setCodeSigningRequirement(_:)

Declaration

func setCodeSigningRequirement(_ requirement: String)

Parameters

• requirement:

  A string that describes requirements expected of the connection peer. See CodeSigningGuide for more information on the code signing format.

Discussion

Use this method to enforce a code-signing requirement on the peer process of an XPC connection.

The following example shows how a client can ensure that the XPC service on the other end of a connection has a specific entitlement.

Calling this method with a malformed requirement results in a fatal error in Swift, or throws an exception in Objective-C. If new messages don’t match the requirement, the connection becomes invalidated.

Call this method before calling resume(), since it’s an XPC error to call this method more than once.