如何在Update函数中仅设置一次动画命令？

Question

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Animations : MonoBehaviour
{
    public enum AnimatorStates
    {
        WALK, RUN, IDLE
    }

    private Animator _anim;

    void Awake()
    {
        _anim = GetComponent<Animator>();
    }

    public void PlayState(AnimatorStates state)
    {
        string animName = string.Empty;
        switch (state)
        {
            case AnimatorStates.WALK:
                animName = "Walk";
                break;
            case AnimatorStates.RUN:
                animName = "Run";
                break;
        }
        if (_anim == null)
            _anim = GetComponent<Animator>();

        _anim.Play(animName);
    }

    void Update()
    {
        if (MyCommands.walkbetweenwaypoints == true)
        {
            PlayState(AnimatorStates.RUN);
        }
        else
        {
            PlayState(AnimatorStates.IDLE);
        }
    }
}

代码工作正常，但我认为在更新中多次调用PlayState是正确的。我希望如果它的RUN或IDLE状态在Update函数中只调用一次。

一旦walkbetweenwaypoints为true或false，它将在Update函数中调用状态不间断。

Answer 1

在Update方法中保存最后一个状态，仅在状态实际发生更改时才更新：

AnimatorStates lastState = AnimatorStates.IDLE;
public void PlayState(AnimatorStates state)
{
    if(state != lastState)
    {
        string animName = string.Empty;
        switch (state)
        {
            case AnimatorStates.WALK:
                animName = "Walk";
                break;
            case AnimatorStates.RUN:
                animName = "Run";
                break;
        }
        if (_anim == null)
            _anim = GetComponent<Animator>();

        _anim.Play(animName);

        lastState = state;
    }
}