【QTdesigner】课时32.QLineEdit控件与回显模式（EchoMode）【pyqt5+QTdesigner模式】

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老师原课件下载地址：
有积分的朋友，支持下我，打赏也OK。
不下载也可以，我每节课会吧代码贴出来

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视频链接

P31课时32.QLineEdit控件与回显模式（EchoMode）

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课程重点

四种回显模式

1. Normal >>> 输入什么显示什么
2. NoEcho >>> 输入什么不显示，但是已经提交了
3. Password >>> 输入什么都显示 ****
4. PasswordEchoOnEdit >>> 输入什么,丢失目标以后显示*****

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代码位置

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完整代码

'''

QLineEdit控件与回显模式

基本功能：输入单行的文本

EchoMode（回显模式）

4种回显模式

1. Normal   输入什么显示什么
2. NoEcho   输入什么不显示，但是已经提交了
3. Password   输入什么都显示 ****
4. PasswordEchoOnEdit   输入什么,丢失目标以后显示*****


Mac : Command    Windows:Control
'''
from PyQt5.QtWidgets import *
import sys

class QLineEditEchoMode(QWidget) :
    def __init__(self):
        super(QLineEditEchoMode,self).__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()
        passwordEchoOnEditLineEdit = QLineEdit()

        formLayout.addRow("Normal",normalLineEdit)
        formLayout.addRow("NoEcho", noEchoLineEdit)
        formLayout.addRow("Password",passwordLineEdit)
        formLayout.addRow("PasswordEchoOnEdit",passwordEchoOnEditLineEdit)

        # placeholdertext

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

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

        self.setLayout(formLayout)

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

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遇到的问题

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改写效果展示

尺寸啥的自己调整，效果达到了就行

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改写注意点

class QLineEditEchoMode(QWidget) :

formLayout = QFormLayout()
normalLineEdit = QLineEdit()
noEchoLineEdit = QLineEdit()
passwordLineEdit = QLineEdit()
passwordEchoOnEditLineEdit = QLineEdit()

formLayout.addRow("Normal",normalLineEdit)
formLayout.addRow("NoEcho", noEchoLineEdit)
formLayout.addRow("Password",passwordLineEdit)
formLayout.addRow("PasswordEchoOnEdit",passwordEchoOnEditLineEdit)

全选四个，然后拖到框里

一个一个往里拖呗

Form可以随便选一个，这样可以起到自动调整大小的效果
formlayout 选择adjust size， 自己体会吧

这里不做解释了，text快速查找，不懂的，看课时30
设置标签名

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

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

一看就懂，不解释

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改写代码（QTdesigner模式）

# -*- coding:utf-8 -*-
'''
@Author: knocky
@Blog: https://blog.csdn.net/zzx188891020
@E-mail: [email protected]
@File: class32.py
@CreateTime: 2020/5/8 17:19
'''

import sys
from PyQt5.QtWidgets import QApplication
from PyQt5 import uic

class QLabelDemo() :
    def __init__(self):
        super().__init__()
        self.ui = uic.loadUi("../ui_package/class32.ui")

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