pyside2 widget界面去除边框后 添加放大 缩小 关闭按钮并可以鼠标拖动界面移动 鼠标控制界面上行左右伸缩的代码实现

你可以使用以下代码实现：

from PySide2.QtCore import Qt
from PySide2.QtGui import QIcon
from PySide2.QtWidgets import QWidget, QHBoxLayout, QLabel, QPushButton

class CustomTitleBar(QWidget):
    def __init__(self, parent=None):
        super(CustomTitleBar, self).__init__(parent)

        self.setWindowTitle("CustomTitleBar")
        self.setFixedHeight(30)
        self.setContentsMargins(0, 0, 0, 0)

        layout = QHBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setSpacing(0)

        self.title_label = QLabel(self)
        self.title_label.setAlignment(Qt.AlignCenter)
        self.title_label.setText("CustomTitleBar")

        layout.addWidget(self.title_label)

        # Add minimize button
        self.minimize_button = QPushButton(self)
        self.minimize_button.setIcon(QIcon("minimize.png"))
        self.minimize_button.setFixedSize(30, 30)
        self.minimize_button.clicked.connect(self.parent().showMinimized)

        layout.addWidget(self.minimize_button)

        # Add maximize button
        self.maximize_button = QPushButton(self)
        self.maximize_button.setIcon(QIcon("maximize.png"))
        self.maximize_button.setFixedSize(30, 30)
        self.maximize_button.clicked.connect(self.toggleMaximized)

        layout.addWidget(self.maximize_button)

        # Add close button
        self.close_button = QPushButton(self)
        self.close_button.setIcon(QIcon("close.png"))
        self.close_button.setFixedSize(30, 30)
        self.close_button.clicked.connect(self.parent().close)

        layout.addWidget(self.close_button)

    def toggleMaximized(self):
        if self.parent().isMaximized():
            self.parent().showNormal()
            self.maximize_button.setIcon(QIcon("maximize.png"))
        else:
            self.parent().showMaximized()
            self.maximize_button.setIcon(QIcon("restore.png"))

class CustomWidget(QWidget):
    def __init__(self):
        super(CustomWidget, self).__init__()

        self.setWindowTitle("CustomWidget")
        self.setWindowFlags(Qt.FramelessWindowHint)
        self.setAttribute(Qt.WA_TranslucentBackground)

        layout = QHBoxLayout(self)
        layout.setContentsMargins(0, 0, 0, 0)
        layout.setSpacing(0)

        self.title_bar = CustomTitleBar(self)
        layout.addWidget(self.title_bar)

        # Add your content widgets here
        # ...

        self.show()

    def mousePressEvent(self, event):
        if event.button() == Qt.LeftButton:
            self.drag_position = event.globalPos() - self.frameGeometry().topLeft()
            event.accept()

    def mouseMoveEvent(self, event):
        if event.buttons() == Qt.LeftButton:
            self.move(event.globalPos() - self.drag_position)
            event.accept()

    def resizeEvent(self, event):
        super(CustomWidget, self).resizeEvent(event)

        # Update the title bar width to match the widget width
        self.title_bar.setFixedWidth(self.width())

    def paintEvent(self, event):
        super(CustomWidget, self).paintEvent(event)

        # Draw a border around the widget
        painter = QPainter(self)
        painter.setPen(QPen(Qt.black, 1))
        painter.drawRect(self.rect().adjusted(0, 0, -1, -1))

这个代码创建了一个自定义窗口，其中包含了一个自定义的标题栏和一个可以自由放置的内容部件。标题栏中包含了最小化、最大化、还原和关闭按钮，可以拖动窗口移动，鼠标控制窗口上下左右伸缩。

需要注意的是，为了使窗口可以自由伸缩，需要在 `resizeEvent` 中更新标题栏的宽度，否则标题栏会超出窗口边界。同时，为了使窗口可以拖动，需要在 `mousePressEvent` 和 `mouseMoveEvent` 中实现拖动逻辑。窗口的边框可以在 `paintEvent` 中绘制出来，这里使用了 `QPainter` 类。