Warning: `defaultValue` is invalid for `getFieldDecorator` will set `value`, please use `option.initialValue` instead.

{getFieldDecorator('message', {
    rules: [{ required: true }],
})(
    <TextArea  defaultValue="默认值" />
)}

会报错

Warning: `defaultValue` is invalid for `getFieldDecorator` will set `value`, please use `option.initialValue` instead.

可改为：

{getFieldDecorator('joinin_message', {
    rules: [{ required: true }],
    initialValue: "默认值"
})(
    <TextArea  />
)}

如果默认值是变量data.value，则这样写：

{getFieldDecorator('joinin_message', {
    rules: [{ required: true }],
    initialValue: data.value
})(
    <TextArea rows={4} cols={73} style={{ marginLeft: 70 }} />
)} 

data.value 不要在用 {} 包裹