FlutterのTextFieldはデフォルトでは改行ができなくなっています。
![mojikyo45_640-2.gif](https://qiita-user-contents.imgix.net/https%3A%2F%2Fqiita-image-store.s3.ap-northeast-1.amazonaws.com%2F0%2F139360%2Feca682eb-b9e1-5bd1-db64-ab43bd95d3de.gif?ixlib=rb-4.0.0&auto=format&gif-q=60&q=75&s=68a9bcec69521afd316f05aa65eaf470)
TextField(
decoration: InputDecoration(
hintText: "Comment ✍️",
focusedBorder: _inputBorder,
enabledBorder: _inputBorder,
),
),
複数行入力できるようにする
下記の二つを追加します。
keyboardType: TextInputType.multiline,
maxLines: null,
![mojikyo45_640-2.gif](https://qiita-user-contents.imgix.net/https%3A%2F%2Fqiita-image-store.s3.ap-northeast-1.amazonaws.com%2F0%2F139360%2F72a39186-8bfa-36cb-f509-59a9b2149ad8.gif?ixlib=rb-4.0.0&auto=format&gif-q=60&q=75&s=da0c7cf974d8c68fdfd19a6ad6d0d882)
TextField(
keyboardType: TextInputType.multiline,
maxLines: null,
decoration: InputDecoration(
hintText: "Comment ✍️",
focusedBorder: _inputBorder,
enabledBorder: _inputBorder,
),
),
以上です。