小编Ume*_*har的帖子

我有一个创建文本字段的函数

  Widget _createNormalTextField(
  String hintTxt,
  TextEditingController controller,
  TextInputType inputType,
  String Function(String) validation,
  Function(String) onTextChanged,
  int length,
  Widget suffixIcon) {
return Container(
  margin: EdgeInsets.symmetric(vertical: 8),
  child: new TextFormField(
      controller: controller,
      maxLength: length,
      keyboardType: inputType,
      validator: validation,
      onChanged: onTextChanged,
      decoration: InputDecoration(
        contentPadding: EdgeInsets.only(bottom: -10.0),
        suffixIcon: suffixIcon,
        hintText: hintTxt,
      )),
);
}

我正在创建一些像这样的文本字段：

Column(
    children: <Widget>[
      Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: <Widget>[
          Expanded(flex: 2, child: Text("Discount")),
          SizedBox(
            width: 4,
          ),
          Expanded(
            flex: 1,
            child: _createNormalTextField(
                "", _discountPercentController, TextInputType.number, null,
                (txt) {
              setState(() {
                calculateAmount(txt); …