想必大家都玩过街机游戏，例如红白机的街霸，拳皇，里面角色的技能是通过组合按键触发的，废话不多说，上测试图。 rpg.gif

代码

const {ccclass, property} = cc._decorator;

@ccclass
export default class player extends cc.Component {

    //自定义方向键和攻击键
    public KEY_UP:number = 0;
    public KEY_DOWN:number = 1;
    public KEY_LEFT:number = 2;
    public KEY_RIGHT:number = 3;
    public KEY_ATTACK:number = 4;

    //技能列表中技能的数量
    public SKILLLIST_SIZE:number = 1;
    //每组组合技能的按键数量
    public SKILL_KEYCOUNT = 3;
    //技能列表->二维数组
    private SkillList:Array<any> = [[this.KEY_DOWN,this.KEY_UP,this.KEY_ATTACK]];
    //记录当前按下的按键的值
    private currentKeyCode:number = 0;
    //玩家输入的按键组合
    private inputKeys:Array<any> = [];
    //是否开始计时
    private startFrame:boolean = false;
    //限制输入组合按键的时间(计时器)
    private timer:number = 5;
    //记录开启监听到现在的时间 
    private time:number = 0;
    //是否触发技能成功
    private isSuccess:boolean = false;


    onLoad () {
        cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN,this.OnKeyDown,this);
    }

    start () {

    }

    update (dt) {
        
        if (this.startFrame) {
            //计时器++
            this.time += dt;
            if (this.time >= this.timer) {
            
                //计时器超时
                if (!this.isSuccess) {
                    this.Reset();
                }
            }
        }
    }

    //按下按键
    OnKeyDown(event){
        console.log("按下的按键的keycode",event.keyCode);

        switch (event.keyCode) {
            case cc.macro.KEY.w:
                this.currentKeyCode = this.KEY_UP;
                break;
            case cc.macro.KEY.s:
                this.currentKeyCode = this.KEY_DOWN;
                break;
            case cc.macro.KEY.a:
                this.currentKeyCode = this.KEY_LEFT;
                break;
            case cc.macro.KEY.d:
                this.currentKeyCode = this.KEY_RIGHT;
                break;
            case cc.macro.KEY.j:
                this.currentKeyCode = this.KEY_ATTACK;
                break;
        }

        if (this.isSuccess) {
            console.log("Reset");
            this.isSuccess = false;
            this.Reset();
        }


        if (!this.startFrame) {
            //启动计时器
            this.startFrame = true;
        }

        //将按键值添加到输入按键列表
        this.inputKeys.push(this.currentKeyCode);
        

        //遍历
        let size = this.inputKeys.length;
        if (size<this.SKILL_KEYCOUNT) {   //按键数不够
            
            
        }else{  //如果玩家按键数不小于设定键，取后5位
            console.log("未移除前的元素",this.inputKeys);
            for (let k = 0; k < size - this.SKILL_KEYCOUNT; k++) {
                this.inputKeys.splice(0,1);
            }
            console.log("移除后的元素",this.inputKeys);
            for (let i = 0; i < this.SKILLLIST_SIZE; i++) {
                let successCount = 0;
                for (let j = 0; j < this.SKILL_KEYCOUNT; j++) {
                    let temp = this.inputKeys[j];
                    if (temp == this.SkillList[i][j]) {
                        successCount ++;
                    }

                    if (successCount == this.SKILL_KEYCOUNT) {
                        console.log("isSuccess");
                        this.isSuccess = true;
                        //播放组合技能动画

                        break;
                    }
                }
            }
        }
        
    }

    //重置
    Reset(){
        this.time = 0;
        this.startFrame = false;
        this.inputKeys = [];
    }
}