QTDesigner的QVBoxLayout自动随窗口拉伸

在MainWindow的构造函数中添加如下代码：

//设置Ui

ui.setupUi(this);

//使Ui可自适应父窗口大小

QVBoxLayout* mainLayout = new QVBoxLayout;

mainLayout->addWidget(ui.verticalLayoutWidget);

setLayout(mainLayout);

或

MainWindow::MainWindow(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::MainWindow)

{

ui->setupUi(this);

QVBoxLayout* mainLayout = new QVBoxLayout;

mainLayout->addWidget(ui->verticalLayoutWidget);

ui->centralWidget->setLayout(mainLayout);

}

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