QT5學習：窗口布局測試

（1）、QWidget窗體顯示與隱藏：

    if(detailWidget->isHidden())
        detailWidget->show();//QWidget窗體顯示
    else
        detailWidget->hide();//QWidget窗體隱藏

（2）、

1. 直接添加兩個按鈕，則按鈕大小會隨前面控件：

    QGridLayout *LeftLayout =new QGridLayout;
    LeftLayout->addWidget(nameLabel,0,0);
    LeftLayout->addWidget(nameLineEdit,0,1);
    LeftLayout->addWidget(sexLabel);
    LeftLayout->addWidget(sexComboBox);

    QPushButton *OKBtn =new QPushButton(tr("確定"));
    QPushButton *DetailBtn =new QPushButton(tr("詳細"));
//    //QDialogButtonBox *btnBox =new QDialogButtonBox(Qt::Vertical);//對話框按鈕組，按鈕豎直放
//    QDialogButtonBox *btnBox =new QDialogButtonBox(Qt::Horizontal);//對話框按鈕組，按鈕水平放一排
//    btnBox->addButton(OKBtn,QDialogButtonBox::ActionRole);
//    btnBox->addButton(DetailBtn,QDialogButtonBox::ActionRole);
    LeftLayout->addWidget(OKBtn);
    LeftLayout->addWidget(DetailBtn);

    //QHBoxLayout *mainLayout =new QHBoxLayout(baseWidget);
    QVBoxLayout *mainLayout =new QVBoxLayout(baseWidget);
    mainLayout->addLayout(LeftLayout);

2. 以對話框按鈕組方式加入到佈局中，則按鈕會正常顯示：

<span style="color:#c0c0c0;">    </span><span style="color:#800080;">QGridLayout</span><span style="color:#c0c0c0;"> </span><span style="color:#000000;">*</span><span style="color:#000000;">LeftLayout</span><span style="color:#c0c0c0;"> </span><span style="color:#000000;">=</span><span style="color:#808000;">new</span><span style="color:#c0c0c0;"> </span><span style="color:#800080;">QGridLayout</span><span style="color:#000000;">;</span><pre style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;"><span style="color:#c0c0c0;">    </span><span style="color:#000000;">LeftLayout</span><span style="color:#000000;">-></span><span style="color:#000000;">addWidget</span><span style="color:#000000;">(</span><span style="color:#000000;">nameLabel</span><span style="color:#000000;">,</span><span style="color:#000080;">0</span><span style="color:#000000;">,</span><span style="color:#000080;">0</span><span style="color:#000000;">);</span>

    LeftLayout->addWidget(nameLineEdit,0,1);

    LeftLayout->addWidget(sexLabel);

    LeftLayout->addWidget(sexComboBox);

    QPushButton *OKBtn =new QPushButton(tr("確定"));

    QPushButton *DetailBtn =new QPushButton(tr("詳細"));

    //QDialogButtonBox *btnBox =new QDialogButtonBox(Qt::Vertical);//對話框按鈕組，按鈕豎直放

    QDialogButtonBox *btnBox =new QDialogButtonBox(Qt::Horizontal);//對話框按鈕組，按鈕水平放一排

    btnBox->addButton(OKBtn,QDialogButtonBox::ActionRole);

    btnBox->addButton(DetailBtn,QDialogButtonBox::ActionRole);

    //LeftLayout->addWidget(OKBtn);

    //LeftLayout->addWidget(DetailBtn);

    //QHBoxLayout *mainLayout =new QHBoxLayout(baseWidget);

    QVBoxLayout *mainLayout =new QVBoxLayout(baseWidget);

    mainLayout->addLayout(LeftLayout);

    mainLayout->addWidget(btnBox);//以對話框按鈕組方式加入到佈局中