Qt 通过 lambda 表达式捕获信号发送对象

使用 Lambda 表达式捕获按钮对象

通过 Lambda 表达式连接信号和槽时，可以直接捕获按钮对象。

#include <QApplication>
#include <QPushButton>
#include <QDebug>

class MyWidget : public QWidget {
    Q_OBJECT
public:
    MyWidget() {
        QPushButton *button1 = new QPushButton("Button 1", this);
        QPushButton *button2 = new QPushButton("Button 2", this);

        connect(button1, &QPushButton::clicked, [this, button1]() {
            onButtonClicked(button1);
        });

        connect(button2, &QPushButton::clicked, [this, button2]() {
            onButtonClicked(button2);
        });

        button1->move(50, 50);
        button2->move(50, 100);
    }

private:
    void onButtonClicked(QPushButton *button) {
        qDebug() << "Button clicked:" << button->text();
    }
};

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    MyWidget widget;
    widget.resize(200, 200);
    widget.show();

    return app.exec();
}

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