButton('提交', clicked=self.show_confirmation)
        grid_layout.addWidget(submit_button, 3, 0, 1, 2)

        self.setLayout(grid_layout)

    def show_confirmation(self):
        name = self.name_input.text()
        gender = self.gender_input.text()
        hobby = self.hobby_input.text()

        if not all([name, gender, hobby]):
            QMessageBox.warning(self, '错误', '请填写完整信息')
        else:
            QMessageBox.information(self, '确认', f'已记录：\n姓名：{name}\n性别：{gender}\n爱好：{hobby}')

if __name__ == "__main__":
    app = QApplication(sys.argv)
    form = RegistrationForm()
    form.show()
    sys.exit(app.exec_())

这个代码创建了一个简单的用户注册表单，包含了姓名、性别和爱好的输入框，以及一个提交按钮。当点击提交按钮时，会检查输入信息是否齐全，并在满足条件时显示确认消息。