验证码：view

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'index.dart';

class SendcodePage extends GetView<SendcodeController> {
  // 接收注册页面，传进来的手机号控制器，和发送验证码的类型
  final TextEditingController? mobileController;
  final String? type;
  const SendcodePage({super.key,this.mobileController,this.type});

  @override
  Widget build(BuildContext context) {
    print('父组件传进来的值${mobileController!.text},${type}');
    return GetBuilder<SendcodeController>(
      // 把值传递给SendcodeController控制器
      init: SendcodeController(mobileController:mobileController,type:type),
      id: "sendcode",
      builder: (_) {
        return GestureDetector(
          onTap: controller.onSendCode,
          child: controller.isSend ? Text(controller.title,style: TextStyle(fontSize: 14,color: Colors.grey),) : Text(controller.title,style: TextStyle(fontSize: 14,color: Color(0xfff0052d9)),),
        );
      },
    );
  }
}

验证码：controller

import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter_aidishi/models/request/user_send_code.dart';
import 'package:flutter_aidishi/utils/loading.dart';
import 'package:get/get.dart';
import '../../api/user.dart';

class SendcodeController extends GetxController {
  // 注册页手机号控制器，获取到手机号
  final TextEditingController? mobileController;
  // 发送验证码的类型
  final String? type;
  SendcodeController({this.mobileController,this.type});
  String title = '发送验证码';
  bool isSend = false;
  Timer? timer;
  int downTime = 0;

  void onSendCode() async{
    Loading.show();
    if(isSend) return;

    var isOk = await UserApi.sendCode(UserSendCodeModel(
        phone: mobileController!.text,
        type: type
    ));
    if(!isOk) return;
    title = '${60}秒后重新发送';
    isSend = true;
    downTime = 60;
    Loading.success();
    // 启动倒计时
    timer = Timer.periodic(Duration(seconds: 1), (Timer timer) {
      if (downTime > 0) {
        downTime--;
        title = '${downTime}秒后重新发送';
        update(["sendcode"]);
      } else {
        timer.cancel();
        title = '发送验证码';
        isSend = false;
        downTime = 0;
        update(["sendcode"]);
      }
    });
  }

  _initData() {
    update(["sendcode"]);
  }

  @override
  void onInit() {
    super.onInit();
  }

  @override
  void onReady() {
    super.onReady();
    _initData();
  }

  @override
  void onClose() {
    super.onClose();
  }
}

注册页

Container(
  child: TDInput(
    leftLabel: '验证码',
    backgroundColor: Color(0xffF5F5F5),
    hintText: '请输入验证码',
    controller: controller.codeController,
    onChanged:(value){
      controller.checkLoginButtonState();
    },
    needClear:false,
    rightBtn: Container(
      // 在这里把手机号控制器，验证码的类型，传递过去。
      child: SendcodePage(mobileController:controller.mobileController,type:'register'),
    ),
  ),
),