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# XPackageChunkAvailabilityCallback

> XPackageChunkAvailabilityCallback

# XPackageChunkAvailabilityCallback

由 [XPackageEnumerateChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/functions/xpackageenumeratechunkavailability.md) 使用的用户定义的回调。

## 语法

```cpp theme={null}
bool XPackageChunkAvailabilityCallback(  
         void* context,  
         const XPackageChunkSelector* selector,  
         XPackageChunkAvailability availability  
)  
```

### 参数

*context*   \_In\_\
类型：void\*

传递给 [XPackageEnumerateChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/functions/xpackageenumeratechunkavailability.md) 的上下文。

*selector*   \_In\_\
类型：[XPackageChunkSelector\*](https://docs.xbox.com/zh-CN/reference/system/xpackage/structs/xpackagechunkselector.md)

传递给 [XPackageEnumeratePackages](https://docs.xbox.com/zh-CN/reference/system/xpackage/functions/xpackageenumeratepackages.md) 的选择器列表。

*availability*   \_In\_\
类型：[XPackageChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/enums/xpackagechunkavailability.md)

匹配区块的可用性。

### 返回值

类型：bool

若要继续枚举，返回 true。若要停止枚举，返回 false。

## 备注

**XPackageChunkAvailabilityCallback** 是传递给 [XPackageEnumerateChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/functions/xpackageenumeratechunkavailability.md) 的函数回调。它会对枚举的每个元素调用。若要继续枚举，此回调返回 true；若要停止枚举，返回 false。

## 要求

**头文件：** XPackage.h

**库：** xgameruntime.lib

**支持的平台：** Windows、XBOX One 系列主机和 XBOX Series 主机

## 另请参阅

[XPackage](https://docs.xbox.com/zh-CN/reference/system/xpackage/xpackage_members.md)\
[流式安装和 Intelligent Delivery](https://docs.xbox.com/zh-CN/build/core-features/common/packaging/overviews/streaming_install-intelligent_delivery.md)
[XPackageEnumerateChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/functions/xpackageenumeratechunkavailability.md)


## Related topics

- [XPackageEnumerateChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/functions/xpackageenumeratechunkavailability.md)
- [XPackage（API 内容）](https://docs.xbox.com/zh-CN/reference/system/xpackage/xpackage_members.md)
- [XPackageChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/enums/xpackagechunkavailability.md)
- [XPackageFindChunkAvailability](https://docs.xbox.com/zh-CN/reference/system/xpackage/functions/xpackagefindchunkavailability.md)
- [Intelligent Delivery：自定义标签修饰符](https://docs.xbox.com/zh-CN/build/core-features/common/packaging/intelligentdelivery-custom.md)