2024-12-14 16:53:38 +08:00
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> YXCollectionView 的主要作用是管理数据的渲染和展示。为了提升性能,它通过节点池机制高效地复用单元节点,这使得它具备虚拟列表的特性。但需要特别指出的是,YXCollectionView 的核心业务不仅限于虚拟列表的管理,它更侧重于布局排列的全面控制。
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>
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## 开发环境
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* 2.x
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引擎版本:Cocos Creator **2.4.13**
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编程语言:TypeScript
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* 3.x
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引擎版本:Cocos Creator **3.8.0**
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编程语言:TypeScript
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## 基本特性
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* 节点回收复用(虚拟列表模式)
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* 分帧预加载节点(非虚拟列表模式)
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* 多种单元 cell 节点类型
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* 列表嵌套
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* 分区概念
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2024-12-14 17:51:28 +08:00
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* [布局解耦](./doc/md/layout.md)
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2024-12-14 16:53:38 +08:00
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## 使用
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注册 cell,通过 register() 注册列表内可能用到的节点类型,可多次注册
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```ts
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this.listComp.register(`cell1`, () => instantiate(<your cell prefab>))
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this.listComp.register(`cell2`, () => instantiate(<your cell prefab>))
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this.listComp.register(`cell3`, () => instantiate(<your cell prefab>))
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this.listComp.register(`cell4`, () => instantiate(<your cell prefab>))
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this.listComp.register(`cell5`, () => instantiate(<your cell prefab>))
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```
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---
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绑定数据源,更新节点数据
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```ts
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// this.testData 是模拟数据
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// 确定列表内一共需要显示多少条内容
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this.listComp.numberOfItems = () => this.testData.length;
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this.listComp.cellForItemAt = (indexPath, collectionView) => {
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// 通过下标可以获取到对应的数据
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const data = this.testData[indexPath.item]
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// 通过标识符获取重用池内的节点
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const cell = collectionView.dequeueReusableCell(`your cell identifier`)
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// 更新数据显示
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const comp = cell.getComponent(CommonCell)
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comp.label.string = `${indexPath}`
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comp.randomIcon()
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comp.randomShapeColor()
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comp.randomStar()
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comp.randomLevelSign()
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return cell // 返回这个节点给列表显示
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}
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```
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---
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确定布局方案
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```ts
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let layout = new YXTableLayout()
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layout.spacing = 20
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layout.itemSize = new math.Size(400, 100)
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this.listComp.layout = layout
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```
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---
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以上几个步骤不分先后,确保都配置好就好,数据源绑定/布局对象配置好之后,在需要刷新的时候执行 reloadData
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```ts
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// 更新列表
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this.listComp.reloadData()
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```
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---
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补充: 附张通过编辑器内注册 cell 的截图
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2024-12-14 15:32:38 +08:00
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