Qt第二十八章：异步

旧城等待， 2024-03-31 14:25 84阅读 0赞

**所有的数据处理都应该通过异步进行**

1.  定义信号  
    ![65228fbd9dda4457b5673e282786e888.png][]
    
        # 自定义信号源
        class QCustomSignal(QObject):
            signal_update_table = Signal(list)
            signal_get_token = Signal(str)
            signal_send_mq = Signal()
2.  处理函数  
    ![eaab3482007f45dcad3f0456c60a653b.png][]
    
        @Slot()
            def handle_search(self):
                def thread_function():
                    user_info = get_user_info(token=self.token, username=self.lineEdit.text())
                    # 发出信号
                    custom_signal.signal_update_table.emit(user_info)
        
                # 异步访问API并发出渲染信号
                Thread(target=thread_function).start()
        
                # 绑定信号的处理函数
                custom_signal.signal_update_table.connect(self.handle_search_render)
3.  渲染函数  
    ![69a49065e0084e65b4b2eb118543c331.png][]
    
        @Slot(list)
            def handle_search_render(self, user_info):
                self.user_info = user_info
                # QTableWidget句柄
                widget: QTableWidget = self.tableWidget
                # 设置行数
                widget.setRowCount(len(user_info))
                # 设置列数
                widget.setColumnCount(5)
                # 设置表头
                widget.setHorizontalHeaderLabels(["姓名", "组织", "手机号码", "操作", "检测"])
        
                # 设置表头宽度自适应
                widget.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
                widget.horizontalHeader().setSectionResizeMode(0, QHeaderView.Fixed)
                widget.horizontalHeader().setSectionResizeMode(2, QHeaderView.Fixed)
                widget.horizontalHeader().setSectionResizeMode(3, QHeaderView.Fixed)
                widget.horizontalHeader().setSectionResizeMode(4, QHeaderView.Fixed)

[65228fbd9dda4457b5673e282786e888.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/f4441592d1244ecf8ef781a9f24d3414.png
[eaab3482007f45dcad3f0456c60a653b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/b57c7df8b5224d2d9d473f9ccb939338.png
[69a49065e0084e65b4b2eb118543c331.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/31/307712091a9949b684cd1dbcfb20a72b.png