Getting the Device ID before running ViewController code in IOS - ios

Question

I have this peace of code to get device id :
-(void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
NSString *devicetokenRN = [NSString stringWithFormat:#"%#", deviceToken];
devicetokenRN = [devicetokenRN stringByReplacingOccurrencesOfString:#" " withString:#""];
devicetokenRN = [devicetokenRN stringByReplacingOccurrencesOfString:#"<" withString:#""];
devicetokenRN = [devicetokenRN stringByReplacingOccurrencesOfString:#">" withString:#""];
// send device token for APNS without spaces or <>
DeviceID *DeviceIdentifier = [[DeviceID alloc ] init];
// sending it to the Device.h
[DeviceIdentifier setDeviceID:devicetokenRN];
}
I need to retrieve this DeviceID as the first thing on my ViewController. As it doesn't do this function before it runs the view controller, because if I use NSlog in the ViewController it is NULL as it hasn't run this first. I need to get some variable like this first before it runs the UITableView. Any ideas would be brilliant thanks.

Answer 1

In AppDelegate, you can save the deviceToken value in NSUserDefaults like
put these line in didRegisterForRemoteNotificationsWithDeviceToken method in appdelegate.m like this
-(void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
[[NSUserDefaults standardUserDefaults] setObject:deviceToken forKey:#"DeviceToken"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
also put this line of code in your view Controller.m and In ViewDidLoad method
and Retrieve that value.
[[NSUserDefaults standardUserDefaults] objectForKey:#"DeviceToken"];

Answer 2

You can get and store your deviceId in NSUserDefaults
-(void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
NSUUID *identifierForVendor = [[UIDevice currentDevice] identifierForVendor];
NSString *deviceId = [identifierForVendor UUIDString];
NSUserDefaults *userRegistrarionDetails = [NSUserDefaults standardUserDefaults];
[userRegistrarionDetails setObject:deviceId forKey:#"deviceID"];
[userRegistrarionDetails synchronize];
}
And you can get anywhere in your whole project by
NSUserDefaults *userRegistrarionDetails = [NSUserDefaults standardUserDefaults];
NSString * deviceId = [userRegistrarionDetails objectForKey:#"deviceID"];
NSLog(#"%#", deviceId);