pyQt5-lineEdit常用方法

# -*- coding:utf-8 -*-
"""
@Time:2022/3/23 17:55
@Author:小柠檬
@File:line_edit.py
"""
from PyQt5 import uic, QtCore
from PyQt5.QtCore import QRegExp
from PyQt5.QtGui import QRegExpValidator
from PyQt5.QtWidgets import QApplication


class LineEdit:
    # 只能单行编辑的文本框

    def __init__(self):
        # 加载UI界面
        self.ui = uic.loadUi("line_edit.ui")

        # 1.获取文本
        line_edit_text = self.ui.lineEdit.text()
        print(line_edit_text)

        # 2.设置提示
        self.ui.lineEdit_tip.setPlaceholderText('请输入小柠檬')

        # 3.设置文本
        self.ui.lineEdit.setText('我是设置的文本')

        # 4.清空文本
        self.ui.lineEdit.clear()

        # 5.正则限制输入
        regex = QRegExp(r'\d{6}')
        validator_regex = QRegExpValidator()
        validator_regex.setRegExp(regex)
        self.ui.lineEdit.setValidator(validator_regex)


def main():
    QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)  # 和designer设计的窗口比例一致
    app = QApplication([])
    line_edit = LineEdit()
    line_edit.ui.show()
    app.exec_()


if __name__ == '__main__':
    main()