TOOlbutton按纽上放图标问题 [复制链接]

我在两个TOOlbutton按纽上分别放放图标，程序如下：
  zoomInButton = new QToolButton(this);
    zoomInButton->setIconSet(QPixmap("images/zoomin.png"));
    zoomInButton->adjustSize();
    connect(zoomInButton, SIGNAL(clicked()), this, SLOT(zoomIn()));

    zoomOutButton = new QToolButton(this);
    zoomOutButton->setIconSet(QPixmap("images/zoomout.png"));
    zoomOutButton->adjustSize();
    connect(zoomOutButton, SIGNAL(clicked()), this, SLOT(zoomOut()));

    但是程序运行的结果是出现的图标一大一小   

是不是你的图标本来就是一大一小呀