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  "documentType" : "symbol",
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  "identifier" : "/documentation/IOUSBHost/IOUSBGetNextInterfaceDescriptor(_:_:)",
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  "title" : "IOUSBGetNextInterfaceDescriptor(_:_:)"
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# IOUSBGetNextInterfaceDescriptor(_:_:)

Obtains the next interface descriptor in a configuration descriptor.

```
func IOUSBGetNextInterfaceDescriptor(_ configurationDescriptor: UnsafePointer<IOUSBConfigurationDescriptor>!, _ currentDescriptor: UnsafePointer<IOUSBDescriptorHeader>!) -> UnsafePointer<IOUSBInterfaceDescriptor>!
```

## Parameters

`configurationDescriptor`

A configuration descriptor that contains the descriptors to iterate through.

`currentDescriptor`

A descriptor pointer within the bounds of `configurationDescriptor`, or `nil`.

## Return Value

The next interface descriptor pointer, or `nil` if no matching descriptor returns.

## Discussion

This method uses [`IOUSBGetNextDescriptorWithType(_:_:_:)`](/documentation/IOUSBHost/IOUSBGetNextDescriptorWithType(_:_:_:)) to find the next interface descriptor.

---

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