我在使用Swift转换钥匙串查询结果时遇到困难。
我的请求似乎是有效的:
let queryAttributes = NSDictionary(objects: [kSecClassGenericPassword, "MyService", "MyAccount", true],
forKeys: [kSecClass, kSecAttrService, kSecAttrAccount, kSecReturnData])
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), {
var dataTypeRef : Unmanaged<AnyObject>?
let status = SecItemCopyMatching(queryAttributes, &dataTypeRef);
let retrievedData : NSData = dataTypeRef!.takeRetainedValue() as NSData
*** ^^^^can't compile this line^^^^
})
我的问题是,代码无法编译:
Bitcast requires both operands to be pointer or neither
%114 = bitcast %objc_object* %113 to %PSs9AnyObject_, !dbg !487
Bitcast requires both operands to be pointer or neither
%115 = bitcast %PSs9AnyObject_ %114 to i8*, !dbg !487
LLVM ERROR: Broken function found, compilation aborted!
我不知道如何将
Unmanaged<AnyObject>
转换为NSData
。有任何想法吗?