A dictionary containing all of the HTTP header fields for a request.
- iOS 8.0+
- macOS 10.10+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
Certain header fields are reserved (see Reserved HTTP Headers). Do not use this property to set such headers.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.Learn more about using Apple's beta software