cocosCreator跳跃实现

//人物跳跃的实现
cc.Class({
    extends: cc.Component,

    properties: {
        jumpDuration:0,
        jumpHeight:0,
       
    },
     onLoad () {
      var isJump  =  false;
    //注册按键时间
       cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);
       cc.systemEvent.on(cc.SystemEvent.EventType.KEY_UP, this.onKeyUp, this);
    //moveBy组合动画实现跳动
       var jumUp = cc.moveBy(this.jumpDuration,cc.p(0,this.jumpHeight));
       var jumDown = cc.moveBy(this.jumpDuration,cc.p(0,-this.jumpHeight));
      // this.jumpB = cc.jumpBy(this.jumpDuration,cc.p(0,this.jumpHeight),100,1);
      //callFunc返回一个Action
      var setJump=cc.callFunc(function(){this.isJump=false},this,this);

       this.act = cc.sequence(jumUp,jumDown,setJump);
     },
     //按键事件回调函数
    onKeyDown(event){
        let pos = this.node.y;
        switch(event.keyCode) {
            case cc.macro.KEY.j:      
         // this.node.runAction(this.act);
         if (!this.isJump) {
            this.isJump = true;
            this.node.runAction(this.act);
        };
                console.log('posY = ' + this.node.y);
                break;
        }
   }
});