我被卡通转换钥匙串查询结果使用Swift。
我的要求似乎在工作：
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，代码不会编译：
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!
我不知道如何转换非托管的< AnyObject>到NSData。
有任何想法吗？
使用withUnsafeMutablePointer函数和UnsafeMutablePointer结构来检索数据，如下所示：
var result: AnyObject?
var status = withUnsafeMutablePointer(&result) { SecItemCopyMatching(queryAttributes,UnsafeMutablePointer($0)) }
if status == errSecSuccess {
if let data = result as NSData? {
if let string = NSString(data: data,encoding: NSUTF8StringEncoding) {
// ...
}
}
}
它发布(Fastest [-O])构建工作正常。
