关与qt 布局 addWidget 会不会自动为子控件设置父对象问题

一、不会的情况

     QGridLayout layout ;
 
    Form* f1 = new Form();
    Form* f2 = new Form();
    Form* f3 = new Form();
    Form* f4 = new Form();
    Form* f5 = new Form();
 
    layout.addWidget(f1, 0, 0);
    layout.addWidget(f2, 0, 1);
    layout.addWidget(f3, 0, 2);
    layout.addWidget(f4, 1, 0);
    layout.addWidget(f5, 1, 1);
 
    //layout  析构后， form 并不会进入析构

二、可以的情况

    QGridLayout* layout = new QGridLayout;
 
    Form* f1 = new Form();
    Form* f2 = new Form();
    Form* f3 = new Form();
    Form* f4 = new Form();
    Form* f5 = new Form();
 
    layout->addWidget(f1, 0, 0);
    layout->addWidget(f2, 0, 1);
    layout->addWidget(f3, 0, 2);
    layout->addWidget(f4, 1, 0);
    layout->addWidget(f5, 1, 1);
 
 
    ui->widget->setLayout(layout);
 
    //通过为layout设置父对象实现了所以子控件的父对象设置