必须使用函数指针,否者报错

未带参数的可以不用函数指针也可以用

例子:

使用函数指针 调用带参数信号和槽

 void( Teacher::*teacherSignal)(QString) = &Teacher::hungry;void( Student::*studentSignal)(QString) = &Student::treat;connect(bhw,teacherSignal,twh,studentSignal);

使用函数指针 调用不带参数的信号

 void( Teacher::*teacherSignal)(void) = &Teacher::hungry;void( Student::*studentSignal)(void) = &Student::treat;connect(bhw,teacherSignal,twh,studentSignal);