PYQT常用代码（不定时更新）

隐藏状态栏，自己写缩小关闭的按钮，实现窗口拖动

		#写在构建函数中
        self.setWindowFlags(QtCore.Qt.FramelessWindowHint)	#隐藏状态栏
        self.pushButton_3.clicked.connect(self.close)  #关闭窗口,pushButton_3替换成自己的控件名
        self.pushButton_2.clicked.connect(self.showMinimized)	#最小化窗口,pushButton_2替换成自己的控件名

    def mousePressEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            self.m_flag = True
            self.m_Position = event.globalPos() - self.pos()  # 获取鼠标相对窗口的位置
            event.accept()
            self.setCursor(QtGui.QCursor(QtCore.Qt.OpenHandCursor))  # 更改鼠标图标

    def mouseMoveEvent(self, QMouseEvent):
        if QtCore.Qt.LeftButton and self.m_flag:
            self.move(QMouseEvent.globalPos() - self.m_Position)  # 更改窗口位置
            QMouseEvent.accept()

    def mouseReleaseEvent(self, QMouseEvent):
        self.m_flag = False
        self.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor))

静态启动界面（解决鼠标点击消失的bug）

import sys
import time
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QFont, QPixmap
from PyQt5.QtWidgets import QSplashScreen, qApp

#启动界面的类
class SplashPanel(QSplashScreen):
    def __init__(self):
        super(SplashPanel, self).__init__()
        message_font = QFont()  #设置字体效果
        message_font.setBold(True)
        message_font.setPointSize(14)
        self.setFont(message_font)
        pixmap = QPixmap("C:/Users/Administrator/Desktop/login_picture/start.jpg") #启动界面图片
        self.setPixmap(pixmap)
        # self.showMessage('正在加载文件资源', alignment=Qt.AlignBottom, color=Qt.black)
        self.show()
        for i in range(1, 5):
            self.showMessage('正在打开应用{}'.format('.' * i), alignment=Qt.AlignBottom, color=Qt.black)
            time.sleep(0.15)

    def mousePressEvent(self, evt):
        pass
        # 重写鼠标点击事件，阻止点击后消失
    def mouseDoubleClickEvent(self, *args, **kwargs):
        pass
        # 重写鼠标移动事件，阻止出现卡顿现象
    def enterEvent(self, *args, **kwargs):
        pass
        # 重写鼠标移动事件，阻止出现卡顿现象
    def mouseMoveEvent(self, *args, **kwargs):
        pass
        # 重写鼠标移动事件，阻止出现卡顿现象

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    splash = SplashPanel()  #加载启动界面
    qApp.processEvents()    #启动画面不阻碍主界面的加载待主界面加载显示完成后，
    # 启动画面就会结束，同时结束掉启动画面的进程，分别调用了finish方法和deletelater方法。
    demo = ex()
    demo.show()     # 启动登陆界面
    splash.finish(demo)
    splash.deleteLater()
    sys.exit(app.exec_())