Objective-C : Using UserPreference #objective-c #userpreference

userPreference.m

userPreference = [NSUserDefaults standardUserDefaults];

// Check for a value of a specific key
if([userPreference objectForKey:@"login_info"]){
  NSString *userInfo = [userPreference objectForKey:@"login_info"];
  NSArray *tokens = [userInfo componentsSeparatedByString:@"/"];
  [self.telephoneTextField setText:[tokens objectAtIndex:0]];
  [self.passwordTextField setText:[tokens objectAtIndex:1]];
  [self login:self];
}

// save login so that the user doesn't have to input login info again
if([userPreference objectForKey:@"login_info"] == nil){
  NSString *user_info = [NSString stringWithFormat:@"%@/%@", telephoneTextField.text, passwordTextField.text];
  [userPreference setValue:user_info forKey:@"login_info"];
  [userPreference synchronize];
}