---
title: allowsGroupOpacity
framework: quartzcore
role: symbol
role_heading: Instance Property
path: quartzcore/calayer/allowsgroupopacity
---

# allowsGroupOpacity

A Boolean indicating whether the layer is allowed to composite itself as a group separate from its parent.

## Declaration

```swift
var allowsGroupOpacity: Bool { get set }
```

## Discussion

Discussion When the value is true and the layer’s opacity property value is less than 1.0, the layer is allowed to composite itself as a group separate from its parent. This gives correct results when the layer contains multiple opaque components, but may reduce performance. The default value is read from the boolean UIViewGroupOpacity property in the main bundle’s Info.plist file. If no value is found, the default value is true for apps linked against the iOS 7 SDK or later and false for apps linked against an earlier SDK.

## See Also

### Modifying the layer’s appearance

- [contentsGravity](quartzcore/calayer/contentsgravity.md)
- [Contents Gravity Values](quartzcore/contents-gravity-values.md)
- [opacity](quartzcore/calayer/opacity.md)
- [isHidden](quartzcore/calayer/ishidden.md)
- [masksToBounds](quartzcore/calayer/maskstobounds.md)
- [mask](quartzcore/calayer/mask.md)
- [isDoubleSided](quartzcore/calayer/isdoublesided.md)
- [cornerRadius](quartzcore/calayer/cornerradius.md)
- [maskedCorners](quartzcore/calayer/maskedcorners.md)
- [CACornerMask](quartzcore/cacornermask.md)
- [borderWidth](quartzcore/calayer/borderwidth.md)
- [borderColor](quartzcore/calayer/bordercolor.md)
- [backgroundColor](quartzcore/calayer/backgroundcolor.md)
- [shadowOpacity](quartzcore/calayer/shadowopacity.md)
- [shadowRadius](quartzcore/calayer/shadowradius.md)