QT 为按钮添加事件
转自：https://blog.csdn.net/a1054359972/article/details/50748642?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2
