更新iOS推送环境

lib/utils/mob_push_util.dart

@@ -102,7 +102,8 @@ class MobPushUtil {
       //设置远程推送环境，向用户授权（仅 iOS)
       MobpushPlugin.setCustomNotification();
       // 开发环境 false, 线上环境 true
-      MobpushPlugin.setAPNsForProduction(true);
+      const bool inProduction = const bool.fromEnvironment("dart.vm.product");
+      MobpushPlugin.setAPNsForProduction(inProduction);
     }
     //上传隐私协议许可
     MobpushPlugin.updatePrivacyPermissionStatus(true);