How to store UISegmentedControle state in NSUserdefaults

Question

The problem is when de selectedSegmentIndex is unselected: "UISegmentedControlNoSegment" alias "-1".

The other states (0, 1, 2 , etc.), I can store as Integers and retrieve with

carTypeSegmentedControl.selectedSegmentIndex = [defaults integerForKey:@"typeOfCar"];

But -1 is no NSInteger.

I also tried to remove the Integer out of the NSUserdefaults but a request would return an "0", which is not acceptable.

So, is there another easy way?

score 2 · Answer 1 · answered Apr 12 '10 at 21:21

2

-1 is an integer, it's a negative integer. You should be able to store this in NSUserDefaults.

answered Apr 12 '10 at 21:21

Ben Gottlieb

85,404
22
176
172

Ditto. Perhaps the OP is confusing NSInteger with NSUInteger? – Amagrammer Apr 12 '10 at 22:27
If -1 is being retrieved as an unsigned int, the OP might report getting MAX_INT back. – Alex Reynolds Apr 12 '10 at 22:29

score 2 · Answer 2 · answered Apr 12 '10 at 22:20

You need to use NSNumber, which is an object representation of values of common numerical and boolean types, e.g. to set:

[[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithInt:-1] forKey:kDefaultCarSegmentedControlState];

To retrieve:

NSInteger defaultCarSegmentedControlSelectedIndex = [[[NSUserDefaults standardUserDefaults] objectForKey:kDefaultCarSegmentedControlState] intValue];

score 0 · Answer 3 · answered Apr 13 '10 at 06:15

You are right Ben, -1 is indead an integer. And it is stored after all. I did an NSLog on that. Stupid i didn't try that. I didn't find clear documentation on that.

So probably my problem is somewhere els.

I guess your answer works as well, Alex.

Thank you for helping

How to store UISegmentedControle state in NSUserdefaults

3 Answers3