How to store UITextView data into NSMutablearray?

Question

This time I am having problems with not being able to store some data in an NSMutablearray.

The process is like this:

I click on a button that loads a UIPopOver and I make the selection of a product and its amount, through UIPIckerView, when I click the Done button, the amount, product and total price appears on a UITextView. I'm ok with that.

The problem is that I need to store each selection from the UIPickerView in the NSMutablearray for a later calculation of the sum of all products selected, but it is not storing in the NSMutablerarray.

So, anyone could help???

-(void)donePressed{



//Cálculo do valor a pagar
float quantFlt = [[arrayQtdProdutos objectAtIndex:[categoryPicker selectedRowInComponent:1]] floatValue];
float valorFlt = [[valorArray objectAtIndex:[categoryPicker selectedRowInComponent:0]] floatValue];
float total = quantFlt * valorFlt;

_msg = [NSString stringWithFormat: @"%@ - %@ - R$ %.2f",
        [arrayQtdProdutos objectAtIndex:[categoryPicker selectedRowInComponent:1]],
        [arrayOfCategories objectAtIndex:[categoryPicker selectedRowInComponent:0]],
        total];

_txtViewProdutos.text = [NSString stringWithFormat:@"%@ \n%@", _txtViewProdutos.text, _msg];

[arrayProdutosComprados addObject:_msg];
NSLog(@"%i", arrayProdutosComprados.count);

[popOverController dismissPopoverAnimated:YES];
}

'msg'is a NSString that gets the amount, product and price of the selected row. And then is shown at the UITextView. — Marco Almeida
– Marco Almeida, Commented Nov 14, 2013 at 16:56
If you set a break point after you set msg I suspect that its going to be nil. So again, is it supposed to be a property? — Peter Foti
– Peter Foti, Commented Nov 14, 2013 at 16:56
Aparently yes, when I NSLog the NSMutablearray count it gets me '0'. As to whether should be a property or no, I think no. — Marco Almeida
– Marco Almeida, Commented Nov 14, 2013 at 17:01
You should add a property @property (strong, nonatomic) NSString *msg then change msg = to self.msg = And when you want to use it call self.msg — Peter Foti
– Peter Foti, Commented Nov 14, 2013 at 17:04

Marco Almeida · Accepted Answer · 2013-11-15 12:55:30Z

This is the correct code with the help of @SPA.

-(void)donePressed{

//Cálculo do valor a pagar
float quantFlt = [[arrayQtdProdutos objectAtIndex:[categoryPicker selectedRowInComponent:1]] floatValue];
float valorFlt = [[valorArray objectAtIndex:[categoryPicker selectedRowInComponent:0]] floatValue];
float total = quantFlt * valorFlt;

_msg = [NSString stringWithFormat: @"%@ - %@ - R$ %.2f",
    [arrayQtdProdutos objectAtIndex:[categoryPicker selectedRowInComponent:1]],
    [arrayOfCategories objectAtIndex:[categoryPicker selectedRowInComponent:0]],
    total];

_txtViewProdutos.text = [NSString stringWithFormat:@"%@ \n%@", _txtViewProdutos.text, _msg];

[arrayProdutosComprados addObject:_msg];
NSLog(@"%i", arrayProdutosComprados.count);

[popOverController dismissPopoverAnimated:YES];
}


- (void)viewDidLoad
{
[super viewDidLoad];

arrayProdutosComprados = [NSMutableArray new];
}

Szabi Tolnai · Accepted Answer · 2013-11-14 19:17:44Z

0

I agree with SPA, it is more than likely that arrayProdutosComprados is nil.

answered Nov 14, 2013 at 19:17

Szabi Tolnai

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