「深度学习福利」大神带你进阶工程师，立即查看>>> #include "widget.h" #include <QPushButton> Widget::Widget(QWidget *parent) : QWidget(parent) { _button = new QPushButton("this button", this); connect(_button, SIGNAL(clicked()), this, SLOT(close())); /*button 给自己安装了一个消息过滤器，那么经过button的消息，都要调用它的消息过滤器函数*/ _button->installEventFilter(this); } #include <QMouseEvent> bool Widget::eventFilter(QObject *watched, QEvent *event) { if(watched == _button){ if(event->type() == QEvent::MouseButtonRelease){ return true; } } return QWidget::eventFilter(watched, event); }