If Apple prohibits the use of udid in ios5.0, how can it determine the device?

If there is no better method, follow the official documents...


Cfstringref ref = cfuuidcreatestring (kcfallocatordefault,

Cfuuidcreate (kcfallocatordefault ));

Nsstring * UUID = (nsstring *) ref;

Nslog (@ "UUID: % @", UUID );

// Save the UUID

Nsuserdefaults * defaults = [nsuserdefaults standarduserdefaults];

[Defaults setvalue: UUID forkey: @ "udid"];

[Defaults synchronize];

Cfrelease (REF );


You can only temporarily replace [[uidevice currentdevice] uniqueidentifier];

The value obtained for each operation is different, but the same value may not appear for two devices...

It is estimated that Apple is afraid that the udid will affect user privacy, so this is done...