iOS Adding up NSNumber's formatted as Currency

[gijibo]

Hi,

I've been trying desperately to find how to do this.

I have a series of products stored in a dictionary (which comes from a plist), each product as a "Price" key, and a number as its value. Using NSNumberFormatter, I'm able to convert to currency successfully.

How do I add them up?

I have a table view, which lists all the products and their prices in the dictionary, formatted as currency. Outside of the table view but in the same class is a UILabel that I want to display the total price of all the products.

Here is the relevant code under cellForRowAtIndexPath:

	NSNumberFormatter *priceFormatter = [[NSNumberFormatter alloc] init];
	[priceFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
	NSString *price = [priceFormatter stringFromNumber:[[orderSummaryDictionary objectForKey:[self.orderSummaryArray objectAtIndex:row]] objectForKey:@"Price"]];
	[priceFormatter release];
	
	
	cell.productName.text = [self.orderSummaryArray objectAtIndex:row];
	cell.productDescription.text = [[orderSummaryDictionary objectForKey:[self.orderSummaryArray objectAtIndex:row]] objectForKey:@"Description"];
	cell.productPrice.text = price;
	cell.productImage.image = [UIImage imageNamed:imageFile];
	cell.productImage.layer.masksToBounds = YES;
	cell.productImage.layer.cornerRadius = 5.0;

There are two problems: how I add them and how I display the final tally? For the final tally, I need to set the UILabel in ViewDidLoad, but that is called before the above is called. How do I add all the prices, then display that in the UILabel?

Any help would be amazing.

Thanks!!

 

[dejo]

For the final tally, I need to set the UILabel in ViewDidLoad...

Why?

P.S. Remember that Objective-C is case-sensitive. There is no ViewDidLoad.

 

[Luke Redpath]

This doesn't answer your question, but I'd advise against creating a new number formatter each time in tableView:cellForRowAtIndexPath: as it's creation is quite expensive and will affect your table view scrolling performance. Create one once, and re-use it.