dart - Flutter : how to use focusNode property on TextField

我想在f用户点击时控制TextField小部件。如何实现focusNode属性？描述中没有详细的解释。

最佳答案

FocusNode focusNode;

void initState() {
  focusNode = new FocusNode();

  // listen to focus changes
  focusNode.addListener(() => print('focusNode updated: hasFocus: ${focusNode.hasFocus}'));
}

void setFocus() {
  FocusScope.of(context).requestFocus(focusNode);
}

Widget build() {
  return
  ...
  new TextField(focusNode: focusNode, ...);
}