PyQt5 控件字体样式等设置

<div class="title_1">1、API接口设置</div> - 好比我这段代码中的一些设置，设置文字、居中、禁止复制、LineEdit输入为password等等

import sys

from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QFrame
from PyQt5.QtWidgets import QLabel
from PyQt5.QtWidgets import QWidget
from PyQt5.QtWidgets import QLineEdit
from PyQt5.QtWidgets import QTextEdit
from PyQt5.QtWidgets import QSizePolicy
from PyQt5.QtWidgets import QMainWindow
from PyQt5.QtWidgets import QPushButton
from PyQt5.QtWidgets import QGridLayout
from PyQt5.QtWidgets import QApplication




from View import interface

class MainWindow(QMainWindow):

    def __init__(self):
        super(MainWindow,self).__init__(None)
        self.setWindowTitle("对金属腐蚀性试验仪")
        self.initUI()

    def initUI(self):
        layout = QGridLayout()
        layout.setSpacing(10)
        self.loginLabel = QLabel("用户名：")
        self.loginLabel.setAlignment(Qt.AlignRight)
        self.loginLabel.setStyleSheet("color:rgb(20,20,20,255);font-size:16px;font-weight:bold:text")
        self.loginTxt = QLineEdit()
        self.loginTxt.setText("admin")
        self.loginTxt.setPlaceholderText("User Name")
        self.loginTxt.setClearButtonEnabled(True)
        self.pwdLabel = QLabel("密码：")
        self.pwdLabel.setAlignment(Qt.AlignRight)
        self.pwdTxt = QLineEdit()
        self.pwdTxt.setContextMenuPolicy(Qt.NoContextMenu) #禁止复制粘贴
        self.pwdTxt.setPlaceholderText("Password")
        self.pwdTxt.setText("admin")
        self.pwdTxt.setEchoMode(QLineEdit.Password)
        self.pwdTxt.setClearButtonEnabled(True)
        self.registeredBtn = QPushButton("注册")
        self.loginBtn = QPushButton("登录")

        self.headLabel = QLabel("用户登录")
        self.headLabel.resize(300,30)
        self.headLabel.setAlignment(Qt.AlignCenter)
        self.headLabel.setStyleSheet("color:rgb(10,10,10,255);font-size:25px;font-weight:bold;font-family:Roman times;")

        self.headLabel.setSizePolicy(QSizePolicy.Expanding,QSizePolicy.Expanding)
        layout.addWidget(self.headLabel,0,0,1,2)
        policy = self.headLabel.sizePolicy()
        print(policy.verticalPolicy())
        policy.setVerticalPolicy(1)
        print(policy.verticalPolicy())
        # policy.setVerticalPolicy(1)
        layout.addWidget(self.loginLabel,1,0)
        layout.addWidget(self.loginTxt,1,1)
        layout.addWidget(self.pwdLabel,2,0)
        layout.addWidget(self.pwdTxt,2,1)
        layout.addWidget(self.registeredBtn,3,0)
        layout.addWidget(self.loginBtn,3,1)

        frame = QFrame(self)
        frame.setLayout(layout)
        self.setCentralWidget(frame)
        self.resize(300,150)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    mainWindow.activateWindow()
    mainWindow.raise_()
    app.exec_()
    del mainWindow
    del app

<div class="title_3">1.1.0 QLineEdit一些属性</div>

inputMask设置掩码 text 设置文本 maxLength文本框输入的最大字符数 frame 设置边框 echoMode 设置文本框显示格式 Normal正常显示所输入的字符，此为默认选项 NoEcho不显示任何输入的字符，经常使用于密码类型的输入，且长度保密 Password显示与平台相关的密码掩饰字符，而不是实际输入的字符 PasswordEchoOnEdit在编辑时显示字符，负责显示密码类型的输入 cursorPosition光标位置 alignment文本对齐方式 AlignLeft左对齐 AlignRight右对齐 AlignCenter水平居中对齐 AlignJustify水平方向调整间距两端对齐 AlignTop垂直上对齐 AlignBottom垂直方下对齐 AlignVCenter垂直方向居中对齐 dragEnabled设置文本框是否接受拖动 readOnly设置文本为只读 placeholderText设置文本框提示文字 cursorMoveStyle光标移动风格 LogicalMoveStyle逻辑风格 VisualMoveStyle视觉风格 clearButtonEnabled快速删除按钮

<a style="color:red;font-size:20px;" href="https://zhuanlan.zhihu.com/p/57146150" target="_blank">参考文章,QLineEdit属性、信号、方法等</a>

<div class="title_2">1.1 经常使用的一些设置</div>

• setAlignment(self, Union, Qt_Alignment=None,Qt_AlignmentFlag=None): 设置字体对齐方式

参数	做用
AlignAbsolute=16
AlignBaseline=256
AlignBottom=64	底端对齐
AlignCenter=132	彻底居中
AlignHCenter=4	水平居中
AlignHorizontal_Mask=31
AlignJustify=8	可用空间对齐
AlignLeading=1	领头对齐(理解为左对齐吧)
AlignLeft=1	左对齐
AlignRight=2	右对齐
AlignTop=32	上对齐
AlignTrailing=2	尾对齐(右对齐
AlignVCenter=128	垂直居中

• setClearButtonEnabled(self, bool): 是否有清除文本按钮(如我第一段程序文本框后的 小黑X)
• setCompleter(self, QCompleter):设置自动补全<a href="https://www.cnblogs.com/shiqi17/p/12176497.html" target="_blank">QLineEdit自动补全</a>

• setCursorMoveStyle(self, Qt_CursorMoveStyle):
• setCursorPosition(self, p_int):
• setDragEnabled(self, bool):
• setEchoMode(self, QLineEdit_EchoMode):
• setFrame(self, bool):
• setInputMask(self, p_str):
• setMaxLength(self, p_int):
• setModified(self, bool):
• setPlaceholderText(self, p_str):
• setReadOnly(self, bool):
• setSelection(self, p_int, p_int_1):
• setText(self, p_str):
• setTextMargins(self, *__args):
• setValidator(self, QValidator):