增加缓存整个动画集的功能

src/assets-manager/AssetsManager.ts

@@ -402,7 +402,7 @@ export default class AssetsManager{
 
 				putFrameAnim(img, data);
 
-				const animations = [];
+				const animations = {};
 				for (let name in data.mc) {
 					const animation = getFrameAnimation(name);
 					if (cache) {
@@ -413,7 +413,11 @@ export default class AssetsManager{
 						}
 						this.cacheRes(animation, name, uuid);
 					}
-					animations.push(animation);
+					animations[name] = animation;
+				}
+
+				if (cache) {
+					this.cacheRes(animations, url, uuid);
 				}
 
 				return animations;