Question

I am trying to store the Segment Index of a SegmentedControl in NSUserDefaults.

Here is the code for loading the preferences and the preferences ‘SAVE’ button.

- (void)viewDidLoad
{
   [super viewDidLoad];
   // Get the stored data before the view loads
   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

   int yPrefSegment = [defaults integerForKey:@"yPref"];

   prefYsegmentedControl.selectedSegmentIndex = yPrefSegment;

}

- (IBAction)savePrefButton:(id)sender
{

   int yPref = [[prefYsegmentedControl.selectedSegmentIndex] integerValue];

   NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
   [defaults synchronize];

   NSLog(@"Data saved");
}

I am getting an error on the line (in the savePrefButton) :

int yPref = [[prefYsegmentedControl.selectedSegmentIndex] integerValue]; 

Error is: Expected Identifier

I am lost here. Don’t know what it is talking about.

Thank you.

Answer 1

You have one syntax error and two semantical errors.

The syntax error:

[prefYsegmentedControl.selectedSegmentIndex]

Choose one of the method call or dot notation for accessing properties. Use either

[prefYsegmentedControl selectedSegmentIndex]

or

prefYsegmentedControl.selectedSegmentIndex

The first semantical error:

prefYsegmentedControl.selectedSegmentIndex

is already an integer. No need to call integerValue on it. (You can’t send messages to primitive types anyway. This is not Smalltalk.)

The second semantical error: you don’t actually store the index in NSUserDefaults. Insert

[defaults setInteger:yPref forKey:@"yPref"];

before you synchronize the user defaults.