QFormLayout 表单布局
最后更新于：2022-04-02 02:12:15
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## 概述
QFormLayout管理输入型控件和关联的标签组成的那些Form表单
QFormLayout::RowWrapPolicy枚举
|内容| 值| 描述 效果|
|---|---|---|
|QFormLayout::DontWrapRows |0| 输入框始终在标签旁边 这里写图片描述|
|QFormLayout::WrapLongRows |1| 标签有足够的空间适应，如果最小大小比可用空间大，输入框会被换到下一行 这里写图片描述|
|QFormLayout::WrapAllRows |2 |输入框始终在标签下边 这里写图片描述|
## 示例
### Simple
```
QFormLayout *pLayout = new QFormLayout();
pLayout->addRow(QStringLiteral("用户名："), pUserLineEdit);
pLayout->addRow(QStringLiteral("密码："), pPasswordLineEdit);
pLayout->addRow(QStringLiteral("验证码："), pVerifyLineEdit);
pLayout->setSpacing(10);
pLayout->setMargin(10);
setLayout(pLayout);
```
与QGridLayout比较
```
QLabel *pUserNameLabel = new QLabel(this);
QLabel *pPasswordLabel = new QLabel(this);
QLabel *pVerifyLabel = new QLabel(this);
pUserNameLabel->setText(QStringLiteral("用户名："));
pPasswordLabel->setText(QStringLiteral("密码："));
pVerifyLabel->setText(QStringLiteral("验证码："));
QGridLayout *pLayout = new QGridLayout();
pLayout->addWidget(pUserNameLabel, 0, 0);
pLayout->addWidget(pUserLineEdit, 0, 1);
pLayout->addWidget(pPasswordLabel, 1, 0);
pLayout->addWidget(pPasswordLineEdit, 1, 1);
pLayout->addWidget(pVerifyLabel, 2, 0);
pLayout->addWidget(pVerifyLineEdit, 2, 1);
pLayout->setSpacing(10);
pLayout->setMargin(10);
setLayout(pLayout);
```
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