Question

I am making an order booking app. I need to send a unique key from the iPhone/iOS device to the server.

Can I use GUID of iPhone? i.e [UIDevice uniqueIdentifier] Is it legal? Legal means will apple accept that?

What is the best property to use to uniquely identify an iPhone or iOS device?
If not then what would be the other way to uniquely identifying device.

Actually i need booking reference no. generated by app. must be unique.

Answer 1

Create a UUID: A string containing a UUID. The standard format for UUIDs represented in ASCII is a string punctuated by hyphens, for example 68753A44-4D6F-1226-9C60-0050E4C00067.

+ (NSString *)newUUID
{
    CFUUIDRef theUUID = CFUUIDCreate(NULL);
    CFStringRef string = CFUUIDCreateString(NULL, theUUID);
    CFRelease(theUUID);
    return (NSString *)string;
}