game_cocos_2c/assets/scripts/modules/lobby/ui/LoadingView.ts

import { UICloseReason } from '@scripts/framework/ui/UILayer';
import { UIView } from '@scripts/framework/ui/UIView';
import { _decorator, Component, Node, Tween, tween } from 'cc';
const { ccclass, property } = _decorator;

@ccclass('LoadingView')
export class LoadingView extends UIView {
    @property(Node)
    circleNode: Node = null;

    protected onOpen(_params: unknown): void | Promise<void> {
        Tween.stopAllByTarget(this.circleNode);
        tween(this.circleNode).by(0.5, { angle: 50 }).repeatForever().start();
    }

    protected onClose(_reason: UICloseReason): void | Promise<void> {
        Tween.stopAllByTarget(this.circleNode);
    }
}