UISegmentedControl get previous selected index

Question

I have a UISegmentedControl with a segmentedValueChanged method on it. I need to find out what was the selected index before this method is called . How to do this?

Answer 1

Use this function:

@property (nonatomic, assign) NSInteger oldSegmentedIndex;
@property (nonatomic, assign) NSInteger actualSegmentedIndex;
.......

- (void)viewDidLoad
{
    .......
    self.oldSegmentedIndex = -1;
    self.actualSegmentedIndex = self.segmentedControl.selectedSegmentIndex;
    .......
}
.......
- (IBAction)didSegmentedValueChanged:(id)sender
{
    //Do whatever you want
    self.oldSegmentedIndex = self.actualSegmentedIndex;
    self.actualSegmentedIndex = self.segmentedControl.selectedSegmentIndex;
}

Answer 2

The best way is to keep a variable that holds the last selected index. Then you just check it's value when you need