SSKeychain not retain data

问题

I am using SSKeychain for storing UUID of device. However, sometimes SSKeychain not retains UUID, so my app has to recreate new UUID. Can someone tell me some reasons why SSKeychain not retains data.

Thanks in advance!

sorry for my english :)

回答1:

Try this in your appdelegates for Objective C

NSString *uniqueId = [SSKeychain passwordForService:@"YOUR_PROJECT_IDENTIFIER" account:@"unique_id"];

if ([uniqueId length]==0)
{
      uniqueId = [AppDelegate uuid];
      [SSKeychain setPassword:uniqueId forService:@"Store credentials in Keychain Identifier" account:@"unique_id"];
}
[[NSUserDefaults standardUserDefaults] setValue:uniqueId forKey:@"iPhoneUniqueID"];
NSLog(@"Device_ID:%@",uniqueId);

来源：https://stackoverflow.com/questions/39990629/sskeychain-not-retain-data