2024年Flutter 项目实战 编辑框(TextField) 自定义 七，2024年最新程序员面试自我介绍

在Flutter中，自定义TextField通常意味着创建一个继承自TextField的新类，并重写其中的某些方法来改变其行为。以下是一个自定义TextField的简单示例，它增加了一个自定义的装饰：

import 'package:flutter/material.dart';
 
class CustomTextField extends TextField {
  CustomTextField({
    Key? key,
    TextEditingController? controller,
    FocusNode? focusNode,
    InputDecoration? decoration = const InputDecoration(),
    TextInputType? keyboardType,
    TextInputAction? textInputAction,
    TextStyle? style,
    StrutStyle? strutStyle,
    TextDirection? textDirection,
    TextAlign textAlign = TextAlign.start,
    bool readOnly = false,
    bool showCursor = true,
    bool autofocus = false,
    bool obscureText = false,
    bool autocorrect = true,
    int maxLines = 1,
    int minLines = 1,
    MaxLengthEnforcement? maxLengthEnforcement,
    int? maxLength,
    ValueChanged<String>? onChanged,
    VoidCallback? onEditingComplete,
    ValueChanged<String>? onSubmitted,
    List<TextInputFormatter>? inputFormatters,
    bool enabled = true,
    double cursorWidth = 2.0,
    Radius? cursorRadius,
    Color? cursorColor,
    Brightness? keyboardAppearance,
    EdgeInsets scrollPadding = const EdgeInsets.all(20.0),
    bool enableInteractiveSelection = true,
    InputCounterWidgetBuilder? buildCounter,
  }) : super(
    key: key,
    controller: controller,
    focusNode: focusNode,
    decoration: decoration!.copyWith(
      border: OutlineInputBorder(
        borderRadius: BorderRadius.circular(10.0),
        borderSide: BorderSide(color: Colors.blue),
      ),
      filled: true,
      fillColor: Colors.blue.shade100,
    ),
    keyboardType: keyboardType,
    textInputAction: textInputAction,
    style: style,
    strutStyle: strutStyle,
    textDirection: textDirection,
    textAlign: textAlign,
    readOnly: readOnly,
    showCursor: showCursor,
    autofocus: autofocus,
    obscureText: obscureText,
    autocorrect: autocorrect,
    maxLines: maxLines,
    minLines: minLines,
    maxLengthEnforcement: maxLengthEnforcement,
    maxLength: maxLength,
    onChanged: onChanged,
    onEditingComplete: onEditingComplete,
    onSubmitted: onSubmitted,
    inputFormatters: inputFormatters,
    enabled: enabled,
    cursorWidth: cursorWidth,
    cursorRadius: cursorRadius,
    cursorColor: cur