UIPickerController - want to show specific selection upon loading - xcode

Question

I have a custom UIPickerView that is embedded into an UIActionsheet that comes up half the screen when called. Works great. The problem is that I want to have the barrelPicker be showing the 'most probable' results as the selection when it first comes up (after all the data has been loaded into it).
Prior to having the custom picker embedded in the action sheet, I had it in a UIViewController and was just calling "showProbableResults" (a custom method of mine) in the viewDidLoad method of the ViewController, because I knew at that point, the UIPickerView would be loaded up and ready to go. Is there an equivalent place for me to call this method now or do I need to rethink my whole design? Essentially, what I need is a place to call this after the UIPickerView has been loaded.
- (void)startWithDelegate:(UIViewController <ImageProcessingDelegate> *)sender
{
self.delegate = sender;
self.showFirstBottle = YES;
[self start];
}
- (void) start {
self.actionSheet = [[UIActionSheet alloc] initWithTitle:#"Choose Something"
delegate:self
cancelButtonTitle:nil
destructiveButtonTitle:nil
otherButtonTitles:nil];
[self.actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
CGRect pickerFrame = CGRectMake(0, 40, 0, 0);
NSLog(#"1.) About to alloc the picker");
self.vintagePicker = [[UIPickerView alloc] initWithFrame:pickerFrame];
self.vintagePicker.showsSelectionIndicator = YES;
self.vintagePicker.dataSource = self;
self.vintagePicker.delegate = self;
[self.actionSheet addSubview:self.vintagePicker];
[self.vintagePicker release];
UISegmentedControl *nextButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:#"Next"]];
nextButton.momentary = YES;
nextButton.frame = CGRectMake(260, 7.0f, 50.0f, 30.0f);
nextButton.segmentedControlStyle = UISegmentedControlStyleBar;
nextButton.tintColor = [UIColor blackColor];
[nextButton addTarget:self action:#selector(show:) forControlEvents:UIControlEventValueChanged];
[self.actionSheet addSubview:nextButton];
[nextButton release];
UISegmentedControl *backButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:#"Back"]];
backButton.momentary = YES;
backButton.frame = CGRectMake(10, 7.0f, 50.0f, 30.0f);
backButton.segmentedControlStyle = UISegmentedControlStyleBar;
backButton.tintColor = [UIColor blackColor];
[backButton addTarget:self action:#selector(cancel:) forControlEvents:UIControlEventValueChanged];
[self.actionSheet addSubview:backButton];
[backButton release];
[self.actionSheet showInView:_delegate.parentViewController.tabBarController.view]; // show from our table view (pops up in the middle of the table)
[self.actionSheet setBounds:CGRectMake(0, 0, 320, 485)];
}

Answer 1

One option is to create a reusable picker view, as shown here, and then call the #optional
-(void)setInitialPickerValueToRow:(int)i inComponent:(int)j animated:(BOOL)k{
[pickerView selectRow:i inComponent:j animated:k];
}
from any view controller or NSObject (such as your UIActionSheetDelegate).
Your other option is to set a standard pre-chosen selection, as follows:
self.vintagePicker = [[UIPickerView alloc] initWithFrame:pickerFrame];
self.vintagePicker.showsSelectionIndicator = YES;
self.vintagePicker.dataSource = self;
self.vintagePicker.delegate = self;
[self.actionSheet addSubview:self.vintagePicker];
[self.vintagePicker selectRow:0 inComponent:0 animated:NO];
You could also have different variables that you set, and have selectRow:inComponent:animated: access those, instead of being preset.
[self.vintagePicker selectRow:myRow inComponent:0 animated:NO];
Hope this helps!