from PySide6.QtCore import QObject, Signal

# 定義自定義信號(hào)（可指定參數(shù)類型）
class MyBusinessLogic(QObject):
    # 無參數(shù)信號(hào)
    task_started = Signal()
    # 帶參數(shù)信號(hào)（支持多類型、多參數(shù)）
    task_progress = Signal(int, str)  # 進(jìn)度值 + 提示文本
    task_finished = Signal(bool, str) # 是否成功 + 結(jié)果信息

# 使用自定義信號(hào)
logic = MyBusinessLogic()
# 綁定槽函數(shù)
logic.task_progress.connect(lambda value, msg: print(f"進(jìn)度：{value}%，{msg}"))
# 發(fā)射信號(hào)（觸發(fā)事件）
logic.task_progress.emit(50, "正在處理數(shù)據(jù)...")

import sys
from PySide6.QtWidgets import QApplication, QWidget, QPushButton
from PySide6.QtCore import Slot

class Demo(QWidget):
    def __init__(self):
        super().__init__()
        self.btn = QPushButton("點(diǎn)我觸發(fā)信號(hào)", self)
        # 信號(hào)：btn.clicked → 發(fā)生了“按鈕被點(diǎn)擊”這件事
        self.btn.clicked.connect(self.handle_click)

    # 槽：handle_click → 收到“按鈕被點(diǎn)擊”信號(hào)后，要做的事
    @Slot()
    def handle_click(self):
        print("信號(hào)：按鈕被點(diǎn)擊了 → 槽：執(zhí)行打印操作")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = Demo()
    win.show()
    sys.exit(app.exec())

import sys
from PySide6.QtWidgets import QApplication, QWidget, QSlider
from PySide6.QtCore import Slot

class Demo(QWidget):
    def __init__(self):
        super().__init__()
        self.slider = QSlider(self)
        self.slider.setRange(0, 100)
        # 信號(hào)：valueChanged → 發(fā)生了“滑塊值變化”這件事，附帶“當(dāng)前值”這個(gè)信息
        self.slider.valueChanged.connect(self.handle_slider)

    # 槽：handle_slider → 收到“滑塊值變化”信號(hào)后，根據(jù)附帶的數(shù)值做對(duì)應(yīng)操作
    @Slot(int)
    def handle_slider(self, value):  # value 是信號(hào)附帶的“相關(guān)信息”
        print(f"信號(hào)：滑塊值變了 → 槽：當(dāng)前值是{value}，執(zhí)行打印")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = Demo()
    win.show()
    sys.exit(app.exec())