c – 删除对象后触发的QTimer :: SingleShot

// Example class
class A : public QObject
{
   Q_OBJECT
   void fun() {
       Timer::SingleShot(10, timerSlot); //rough code
   }
   public slot:
   void timerSlot();
}

auto a = SharedPointer<A>(new A);
a->fun();
a->reset(); // a deleted

在这种情况下删除a并触发计时器后,它会执行timerSlot()吗？我得到了一次非常罕见的崩溃,并且不确定是不是因为这个逻辑中有些可疑.

解决方法:

即使计时器触发,也不会触发插槽. ~QObject状态的文档：All signals to and from the object are automatically disconnected, and any pending posted events for the object are removed from the event queue.如果你使用线程,你可以同时触发A :: timerSlot并删除A的唯一方法.

标签：c,qt,qt5,qtimer,qeventloop
来源： https://codeday.me/bug/20190722/1502730.html