flutter 设置 TextField 的值

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

String _newContent = ""; GlobalKey _newContentKey = new GlobalKey();        ......   Container(          padding: EdgeInsets.fromLTRB(0.00, 5.00, 0.00, 0.00),          child: new TextField(            key: _newContentKey,            controller: new TextEditingController(),            style: TextStyle(fontSize: 9.00, color: Colors.black),            autocorrect: false,            maxLines: 2,            decoration: new InputDecoration(                labelText: '内容',                border: new OutlineInputBorder(                    borderRadius: new BorderRadius.circular(3.0))),            onChanged: (val) {              if (val.length > 100) {                _newContent = val.substring(0, 100);                (_newContentKey.currentWidget as TextField)                    .controller                    .text = _newContent;              } else {                _newContent = val;              }            },          )..controller.text = _newContent,        ),

　　主要需要的是 controller