获取设备uuid
NSString *vendor = [[UIDevice currentDevice].identifierForVendor UUIDString];
当通常我们如果app重装之后uuid会改变,所以我们需要把它保存在钥匙串内
NSString * deviceVendor = [[GSKeychain systemKeychain]secretForKey:@"XXX"]; //xxx表示是工程名称 从钥匙串中读取uuid
if(!deviceVendor)
{
[[GSKeychain systemKeychain]setSecret:vendor forKey:@"XXX"];
deviceVendor = [[GSKeychain systemKeychain]secretForKey:@"XXX"];
NSLog(@"shareVC保存vendor:%@",deviceVendor);
}
else
{
NSLog(@"shareVC获取vendor:%@",deviceVendor);
}