---
title: "protocol_getProperty(_:_:_:_:)"
framework: Objective-C Runtime
role: symbol
role_heading: Function
platforms: [iOS 2.0+, iPadOS 2.0+, Mac Catalyst 13.1+, macOS 10.5+, tvOS 9.0+, visionOS 1.0+, watchOS 1.0+]
path: "objectivec/protocol_getproperty(_:_:_:_:)"
---

# protocol_getProperty(_:_:_:_:)

Returns the specified property of a given protocol.

## Declaration

```swift
func protocol_getProperty(_ proto: Protocol, _ name: UnsafePointer<CChar>, _ isRequiredProperty: Bool, _ isInstanceProperty: Bool) -> objc_property_t?
```

## Parameters

- `proto`: A protocol.
- `name`: The name of a property.
- `isRequiredProperty`: A Boolean value that indicates whether name is a required property.
- `isInstanceProperty`: A Boolean value that indicates whether name is an instance property.

## Return Value

Return Value The property specified by name, isRequiredProperty, and isInstanceProperty for proto, or NULL if none of proto’s properties meets the specification.

## See Also

### Working with Protocols

- [objc_getProtocol(_:)](objectivec/objc_getprotocol(_:).md)
- [objc_copyProtocolList(_:)](objectivec/objc_copyprotocollist(_:).md)
- [objc_allocateProtocol(_:)](objectivec/objc_allocateprotocol(_:).md)
- [objc_registerProtocol(_:)](objectivec/objc_registerprotocol(_:).md)
- [protocol_addMethodDescription(_:_:_:_:_:)](objectivec/protocol_addmethoddescription(_:_:_:_:_:).md)
- [protocol_addProtocol(_:_:)](objectivec/protocol_addprotocol(_:_:).md)
- [protocol_addProperty(_:_:_:_:_:_:)](objectivec/protocol_addproperty(_:_:_:_:_:_:).md)
- [protocol_getName(_:)](objectivec/protocol_getname(_:).md)
- [protocol_isEqual(_:_:)](objectivec/protocol_isequal(_:_:).md)
- [protocol_copyMethodDescriptionList(_:_:_:_:)](objectivec/protocol_copymethoddescriptionlist(_:_:_:_:).md)
- [protocol_getMethodDescription(_:_:_:_:)](objectivec/protocol_getmethoddescription(_:_:_:_:).md)
- [protocol_copyPropertyList(_:_:)](objectivec/protocol_copypropertylist(_:_:).md)
- [protocol_copyProtocolList(_:_:)](objectivec/protocol_copyprotocollist(_:_:).md)
- [protocol_conformsToProtocol(_:_:)](objectivec/protocol_conformstoprotocol(_:_:).md)