iOS7 - 设备唯一标识符[重复]

iOS7 - 设备唯一标识符

swift
import AdSupport
func getDeviceIdentifier() -> String? {
    guard ASIdentifierManager.shared().isAdvertisingTrackingEnabled else {
        return nil
    }
    
    let idfa = ASIdentifierManager.shared().advertisingIdentifier.uuidString
    return idfa
}

swift
import Security
func getDeviceIdentifier() -> String? {
    let keychainQuery: [String: Any] = [
        kSecClass as String: kSecClassGenericPassword,
        kSecAttrAccount as String: "com.example.deviceIdentifier",
        kSecAttrService as String: "com.example.service"
    ]
    
    var result: AnyObject?
    let status = SecItemCopyMatching(keychainQuery as CFDictionary, &result)
    
    if status == errSecSuccess, let data = result as? Data {
        return String(data: data, encoding: .utf8)
    }
    
    let newIdentifier = UUID().uuidString
    let newData = newIdentifier.data(using: .utf8)!
    
    keychainQuery[kSecValueData as String] = newData
    let addStatus = SecItemAdd(keychainQuery as CFDictionary, nil)
    
    if addStatus == errSecSuccess {
        return newIdentifier
    }
    
    return nil
}