QT之Qt布局

    QGridLayout *gridLayout = new QGridLayout;  
    gridLayout->setColumnStretch(0, 1);  
    gridLayout->setColumnStretch(1, 4);  
    gridLayout->setColumnStretch(2, 1);  
    gridLayout->setColumnStretch(3, 1);  
    gridLayout->setColumnStretch(4, 4);  

    gridLayout->setMargin(15);  
    gridLayout->setColumnMinimumWidth(2, 15);  


    QLabel *lbl1 = new QLabel(QWidget::tr("First Name:"));  
    QLineEdit *edit1 = new QLineEdit;  
    QLabel *lbl2 = new QLabel(QWidget::tr("Last Name:"));  
    QLineEdit *edit2 = new QLineEdit;  
    QLabel *lbl3 = new QLabel(QWidget::tr("Sex:"));  
    QLineEdit *edit3 = new QLineEdit;  
    QLabel *lbl4 = new QLabel(QWidget::tr("Birthday:"));  
    QLineEdit *edit4 = new QLineEdit;  
    QLabel *lbl5 = new QLabel(QWidget::tr("Address:"));  
    QTextEdit *textEdt = new QTextEdit;  



    gridLayout->addWidget(lbl1, 0, 0);  
    gridLayout->addWidget(edit1, 0, 1);  
    gridLayout->addWidget(lbl2, 0, 3);  
    gridLayout->addWidget(edit2, 0, 4);  
    gridLayout->addWidget(lbl3, 1, 0);  
    gridLayout->addWidget(edit3, 1, 1);  
    gridLayout->addWidget(lbl4, 1, 3);  
    gridLayout->addWidget(edit4, 1, 4);  
    gridLayout->addWidget(lbl5, 2, 0);  
    gridLayout->addWidget(textEdt, 3, 0, 2, 5);  

以上为网格布局的一种方式，很好用。
m_Layout->addWIdget(m_Widget3, 1, 0, 1,2); // 第三个部件起始于（1，0），并纵越1行，横跨2列这个也很重要；