// ==============================
// Unity 新输入系统 Input System 完整笔记 + 代码
// 结构：ActionMaps → Actions → ActionProperties
// 包含：Button事件绑定 / Value值获取
// ==============================

/*
一、核心概念

1. ActionMaps：行为映射图集（分组：Player/UI等）
2. Actions：行为分类（Jump/Move/Fire等）
3. ActionProperties：按键类型（Button/Value）

二、使用步骤

1. 右键 → Input Actions → 创建 PlayerInputActions

2. 配置：

   • ActionMap: Player
   • Jump → Button → 绑定 Space
   • Move → Value → Vector2 → 绑定 WASD/摇杆
3. 勾选 Generate C# Class → Apply 自动生成脚本
   */

using UnityEngine;
using UnityEngine.InputSystem;

public class PlayerInputController : MonoBehaviour
{

// 自动生成的输入系统类
private PlayerInputActions _inputActions;

private void Awake()
{
    // 生成新输入系统类实例
    _inputActions = new PlayerInputActions();
}

private void OnEnable()
{
    // 启用 ActionMap
    _inputActions.Player.Enable();

    // ==============================
    // Button 类型：事件绑定方式
    // ==============================
    _inputActions.Player.Jump.started += OnJumpStarted;
    _inputActions.Player.Jump.performed += OnJumpPerformed;
    _inputActions.Player.Jump.canceled += OnJumpCanceled;
}

private void OnDisable()
{
    // 注销事件
    _inputActions.Player.Jump.started -= OnJumpStarted;
    _inputActions.Player.Jump.performed -= OnJumpPerformed;
    _inputActions.Player.Jump.canceled -= OnJumpCanceled;

    // 禁用 ActionMap
    _inputActions.Player.Disable();
}

private void Update()
{
    // ==============================
    // Value 类型：值获取方式
    // ==============================
    Vector2 moveInput = _inputActions.Player.Move.ReadValue<Vector2>();
}

// Button 回调
private void OnJumpStarted(InputAction.CallbackContext ctx) => Debug.Log("跳跃按住中");
private void OnJumpPerformed(InputAction.CallbackContext ctx) => Debug.Log("跳跃按下");
private void OnJumpCanceled(InputAction.CallbackContext ctx) => Debug.Log("跳跃松开");

}

// ==============================
// 核心语法总结
// 1. 生成输入类：new PlayerInputActions()
// 2. Button绑定：动作.started/performed/canceled += 方法
// 3. Value获取：ReadValue()
// ==============================