正確啓動及終止線程
https://blog.csdn.net/czyt1988/article/details/64441443
https://blog.csdn.net/czyt1988/article/details/71194457
QThread (信號與槽)
https://blog.csdn.net/LynFam/article/details/7081757、
Qt線程同步的幾種方法
https://blog.csdn.net/hulifangjiayou/article/details/47018895