PyQT QObject::startTimer: Timers can only be used with threads started with QThread
故障描述：
在線程中設置了statusbar.showMessage（） 或者設置了其它Ui部件的值或狀態，會出現這個錯誤。
處理方法：
避免線程中直接設置UI部件的狀態，應該使用自定義信號和槽的方式，間隔調用設置Ui的方法。
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