Animatorの再生確認用ボタンを追加する拡張

AnimatorCustomEditor.cs

using UnityEditor;
using UnityEditor.Animations;
using UnityEngine;

[CustomEditor(typeof(Animator))]
public class AnimatorCustomEditor : Editor {
    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI();

        if (!Application.isPlaying)
        {
            return;
        }
        var anim       = target as Animator;
        var controller = anim.runtimeAnimatorController as AnimatorController;
        // 複数レイヤーは普段使わないから、、
        var animatorStates = controller.layers[0].stateMachine.states;
        foreach (var animatorState in animatorStates)
        {
            var state = animatorState.state;
            if (GUILayout.Button("Play:" + state.name))
            {
                anim.Play(state.name);
            }
        }
    }
}