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# effectiveRadius(corner:)

Returns the effective radius for the corner you provide, calculated using the view’s current corner configuration.

```
func effectiveRadius(corner: UIRectCorner) -> CGFloat
```

## Parameters

`corner`

The corner whose effective radius you want to calculate.

## Return Value

A `CGFloat` value for the effective radius, expressed in points.

## Overview

When you call this method from [`layoutSubviews()`](/documentation/UIKit/UIView/layoutSubviews()), [`updateProperties()`](/documentation/UIKit/UIView/updateProperties()), or [`updateProperties()`](/documentation/UIKit/UIViewController/updateProperties()), automatic invalidation occurs if the effective radius changes. If you provide more than one corner (for example, [`allCorners`](/documentation/UIKit/UIRectCorner/allCorners)), the returned radius represents the maximum effective radius of those corners.

---

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