I'm using NSNumberFormatter to convert number into RUB currency representation.
This is my code:
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle: NSNumberFormatterCurrencyStyle];
[formatter setCurrencyCode:#"RUB"];
NSLog(#"String With Number:%#",[formatter stringFromNumber:sum]);
Everything works fine while I use simulator but at real device I keep getting string with broken encoding.
Example:
What I should get:
RUB99.00
What I really get:
99,00¬†—А—Г–±
How could I fix it? And why it happens?
Related
I would like to create a formatted output of a floating point number with correct localization on Cocoa-Touch. The output should be equivalent to that of printf("%<a>.<b>f", n), where <a> is the total number of digits and <f> is the maximum number of fractional digits.
Setup of NSNumberFormatter with <a>=6 and <f>=2: (Platform is iOS 5.1 SDK, Xcode 4.3.3 and the iPhone Simulator 5.1)
NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];
[nf setNumberStyle:NSNumberFormatterDecimalStyle];
[nf setPaddingCharacter:#" "];
[nf setUsesGroupingSeparator:NO];
[nf setLocale:[NSLocale autoupdatingCurrentLocale]];
[nf setUsesSignificantDigits:YES];
[nf setMaximumSignificantDigits:6];
[nf setMaximumFractionDigits:2];
[nf setRoundingMode:NSNumberFormatterRoundFloor];
NSLog(#"Test: %#", [nf stringFromNumber:[NSNumber numberWithDouble:2.64324897]]);
Expected output (with German locale): Test: 2,64
Observed output (with German locale): Test: 2,64324
Other observations:
I have tried to use different values for the fraction digits, e.g. [nf setMaximumFractionDigits:4] or [nf setMaximumFractionDigits:0]. The result is unchanged, it appears that the fraction digits are ignored. Changing the locale to US only changes the , to a ., not the number of fraction digits.
Question: How can I translate the printf-format string correctly to an NSNumberFormatter?
Ryan is not totally wrong. Use the localizedStringWithFormat method:
using objective-c
NSNumber *yourNumber = [nf numberFromString:yourString];
//to create the formatted NSNumber object
NSString *yourString = [NSString localizedStringWithFormat:#"%.2F", yourNumber];
//to create the localized output
using SWIFT 3
let yourString: String
yourString = String.localizedStringWithFormat("%.2F", yourDoubleNumber) //no need for NSNumber Object
A little bit late but it still might help. Good luck!
Ok, so I am writing a calculator app now. So far, I'm not having much luck in regard to decimals (my most recent approach hasn't worked well).
-(void) DecimalAdded
{
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
[formatter setAlwaysShowsDecimalSeparator:YES];
[formatter setGeneratesDecimalNumbers:YES];
[formatter setDecimalSeparator:#"."];
//first convert the float value of CN into NSnumber
NSNumber *nextstepNumFromCNF= [NSNumber numberWithFloat:currentNumber];
//now we have to convert that number into a string
NSString *CNconverted = [formatter stringFromNumber:nextstepNumFromCNF];
NSNumber *CNdecmAddedAndReadyForPars = [formatter numberFromString:CNconverted];
currentNumber = currentNumber*10 + [CNdecmAddedAndReadyForPars floatValue];
CalculatorScreen = [NSMutableString stringWithFormat: #"%#", CNconverted];
I can append the string to the Calculator screen I can say the number is 1, I see "1." as I'm typing. However this is usually converted to 1 during th float conversion (which is correct).
What is this best way to accomplish this?
The following yields 6000:
firstLabel.text = [[NSString alloc] initWithFormat:#"%f",(6*pow(10,3))];
How can this be made to display the number in scientific notation, like 6 x 10^3 or 6e3?
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html
in short you want %e.
Look at NSNumberFormatter and NSNumberFormatterScientificStyle.
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterScientificStyle];
NSString *formattedNumber = [formatter stringFromNumber:someNSNumber];
And yes, release your formatter.
I want to format my UILabel with commas or better with a dollar sign and commas (with no decimal).
Here is the code I am using:
IBOutlet UILabel *labelrev
float rev = (x + y)
labelrev.text = [[NSString alloc] initWithFormat:#%2.f",rev];
I get xxxxxxxxx as the output I want to get xxx,xxx,xxx or $xxx,xxx,xxx
How do I do that?
You should definitely use NSNumberFormatter for this. The basic steps are:
Allocate, initialize and configure your number formatter.
Use the formatter to return a formatted string from a number. (It takes an NSNumber, so you'll need to convert your double or whatever primitive you have to NSNumber.)
Clean up. (You know, memory management.)
This code sets up the number formatter. I've done everything that you want except the currency bit. You can look that up in the documentation.
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterCurrencyStyle];
NSString *groupingSeparator = [[NSLocale currentLocale] objectForKey:NSLocaleGroupingSeparator];
[formatter setGroupingSeparator:groupingSeparator];
[formatter setGroupingSize:3];
[formatter setAlwaysShowsDecimalSeparator:NO];
[formatter setUsesGroupingSeparator:YES];
Next, you want to set up your number and return a formatted string. In your case, we wrap a double in an NSNumber. I do it inline, but you can break it up into two steps:
NSString *formattedString = [formatter stringFromNumber:[NSNumber numberWithFloat:rev];
Don't forget to clean up!
[formatter release];
A quick note about localization:
The NSLocale class provides some useful info about the user's locale. In the first step, notice how I used NSLocale to get a localized grouping separator:
NSString *groupingSeparator = [[NSLocale currentLocale] objectForKey:NSLocaleGroupingSeparator];
(Some countries use a full-stop/period, while others use a comma.) I think there's a way to get a localized currency symbol as well, but I'm not one hundred percent sure, so check the documentation. (It depends upon what your trying to do.)
You will need to use a NSNumberFormatter which supports currency.
NSNumberFormatter *currencyFormatter = [[NSNumberFormatter alloc] init];
[currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
NSLog(#"%#", [currencyFormatter stringFromNumber:[NSNumber numberWithInt:10395209]]);
[currencyFormatter release];
Prints: $10,395,209.00
[formatterCurrency setMaximumFractionDigits:0]
is only way to trancate decimal digits and decimal separator in a NSNumberFormatterCurrencyStyle formatter.
NSNumberFormatter *formatterCurrency;
formatterCurrency = [[NSNumberFormatter alloc] init];
formatterCurrency.numberStyle = NSNumberFormatterCurrencyStyle;
[formatterCurrency setMaximumFractionDigits:0];
[formatterCurrency stringFromNumber: #(12345.2324565)];
result
12,345 $
Is their a built-in way of formatting string as $ price, e.g. 12345.45 converted to $12,345.45?
Assuming you are using Cocoa (or just Foundation), you can use NSNumberFormatter and set its style to currency:
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterCurrencyStyle];
... = [formatter stringFromNumber:number];
By default it uses the locale of your system, but you can change that and lots of other properties, see the NSNumberFormatter API docs.
Assuming the price is held in a float, you probably want +localizedStringWithFormat:.
NSString *priceString = [NSString localizedStringWithFormat:#"$ %'.2f",price];
Hmmm... Apple says they follow the IEEE standard for printf, so it should accept the ' flag, but it doesn't work on Tiger. NSNumberFormatter it is.
You need to get rid of the ' character
So, just have this:
NSString *priceString = [NSString localizedStringWithFormat:#"$ %.2f", price];
NSString *formatedNumbers = [NSNumberFormatter localizedStringFromNumber:myNumber numberStyle:NSNumberFormatterCurrencyStyle];