Flutter 控制某个TextField获取焦点以及失去焦点

实现获取焦点首先需要先定义一个FocusNode

FocusNode _focusNode= FocusNode();
//在TextField中绑定
TextField(
  focusNode: _focusNode,
),

获取焦点

 InkWell(
              child: Icon(Icons.sentiment_satisfied_rounded),
              onTap: () {
                FocusScope.of(context).requestFocus(_focusNode);
              },
      ),