D:\HTproject\taijitu\main.cpp:40: error: 'class QString' has no member named 'reversed'; did you mean 'reserve'? ..\taijitu\main.cpp:40:37: error: 'class QString' has no member named 'reversed'; did you mean 'reserve'? label

抱歉，我之前给出的代码存在错误。在Qt中，QString类没有名为reversed()的方法。正确的方法是使用reverse()。

这里是修改后的代码：

#include <QtWidgets>

class DoorCoupletWidget : public QWidget {
public:
    DoorCoupletWidget(QWidget *parent = nullptr) : QWidget(parent) {
        setupUi();
    }

private:
    void setupUi() {
        setFixedSize(400, 200);

        QFont font("Arial", 20);

        QLabel *label_1 = new QLabel(this);
        label_1->setText("春");
        label_1->setFont(font);
        label_1->setAlignment(Qt::AlignCenter);
        label_1->move(100, 50);

        QLabel *label_2 = new QLabel(this);
        label_2->setText("节");
        label_2->setFont(font);
        label_2->setAlignment(Qt::AlignCenter);
        label_2->move(250, 50);

		QLineEdit *lineEdit_1 = new QLineEdit(this);
		lineEdit_1->setFont(font);
		lineEdit_1->setFixedSize(100, 30);
		lineEdit_1->move(90, 120);

		QLineEdit *lineEdit_2 = new QLineEdit(this);
		lineEdit_2->setFont(font);
		lineEdit_2->setFixedSize(100, 30);
		lineEdit_2->move(240, 120);

         connect(lineEdit_1,&QLineEdit::textChanged,this ,[=](){
            QString text = lineEdit_1 ->text();
            label _11 ->setText(text );
			QString reversedText = text;
			std::reverse(reversedText.begin(), reversedText.end());
			label _22 -> setText(reversedText);

          });

		  connect(lineEdit _2 ,&QLineEdit::textChanged,this ,[=](){
             QString text= lineEdit _2 - >text () ;
             label _21 - >setText (text ) ;
			 QString reversedText = text;
			 std::reverse(reversedText.begin(), reversedText.end());
			 label _12- > setText(reversedText);

          });

    }
};

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

    DoorCoupletWidget widget;
    widget.show();

    return app.exec();
}

请尝试使用修改后的代码进行编译和运行。如果还有问题，请随时提问。

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