PyQt5之QLineEdit控件与回显模式(EchoMode)

QLineEdit有4种回显模式(EchoMode)：
1.Normal
2.NoEcho
3.Password
4.PasswordEchoOnEdit

from PyQt5.QtWidgets import *
import sys

class QLineEditEchoMode(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle("文本输入框的回显模式")

        formLayout = QFormLayout()

        normalLineEdit = QLineEdit()
        noEchoLineEdit = QLineEdit()
        passwordLineEdit = QLineEdit()
        passwordEchoNoEditLineEdit = QLineEdit()

        formLayout.addRow("normal", normalLineEdit)
        formLayout.addRow("NoEcho", noEchoLineEdit)
        formLayout.addRow("Password", passwordLineEdit)
        formLayout.addRow("PasswordEchoOnEdit", passwordEchoNoEditLineEdit)

        # placeholdertext设置提示

        normalLineEdit.setPlaceholderText("Normal")
        noEchoLineEdit.setPlaceholderText("NoEcho")
        passwordLineEdit.setPlaceholderText("Password")
        passwordEchoNoEditLineEdit.setPlaceholderText("PasswordEchoOnEdit")

        normalLineEdit.setEchoMode(QLineEdit.Normal)
        noEchoLineEdit.setEchoMode(QLineEdit.NoEcho)
        passwordLineEdit.setEchoMode(QLineEdit.Password)
        passwordEchoNoEditLineEdit.setEchoMode(QLineEdit.PasswordEchoOnEdit)

        self.setLayout(formLayout)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = QLineEditEchoMode()
    main.show()
    sys.exit(app.exec_())

运行后结果：

输入后效果：