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# convert(_:to:)

Converts a rectangle from the receiver’s coordinate system to that of another view.

```
func convert(_ rect: CGRect, to view: UIView?) -> CGRect
```

## Parameters

`rect`

A rectangle specified in the local coordinate system (bounds) of the receiver.

`view`

The view that is the target of the conversion operation. If `view` is `nil`, this method instead converts to window base coordinates. Otherwise, both `view` and the receiver must belong to the same [`UIWindow`](/documentation/UIKit/UIWindow) object.

## Return Value

The converted rectangle.

## Discussion

---

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