iPhoneUUID获取iPhone的唯一标识符

NSString * strUUID = (NSString *)[SPIMyUUID load:@"KEY_USERNAME_PASSWORD"];
 
//首次执行该方法时，uuid为空
if ([strUUID isEqualToString:@""] || !strUUID)
{
    //生成一个uuid的方法
    CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
 
    strUUID = (NSString *)CFBridgingRelease(CFUUIDCreateString (kCFAllocatorDefault,uuidRef));
 
}
 
NSLog(@"%@",strUUID);