CODEWITHSUNDEEP
objective-ciosuipickerview
OhDoh
OhDoh

Reputation: 433

Get value from UIPickerView

I can't get initial value from UIPickerView.

Here is some code: 

.......
#define kMaximumPlayers 15
......
   - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) 
        {
            self.totalPlayersPossible = [NSMutableArray array];

            for (int x = 2; x < kMaximumPlayers; x++) 
            {
                [_totalPlayersPossible addObject:[NSNumber numberWithInt:x]];
            }
        }
        return self;
    }


    - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
    {
        return [NSString stringWithFormat:@"%@", [self.totalPlayersPossible objectAtIndex:row]];


    - (void)viewDidLoad
    {
        [super viewDidLoad];
        [self.pickverView selectRow:0 inComponent:0 animated:YES];
    }
 }

When I run the app first row of UIPickerView is selected. The problem is that I can't get the value of that row:

   - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
    {
//here I get the value of selected row

       [self setNumberOfSelectedPlayers:[[self.totalPlayersPossible objectAtIndex:row]intValue]];
    }

The value of setNumberOfSelectedPlayers is 0.

What I miss here ?

Upvotes: 0

Views: 3540

Answers (2)

Mike Fahy
Mike Fahy

Reputation: 5707

As Novarg says, the didSelectRow: message is not called on load. You can call the pickerView: titleForRow: inComponent message directly, though, to obtain the title of the currently selected item at any time. Assuming the title you want is in the first "reel" (component) of the picker view:

NSString *initialTitle = [self pickerView:self.pickerView
                              titleForRow:[self pickerView selectedRowInComponent:0]
                             forComponent:0 
];

This assumes self serves as the UIPickerViewDelegate for the pickerView, of course.

Upvotes: 3

Novarg
Novarg

Reputation: 7440

The problem is that the first time you see that UIPickerView the method 

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

does not get called because you did not select it. That method is only called when you effectively select a row(scroll and select one of them).

Hope it helps

Upvotes: 1

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