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纵向滚动列表无限刷新，横向的稍微修改即可。原理相同。
cc.Class({extends: cc.Component,properties: {itemPref:{type: cc.Prefab,default: null,},mask:{type: cc.Node,default: null,},},// onLoad () {},//只支持纵向。
//只支持纵向。
//只支持纵向。start () {this.itemH = 100; //包括间隙this.itemTotalNum = 8;this.visibleSize = this.mask.getContentSize();this.realItemNum = Math.floor(this.visibleSize.height / this.itemH) + 2;this.itemArr = [];//测试数据this.data = []; for(var i=0; i<17; i++){this.data.push("" + i) ;}this.initItem();},initItem(){var eventHandler = new cc.Component.EventHandler();eventHandler.target = this.node;eventHandler.component = "ScrollHelper";eventHandler.handler = "onScroll";this.scroll_com = this.getComponent(cc.ScrollView); this.scroll_com.scrollEvents.push((eventHandler)); var totalH = this.itemTotalNum*this.itemH;this.mask.getContentSize()this.scroll_com.content.setContentSize(this.visibleSize.width, totalH);this.initObj(); },initObj(){for(var i=0; i < this.realItemNum; i++){var item = cc.instantiate(this.itemPref);this.scroll_com.content.addChild(item);item.y = -this.itemH/2 - this.itemH*i;this.itemArr.push(item);this.refreshData(i, item)}},onScroll(){this.refresh();},refresh(){this.currOffset = this.scroll_com.getScrollOffset();var start_index = Math.floor(this.currOffset.y / this.itemH); var isOutMax = this.visibleSize.height + this.currOffset.y > (this.itemTotalNum-1)*this.itemHif (start_index<0 || isOutMax){return;}for(var i=0; i < this.realItemNum; i++){var item = this.itemArr[i];var new_y = -this.itemH/2 - this.itemH*(i + start_index);item.y = new_y; this.refreshData(i + start_index, item) }},//测试数据refreshData(dataIndex, item){var lbl = item.getChildByName("lbl").getComponent(cc.Label);lbl.string = "aa"+dataIndex;}// update (dt) {},
});
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