cocos2d js ScrollView的使用方法

游戏中非常多须要用到ScrollView的情况，也就是须要滚动一片区域。

这里有两种实现方法，一种是使用cocos studio的方式，另外一种是手写代码。先看第一种

第一种记得在设置滚动区域时选取裁剪项。

        var size = cc.winSize;

        //读取json文件
        var root = ccs.uiReader.widgetFromJsonFile(res.listJson);
       this.addChild(root);
       //获取在cocos studio里面设定好的scrollView
        var missionlist = ccui.helper.seekWidgetByName(root, "MissionList");
       //设定垂直朝向滚动
        missionlist.setDirection(ccui.ScrollView.DIR_VERTICAL);
        missionlist.setTouchEnabled(true);
        missionlist.setBounceEnabled(true);
        missionlist.setVisible(true);
        //设置大小
        missionlist.setSize(cc.size(960, 400));
        //设置能够滚动区域
        var len = 9;
        missionlist.setInnerContainerSize(cc.size(960, 80* len));
        missionlist.y = size.height/2;
        missionlist.x = size.width/2;
        missionlist.setAnchorPoint(cc.p(0.5,0.5));
       //设置滚动的项目
        for(var i = 0; i < len; i++){
	        var sprite = new cc.Sprite(res.item_png);
	        missionlist.addChild(sprite);
	        sprite.x = missionlist.width/2;
	        sprite.y = missionlist.getInnerContainerSize().height + 40 - (i+1)*80;
	        sprite.setAnchorPoint(cc.p(0.5,0.5));
        }
         missionlist.jumpToTop();

另外一种。手写代码

        var listView = ccui.ScrollView.create();
        listView.setDirection(ccui.ScrollView.DIR_VERTICAL);
        listView.setTouchEnabled(true);
        listView.setBounceEnabled(true);
        listView.setSize(cc.size(960, 400));
        listView.x = size.width/2;
        listView.y = size.height/2;
        listView.setAnchorPoint(cc.p(0.5,0.5));
        this.addChild(listView);
       listView.setInnerContainerSize(cc.size(960, 80*9));
        for(var i =0; i < 9; i++){
         var sprite = new cc.Sprite(res.item_png);
         listView.addChild(sprite);
         sprite.x= listView.width/2;
         sprite.y= listView.getInnerContainerSize().height + 40 - (i+1)*80;
         sprite.setAnchorPoint(cc.p(0.5,0.5));
        }

        listView.jumpToTop();

以下是左右滑动的代码演示样例

var HelloWorldLayer = cc.Layer.extend({
    sprite:null,
    ctor:function () {

        this._super();

        var size = cc.winSize;
        
        var listView = new ccui.ScrollView();
        listView.setDirection(ccui.ScrollView.DIR_HORIZONTAL); 
        listView.setTouchEnabled(true);  
        listView.setBounceEnabled(true); 
        listView.setSize(cc.size(512, 200));  
        listView.x = size.width/2;  
        listView.y = size.height/2;
        listView.setAnchorPoint(cc.p(0.5,0.5));  
        this.addChild(listView);
        listView.setInnerContainerSize(cc.size(128*6, 200));
        for(var i =0; i < 6; i++){  
        <span style="white-space:pre">	</span>var sprite = new cc.Sprite(res.item_png);  
        <span style="white-space:pre">	</span>listView.addChild(sprite);
        <span style="white-space:pre">	</span>
        <span style="white-space:pre">	</span>sprite.x= i*130 + 40;
        <span style="white-space:pre">	</span>sprite.y= listView.getInnerContainerSize().height/2;  
        <span style="white-space:pre">	</span>sprite.setAnchorPoint(cc.p(0.5,0.5));
        }  

        listView.jumpToLeft();  
        cc.log("ben guo...");
        return true;
    }
});

var HelloWorldScene = cc.Scene.extend({
    onEnter:function () {
        this._super();
        var layer = new HelloWorldLayer();
        this.addChild(layer);
    }
});