Cocos2d-JS加速度计与加速度事件

标签：cocos2d   游戏   cocos2d-x   c++   

var HelloWorldLayer = cc.Layer.extend({
 
	ctor:function () {
        this._super();
        cc.log("HelloWorld init");
        var size = cc.director.getWinSize();
        
        var bg = new cc.Sprite(res.Background_png);
        bg.x = size.width/2;
        bg.y = size.height/2;
        this.addChild(bg, 0, 0);
    
        var ball = new cc.Sprite(res.Ball_png);
        ball.x = size.width/2;
        ball.y = size.height/2;
        this.addChild(ball, 10, SpriteTags.kBall_Tag);
        
        return true;
    },
    onEnter: function () {
    		this._super();
    		cc.log("HelloWorld onEnter");
    		var ball = this.getChildByTag(SpriteTags.kBall_Tag);


    		cc.inputManager.setAccelerometerEnabled(true);    						①
		
    		cc.eventManager.addListener({										②
    			event: cc.EventListener.ACCELERATION,								③
    			callback: function(acc, event){										④
    				var size = cc.director.getWinSize();								⑤
    				var s = ball.getContentSize();									⑥
    				var p0 = ball.getPosition();


    				var p1x =  p0.x + acc.x * SPEED ;								⑦
    				if ((p1x - s.width/2) <0) {										⑧
    					p1x = s.width/2;											⑨
    				}
    				if ((p1x + s.width / 2) > size.width) {								⑩
    					p1x = size.width - s.width / 2; 									?
    				}


    				var p1y =  p0.y + acc.y * SPEED ; 
    				if ((p1y - s.height/2) < 0) {
    					p1y = s.height/2;
    				}
    				if ((p1y + s.height/2) > size.height) {
    					p1y = size.height - s.height/2;
    				}
    				ball.runAction(cc.place(cc.p( p1x, p1y))); 						?
    			}
    		}, ball);
    },
    onExit: function () {
    		this._super();
    		cc.log("HelloWorld onExit");
    		cc.eventManager.removeListeners(cc.EventListener.ACCELERATION);			?
    }
});

上述onExit()函数是退出层时候回调，我们在代码第?行注销所有加速度事件的监听。

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Cocos2d-JS加速度计与加速度事件

标签：cocos2d   游戏   cocos2d-x   c++   

原文地址：http://blog.csdn.net/tonny_guan/article/details/44851983