SecureUDIDUDID 解決方案

SecureUDID 是一個開源的基于沙箱機制的 UDID 解決方案，旨在解決蘋果因為廢棄了 UDID 后導致的隱私問題。

示例代碼：

#import "SecureUDID.h"

NSString *domain     = @"com.example.myapp";
NSString *key        = @"difficult-to-guess-key";
NSString *identifier = [SecureUDID UDIDForDomain:domain usingKey:key];
// The returned identifier is a 36 character (128 byte + 4 dashes) string that is unique for that domain, key, and device tuple.