game_cocos_2c/assets/scripts/modules/launch/states/PreloadLobbyState.ts

import { SceneId } from '../../../framework/scene/SceneNavigator';
import { LaunchContext, LaunchState, LaunchStateId } from './LaunchState';

export class PreloadLobbyState implements LaunchState {
  readonly id = LaunchStateId.PreloadLobby;

  async enter(context: LaunchContext): Promise<LaunchStateId> {
    context.progress({ state: this.id, title: '预加载资源' });
    try {
      await context.kernel.scenes.preload(SceneId.Lobby);
    } catch (error) {
      context.error = error;
      const retry = await context.dialog({
        title: "",
        message: '加载失败，是否重试',
        lblOK: "重试",
      });
      if (retry) {
        return LaunchStateId.CheckVersion;
      }
      throw error;
    }
    context.progress({ state: this.id, progress: 0.9 });
    return LaunchStateId.EnterLobby;
  }
}