状态模式设计动画状态机

状态基类：所有状态继承自它

public abstract class IState
{
    public virtual AnimState selfState { get; }
    public abstract int animHash { get; }
    public virtual void EnterState(Animator animator, PlayerController playerController)
    {

    }
    public virtual void ExitState(Animator animator)
    {

    }
    public virtual void UpdateState(Animator animator,PlayerController playerController, AnimStateMachine animStateMachine)
    {

    }
}

状态机：管理所有状态 的切换更新

public class AnimStateMachine 
{
    public Dictionary<AnimState, IState> stateDic = new Dictionary<AnimState, IState>();
    Animator _animator;
    IState currState;
    public AnimState GetCurrState
    {
        get { return currState.selfState; }
    }
    PlayerController controller;
    public AnimStateMachine(Animator animator,PlayerController player,AnimState initState)
    {
        _animator = animator;
        controller = player;
        stateDic.Add(AnimState.Idle,new IdleState());
        stateDic.Add(AnimState.Jump,new JumpState());
        stateDic.Add(AnimState.CombatMove,new CombatMoveState());
        stateDic.Add(AnimState.Move,new MoveState());
        currState = stateDic[initState];
    }
    public void Update()
    {
        currState.UpdateState(_animator,controller,this);
    }
    public void ChangeState(AnimState state)
    {
        if (!stateDic.TryGetValue(state,out IState st))
        {
            return;
        }

　　　　currState.ExitState(_animator); 
　　　　currState = st; 
　　　　currState.EnterState(_animator,controller); 
　　} 
}

状态例子：

/// <summary>
/// 普通移动
/// </summary>
public class MoveState : IState
{
    public override int animHash => Animator.StringToHash("ToMove");
    public int speedHash => Animator.StringToHash("Speed");
    public override AnimState selfState => AnimState.Move;

    public override void EnterState(Animator animator, PlayerController playerController)
    {
        animator.SetTrigger(animHash);
    }
    public override void ExitState(Animator animator)
    {
        animator.ResetTrigger(animHash);

    }
    public override void UpdateState(Animator animator, PlayerController playerController, AnimStateMachine animStateMachine)
    {
        if (Input.GetKeyDown(KeyCode.Tab))
        {
            playerController.UpdateCombatState();
        }

            playerController.Move();
        
    }
}

/// <summary>
/// IDle
/// </summary>
public class IdleState : IState
{
    public override int animHash => Animator.StringToHash("ToStand");
    public override AnimState selfState => AnimState.Idle;

    public override void EnterState(Animator animator, PlayerController playerController)
    {
        animator.SetTrigger(animHash);
    }
    public override void ExitState(Animator animator)
    {
        animator.ResetTrigger(animHash);
    }
    public override void UpdateState(Animator animator,PlayerController playerController, AnimStateMachine animStateMachine)
    {
        if (Input.GetKeyDown(KeyCode.Tab))
        {
            playerController.UpdateCombatState();
        }
        if (playerController.HasMoveAxis)
        {
            animStateMachine.ChangeState(AnimState.Move);
        }
    }
}