How To Get Selected Value From UIPickerView With 2 Components

Question

I have a question here where I asked how to get a value form UIPickerView ( How To Get Selected Value From UIPickerView ). I got a solution for a picker with 1 component but I'm trying to get the value from picker with 2 component now.

This code works for picker with 1 component:

    NSInteger row;
    NSString *weightSelected;

    row = [repPicker selectedRowInComponent:0];
    weightSelected = [pickerArray objectAtIndex:row];

I tired this code for my picker with 2 components, but it is freezing. There is no error in the console either. The line it is freezing at is row2 = [repPicker selectedRowInComponent:1]; :

    NSInteger row1, row2;
    NSString *weightSelected1;
    NSString *weightSelected2;

    row1 = [repPicker selectedRowInComponent:0];
    row2 = [repPicker selectedRowInComponent:1];
    weightSelected1 = [pickerArray objectAtIndex:row1];
    weightSelected2 = [pickerArray objectAtIndex:row2];
    NSString *weightSelected = [NSString stringWithFormat:@"%@.%@", weightSelected1, weightSelected2];

UPDATE:

#pragma mark - Weight Picker 
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView 
{
    if (thePickerView.tag==1)
    {
    return 2;
    }
    else
        return 1;
}

- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component 
{
    if (thePickerView.tag==1)
    {
        if (component == 0)
            return [pickerArray count];
        if (component == 1)
            return [pickerArrayHalf count];
    }
    else
        return [pickerArray count];
}

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

   // NSLog(@"Selected Color: %@. Index of selected color: %i", [weightArray objectAtIndex:row], row);
}

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
    if (pickerView.tag==1)
    {
        if (component == 0)
        {
            UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 37)];
            int weight = [[pickerArray objectAtIndex:row] intValue];
            label.text = [NSString stringWithFormat:@"%d", weight];

            label.textAlignment = UITextAlignmentCenter;
            label.backgroundColor = [UIColor clearColor];
            label.font = [UIFont boldSystemFontOfSize:30];
            [label autorelease];
            return label;
        }

        else
        {
            UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 37)];
            label.text = [pickerArrayHalf objectAtIndex:row];
            label.textAlignment = UITextAlignmentCenter;
            label.backgroundColor = [UIColor clearColor];
            label.font = [UIFont boldSystemFontOfSize:30];
            [label autorelease];
            return label;
        }
    }

    else
    {
        int reps = [[pickerArray objectAtIndex:row] intValue];
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 37)];
        label.text = [NSString stringWithFormat:@"%d reps", reps];
        label.textAlignment = UITextAlignmentCenter;
        label.backgroundColor = [UIColor clearColor];
        label.font = [UIFont boldSystemFontOfSize:30];
        [label autorelease];
        return label;
    }
}

Update again:

I added this code:

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

    NSLog(@"Selected Color: %@. Index of selected row: %i", [pickerArray objectAtIndex:row], row);
    NSLog(@"Component 0: %@", [repPicker selectedRowInComponent:0]);
    NSLog(@"Component 1: %@", [repPicker selectedRowInComponent:1]);
}

I now get a crash when scrolling the clicker now at line: NSLog(@"Component 1: %@", [repPicker selectedRowInComponent:1]);

error:

* Terminating app due to uncaught exception 'NSRangeException', reason: '* -[NSMutableArray objectAtIndex:]: index 1 beyond bounds [0 .. 0]'

I also got Component 0: (null)

Update:

Code for declaring pickerArray:

pickerArray = [[NSMutableArray alloc] initWithCapacity:700];
    for ( int i = 0 ; i <= 1000 ; ++i)
        [pickerArray addObject:[NSString stringWithFormat:@"%d", i]];

    pickerArrayHalf = [[NSMutableArray alloc]initWithCapacity:2];
    [pickerArrayHalf addObject:@"0 lb"];
    [pickerArrayHalf addObject:@"1/2 lb"];

Answer 1

Freezing? Wear a sweater :-) Actually, what does the log say - do you know where it's freezing? Put NSLog statements to find the exact line, or step through with the debugger.

Answer 2

Maybe a NSLog(@"repPicker: %@", repPicker); could help to figure out what is going on there.

Edit: You are initializing the pickerArray with capacity 700 and add 1000 objects. This does not work. I would use pickerArray = [[NSMutableArray] alloc] init]; and add the 1000 objects.