---
title: model()
framework: quartzcore
role: symbol
role_heading: Instance Method
path: quartzcore/calayer/model()
---

# model()

Returns the model layer object associated with the receiver, if any.

## Declaration

```swift
func model() -> Self
```

## Return Value

Return Value A layer instance representing the underlying model layer.

## Discussion

Discussion Calling this method on a layer in the presentation tree returns the corresponding layer object in the model tree. This method returns a value only when a transaction involving changes to the presentation layer is in progress. If no transaction is in progress, the results of calling this method are undefined.

## See Also

### Accessing related layer objects

- [presentation()](quartzcore/calayer/presentation().md)