How to read a variable in setText()?

Question

I need the text of a lineEdit is equal to a variable string.

I’m using this code:

void MainWindow::on_pushButton_clicked(){

    string texto;
    texto= "mensagem";
    ui->lineEdit->setText(texto);
}

Answer 1

Do so:

void MainWindow::on_pushButton_clicked(){
    Qstring texto;
    texto = "mensagem";
    ui->lineEdit->setText(texto);
}

Or better yet:

void MainWindow::on_pushButton_clicked(){
    ui->lineEdit->setText(QStringLiteral("mensagem"));
}

I put in the Github for future reference.

The QStringLiteral is a macro present in Qt 5 that creates a literal like QString without having to convert at runtime.

The setText of LineEdit expecting a QString and not a string standard of C++, so it didn’t work.