Question

labelText属性 https://api.flutter.dev/flutter/material/InputDecoration/labelText.html 当文本字段处于焦点状态并且您具有这样的Inputdecoration时向上移动：

InputDecoration(
  labelText: labelText,
  filled: true,
  enabledBorder: OutlineInputBorder(
    borderSide: const BorderSide(
      color: ImpexColors.grey,
      width: 1.0,
    ),
  ),
  focusedBorder: OutlineInputBorder(
    borderSide: const BorderSide(
      color: ImpexColors.secondaryColor,
      width: 2.0,
    ),
  ),
  labelStyle: TextStyle(
    color: ImpexColors.blue,
  ),
)

然后在上边框的中间对齐。聚焦TextField时，是否可以更改labelText的位置？

Answer 1

有可能，孩子吗？

  FocusNode myFocusNode = FocusNode();
  ...
  TextFormField(
      focusNode: myFocusNode,
      decoration: InputDecoration(
        labelStyle: TextStyle(
          height: myFocusNode.hasFocus ? 0.1 : 1, // 0,1 - label will sit on top of border
        ),
        labelText: labelText,
  ...
      ));

还必须添加：

onTap: () =>  setState(() {FocusScope.of(context).requestFocus(myFocusNode);})

聚焦时对齐TextField的labelText

1 个答案: