How to call SecItemCopyMatching in Xcode 7 beta 4?

Question

In previous versions of Xcode 6 and 7 with Swift, this syntax would work:

var secureItemValue: Unmanaged<AnyObject>? let statusCode: OSStatus = SecItemCopyMatching(keychainItemQuery, &secureItemValue) if statusCode == errSecSuccess { let opaquePointer = secureItemValue?.toOpaque() let secureItemValueData = Unmanaged<NSData>.fromOpaque(opaquePointer!).takeUnretainedValue() // Use secureItemValueData... } 

However, the SecItemCopyMatching declaration has changed in Xcode 7 beta 4:

OLD: func SecItemCopyMatching(_ query: CFDictionary, _ result: UnsafeMutablePointer<AnyObject?>) -> OSStatus

NEW: func SecItemCopyMatching(_ query: CFDictionary!, _ result: UnsafeMutablePointer<Unmanaged<AnyObject>?>) -> OSStatus

... and now the type safeItemValue does not match.

The mechanism was confusing before extracting the result, and I hope that with a new declaration it will be somehow easier, but I do not know how to declare the correct type for the secureItemValue variable and extract the result.

Answer 1

It works on Xcode 7 beta 4

 var dataTypeRef: AnyObject? let status: OSStatus = withUnsafeMutablePointer(&dataTypeRef) { SecItemCopyMatching(keychainQuery as CFDictionaryRef, UnsafeMutablePointer($0)) } if status == noErr { return dataTypeRef as? NSData } else { return nil } 

Answer 2

According to this answer, you can simply remove Unmanaged<> around AnyObject:

 var secureItemValue: AnyObject? let statusCode: OSStatus = SecItemCopyMatching(keychainItemQuery, &secureItemValue)