【Unity】全てのシーンのフォントを一括で置き換える

// Assets/Editor/FontReplacer.cs
using UnityEngine;
using UnityEditor;

public class FontReplacer : EditorWindow {
	[MenuItem("Tools/Replace Font")]
	public static void ReplaceFont() {
		EditorWindow.GetWindow(typeof(FontReplacer)).Show();
	}

// Assets/Editor/FontReplacer.cs
	private Font font;
	void OnGUI() {
		font = EditorGUILayout.ObjectField("Font", font, typeof(Font), true) as Font;
		if (font != null) {
			if (GUILayout.Button("Replace font in all scenes")) {
				string title = "Replacing [" + font.name + "]";
				EachScene(title, (string path) => {
					return ReplaceLabelsFontInScene(font);
				});
			}
		}
	}

// Assets/Editor/FontReplacer.cs
	private static bool ReplaceLabelsFontInScene(Font font) {
		UILabel[] labels = Object.FindObjectsOfType(typeof(UILabel)) as UILabel[];
		if (labels.Length == 0)
			return false;
		foreach (UILabel label in labels)
			label.trueTypeFont = font;
		return true;
	}

delegate bool OnScene(string path);
private static void EachScene(string title, OnScene onScene) {
	string currentScene = EditorApplication.currentScene;
	string[] sceneGuids = AssetDatabase.FindAssets("t:Scene");
	for (int i = 0; i < sceneGuids.Length; ++i) {
		string guid = sceneGuids[i];
		string path = AssetDatabase.GUIDToAssetPath(guid);
		EditorUtility.DisplayProgressBar(title, path, (float)i / (float)sceneGuids.Length);
		EditorApplication.OpenScene(path);
		if (onScene(path))
			EditorApplication.SaveScene();
	}
	EditorUtility.ClearProgressBar();
	if (!string.IsNullOrEmpty(currentScene))
		EditorApplication.OpenScene(currentScene);
}