刚才在CH5的群里问了问  有没有大侠写过 下拉表单控件啊！  没人鸟窝 ，DZ老师表示非常伤心啊  ，于是乎  自己写一个把 共享给大家。

效果图上一个  仅仅实现了一个最最主要的控件  非常easy  别吐槽啊，以后有空我会完好一下的，假设有朋友自愿帮忙完好一下就更好了。

有不论什么问题请加DZ老师的QQ 460418221

引擎版本号 ： 2.2.2

原理：有空再写吧   

源代码：

/**
 * Created with JetBrains WebStorm.
 * User: Dz_Yang
 * Date: 14-4-29
 * Time: 上午13:19
 * To change this template use File | Settings | File Templates.
 */


var Pull_down_menu = cc.Layer.extend({
	WIDTH:0,
	HEIGHT:0,
	COLOR:null,
	STR_ARRAY:null,

	SElECTS:null,
	SELECTING_ID:null,

	STATE:0,

	init:function(){
		this._super();
		var winsize = cc.Director.getInstance().getWinSize();
		 this.SElECTS = new Array();

		for(var i=0;i<this.STR_ARRAY.length;i++){
			this.SElECTS[i] = cc.LayerColor.create(this.COLOR, this.WIDTH, this.HEIGHT);
			var txt = cc.LabelTTF.create(this.STR_ARRAY[i],"Arial",this.HEIGHT * 2/3);
			txt.setPosition(cc.p(this.WIDTH/2,this.HEIGHT/2));
			this.SElECTS[i].addChild(txt);
			this.SElECTS[i].setAnchorPoint(cc.p(0,1));
			this.SElECTS[i].setPosition(cc.p(0,0-(i+1)*this.HEIGHT));
			this.addChild(this.SElECTS[i]);
		}



		this.choose(0);


		this.setTouchEnabled(true);
		return true;
	},

	onTouchesBegan:function (touches, event){
		if(touches.length == 1){
			var click_id = null;

			for(var i=0;i<this.SElECTS.length;i++){
				if(cc.rectContainsPoint(this.SElECTS[i].getBoundingBox(),cc.p( touches[0].getLocation().x -this.getPositionX() ,  touches[0].getLocation().y -this.getPositionY()) )){
					click_id = i;

					break;
				} else{

				}
			}

			if(click_id != null){
				if(this.STATE == 0){
					if(click_id == this.SELECTING_ID){
						this.open();
					}
				}else if(this.STATE == 1){
					 this.choose(click_id);
				}
			}


		}
	},
	onTouchesMoved:function (touches, event){},
	onTouchesEnded:function (touches, event){},

	draw:function(){
		cc.drawingUtil.setDrawColor4B(255, 255, 255, 255);
		cc.drawingUtil.setLineWidth(3);
		cc.drawingUtil.drawLine(cc.p(0,0),cc.p(this.WIDTH,0));
		cc.drawingUtil.drawLine(cc.p(0,0),cc.p(0,this.HEIGHT));
		cc.drawingUtil.drawLine(cc.p(0,this.HEIGHT),cc.p(this.WIDTH,this.HEIGHT));
		cc.drawingUtil.drawLine(cc.p(this.WIDTH,this.HEIGHT),cc.p(this.WIDTH,0));
		

	},

	open:function(){

		this.STATE =1;
	 	for(var i=0;i<this.SElECTS.length;i++){
		    this.SElECTS[i].setPosition(cc.p(0,0-(i+1)*this.HEIGHT));
		    this.SElECTS[i].setVisible(true);
	    }
	},
	close:function(){
		this.STATE =0;
		for(var i=0;i<this.SElECTS.length;i++){
			this.SElECTS[i].setVisible(false);
		}
	},

	choose:function(id){
		this.SELECTING_ID = id;
		this.close();
		this.SElECTS[id].setVisible(true);
		this.SElECTS[id].setPosition(cc.p(0,0));
	},

	getSelectedID:function(){
		return this.SELECTING_ID;
	}

});

Pull_down_menu.create = function(color, width, height, str_array){
	var re = new Pull_down_menu();
	re.WIDTH = width;
	re.HEIGHT = height;
	re.COLOR = color;
	re.STR_ARRAY = str_array;
	re.init();
	return re;

};

用法：

var pdm = Pull_down_menu.create(cc.c4(100,100,100,255),70,20,["丁丁","拉拉","迪西","小波"]);//第一个选项是底色，第二个是宽 第三个高 最后是一个字符串数组
		pdm.setPosition(cc.p(170,winsize.height-150));
		this.addChild(pdm);//是用pdm.getSelectedID() 能够获取选择的选项卡的下标 

欢迎转载，请标明原帖地址：http://blog.csdn.net/ycd_harry/article/details/24709603