GroupTable's column has a formatter,but fieldGroup's field how

微信图片_20180122091502

微信图片_20180122092503微信图片_20180122092549

if I add a formatter in field
it‘s show ok but don’t edit

Right. As explained in the documentation:

Formatter should be used with read-only components, such as Label, Table column and similar. Editable components values, for example, TextField, should be formatted using the Datatype mechanism.