1.QInputDialog简介

PyQt5中QInputDialog用于创建简单的输入对话框，允许输入文本、数字等信息。可以非常方便地用于收集用户的输入。

2.QInputDialog案例

import sys
from PyQt5.QtWidgets import QApplication, QPushButton, QFormLayout, QInputDialog, QWidget, QLineEdit


# 输入对话框
class QInputDialogDemo(QWidget):
    def __init__(self):
        super().__init__()
        self.init_ui()

    def init_ui(self):
        self.setWindowTitle('QInputDialog')
        self.resize(600, 400)
        f_layout = QFormLayout(self)

        btn1 = QPushButton()
        btn1.setText('获取列表数据')
        self.edit1 = QLineEdit()
        btn1.clicked.connect(self.get_item)

        btn2 = QPushButton()
        btn2.setText('获取字符串')
        self.edit2 = QLineEdit()
        btn2.clicked.connect(self.get_text)

        btn3 = QPushButton()
        btn3.setText('获取整数')
        self.edit3 = QLineEdit()
        btn3.clicked.connect(self.get_int)

        btn4 = QPushButton()
        btn4.setText('获取浮点数')
        self.edit4 = QLineEdit()
        btn4.clicked.connect(self.get_double)

        f_layout.addRow(btn1, self.edit1)
        f_layout.addRow(btn2, self.edit2)
        f_layout.addRow(btn3, self.edit3)
        f_layout.addRow(btn4, self.edit4)

    def get_item(self):
        items = ['python', 'java', 'c++', 'go']

        # 方式1
        qid = QInputDialog(self)
        qid.setOkButtonText('确认')  # 按钮改为中文
        qid.setCancelButtonText('取消')
        qid.setWindowTitle('请选择语言')  # 窗口标题
        qid.setLabelText('语言列表')  # 描述内容
        qid.setComboBoxItems(items)  # 下拉选项

        status = qid.exec()
        print(status)
        value = qid.textValue()  # 获取选中的结果
        if status and value:
            self.edit1.setText(value)

        # 方式2
        # 获取下拉列表选择结果, 返回选择的结果和点击的确认或取消
        # item, status = QInputDialog.getItem(self, '请选择语言', '语言列表', items)
        # print(item, status)
        # if item and status:
        #     self.edit1.setText(item)

    def get_text(self):
        text, status = QInputDialog.getText(self, '请输入姓名', '姓名')
        if text and status:
            self.edit2.setText(text)

    def get_int(self):
        num, status = QInputDialog.getInt(self, '整数输入框', '整数', min=-2147483647, max=2147483647, step=1)
        if num and status:
            self.edit3.setText(str(num))

    def get_double(self):
        double, status = QInputDialog.getDouble(self, '浮点数输入框', '浮点数', value=0.0, min=-1e+37, max=1e+37, decimals=2)
        if double and status:
            self.edit4.setText(str(double))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = QInputDialogDemo()
    w.show()
    sys.exit(app.exec())

3.运行结果

4.常用方法