TextコンポーネントのFontを一括で置き換えるEditor拡張

FontReplacer.cs

using UnityEngine;
using UnityEditor;
using UnityEngine.UI;
using UnityEditor.SceneManagement;

public class FontReplacer
{

    [MenuItem("Tools/FontReplace")]
    public static void Replace ()
    {
        // 置き換えたいフォントの指定
        var replaceFont = (Font)AssetDatabase.LoadAssetAtPath ("Assets/Font/mplus-1p-regular.otf", typeof(Font));
        
        var textComponents = Resources.FindObjectsOfTypeAll(typeof(Text)) as Text[];
        foreach (var component in textComponents)
        {
            // 置き換え
            component.font = replaceFont;
        }
        
        // 非保存のマーキング（Sceneの米印がついた状態）
        EditorSceneManager.MarkAllScenesDirty();
        
        // Sceneの保存
        EditorSceneManager.SaveOpenScenes();
    }
}