优化手机端UI

packages/artplayer/src/index.js

@@ -32,6 +32,8 @@ class Artplayer extends Emitter {
         this.option = validator(utils.mergeDeep(Artplayer.option, option), scheme);
         this.isFocus = false;
         this.isDestroy = false;
+        this.ua = utils.userAgent;
+        this.isMobile = utils.isMobile();
         this.whitelist = new Whitelist(this);
         this.template = new Template(this);
         this.events = new Events(this);