Qt: "Expanding"在布局中不起作用

Question

我的目的是创建一个带有 QVBoxLayout 的可滚动控件，上面有各种控件(比如按钮)。该控件放在 *.ui 窗体上。在该控件的构造函数中，我编写了以下代码:

    MyScrollArea::MyScrollArea(QWidget *parent) :
        QScrollArea(parent)
    {
        // create the scrollable container

        this->container = new QWidget();  // container widget member
        this->container->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        this->container->setContentsMargins(QMargins(0,0,0,0));

        this->content = new QVBoxLayout(); // layout member
        this->content->setMargin(0);
        this->content->setSpacing(0);

        for (int i=0; i<100; i++)
        {
            QPushButton * widget = new QPushButton();
            widget->setText("button");
            widget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
            this->content->addWidget(widget);
        }

        this->container->setLayout(this->content);
        this->content->layout();

        this->setWidget(this->container);
   }

我的问题:按钮具有固定大小并且不会水平展开。他们有一个固定的大小。我希望它们水平扩展以填充它们所在的行。如何让它们在父容器中水平扩展？

Answer 1

尝试调用 this->setWidgetResizable(true);