栅格布局管理器QGridLayout类使得部件在网格中布局，它将所有的空间分隔成一些行和列，行和列的交叉处就形成了单元格，然后将部件放人一个确定的单元格中。 QGridLayout代码控制 ui->setupUi(this); QGridLayout *pGridLayout = new QGridLayout(); //pGridLayout->addWidget(ui->btn_one,0,0,1,1); //pGridLayout->addWidget(ui->btn_two,0,1,1,1); //pGridLayout->addWidget(ui->btn_three,1,0,1,2); 好文章，来自【福优学苑@音视频+流媒体】 // pGridLayout->addWidget(ui->btn_one,0,0,1,2); // pGridLayout->addWidget(ui->btn_two,1,0,1,1); // pGridLayout->addWidget(ui->btn_three,1,1,1,1); pGridLayout->addWidget(ui->btn_one,0,0,2,1); pGridLayout->addWidget(ui->btn_two,0,1,1,1); pGridLayout->addWidget(ui->btn_three,1,1,1,1); this->setLayout(pGridLayout);