如何在Update函數中只設置一次動畫命令？

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); 
     } 
    } 
} 

該代碼工作正常，但我不認爲在更新中多次調用PlayState是正確的。我希望如果它是RUN或IDLE狀態只在Update函數中調用一次。

一旦walkbetweenpointspoints true或false，它將在Update函數中調用狀態不間斷。

Answer 1

保存在更新方法，只有更新的最後狀態，如果狀態實際上已經改變了：

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; 
    } 
}