QFormLayout
n行两列表单，提供了一套insertRow、removeRow、addRow的方法，此类默认第一列为QLabel，支持第一列只提供字符串而不提供QLabel对象
表单换行策略
setRowWrapPolicy(RowWrapPolicy policy)
| Constant | Value | Description |
|---|---|---|
QFormLayout::DontWrapRows |
0 |
一直在一行Fields are always laid out next to their label. This is the default policy for all styles except Qt Extended styles. |
QFormLayout::WrapLongRows |
1 |
自适应，如果空间不够则两行Labels are given enough horizontal space to fit the widest label, and the rest of the space is given to the fields. If the minimum size of a field pair is wider than the available space, the field is wrapped to the next line. This is the default policy for Qt Extended styles. |
QFormLayout::WrapAllRows |
2 |
一直两行Fields are always laid out below their label. |
setWidget(int row, ItemRole role, QWidget *widget)
不使用addrow一类的整行添加，也可以逐个添加，使用此函数需要设置ItemRole
| Constant | Value | Description |
|---|---|---|
QFormLayout::LabelRole |
0 |
标签列A label widget. |
QFormLayout::FieldRole |
1 |
输入框列A field widget. |
QFormLayout::SpanningRole |
2 |
单控件占用整行A widget that spans label and field columns. |
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| 本文链接: Cologic Blog - QLayout窗口布局 - https://www.coologic.cn/2017/12/690/
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