H5白鹭面试题｜完整解析·高频考点·实战经验汇总

class Player extends egret.Sprite {
    private _speed: number = 200;
    private _direction: string = "right";
    private _animation: egret.MovieClip;
    constructor() {
        super();
        this.init();
    }
    private init() {
        let data = RES.getRes("player_json");
        let texture = RES.getRes("player_png");
        this._animation = new egret.MovieClip(data, texture);
        this._animation.play(-1);
        this.addChild(this._animation);
        this.addEventListener(egret.TouchEvent.TOUCH_BEGIN, this.onTouch, this);
    }
    private onTouch(e: egret.TouchEvent) {
        let dx = e.stageX - this.x;
        if (dx > 0) {
            this._direction = "right";
            this._animation.scaleX = 1;
        } else {
            this._direction = "left";
            this._animation.scaleX = -1;
        }
        this.addEventListener(egret.Event.ENTER_FRAME, this.onEnterFrame, this);
    }
    private onEnterFrame() {
        let dx = this._speed * egret.Capabilities.frameRate / 1000;
        if (this._direction === "right") {
            this.x += dx;
        } else {
            this.x -= dx;
        }
        if (Math.abs(this.x - 200) < 1) {
            this.removeEventListener(egret.Event.ENTER_FRAME, this.onEnterFrame, this);
        }
    }
}

class AABB {
    constructor(public x: number, public y: number, public width: number, public height: number) {}
    public intersects(other: AABB): boolean {
        return this.x < other.x + other.width &&
               this.x + this.width > other.x &&
               this.y < other.y + other.height &&
               this.y + this.height > other.y;
    }
}
// 使用示例
let playerBox = new AABB(player.x, player.y, player.width, player.height);
let enemyBox = new AABB(enemy.x, enemy.y, enemy.width, enemy.height);
if (playerBox.intersects(enemyBox)) {
    console.log("碰撞发生！");
}

class GameModel {
    private static _instance: GameModel;
    public score: number = 0;
    public level: number = 1;
    private constructor() {}
    public static get instance(): GameModel {
        if (!GameModel._instance) {
            GameModel._instance = new GameModel();
        }
        return GameModel._instance;
    }
    public addScore(points: number) {
        this.score += points;
        if (this.score > 1000) {
            this.level++;
            this.score = 0;
            console.log("升级到第" + this.level + "级");
        }
    }
}