Qt: accessing controls in other forms

Qt Development , There is a large form embedded with a small form , Now you need to get the text of a control in the small form in the code of the large form .

I studied it , Found the answer ：

Set the form's ui by public.

Large form ：FormCL3P

Little window ：Form3PType1

1. The ui Set to public

class Form3PType1 : public QWidget
{
//...
public: // Set to public
    Ui::Form3PType1 *ui;
};

2. Define global small form objects

//G Is a custom global class 
G::form3PType1 = new Form3PType1();

3. Access the controls of the small form in the form

qDebug() << "ANo: " << G::form3PType1->ui->tbxANo->toPlainText();

Interface ：

Output ：