UITextfiled validate country currency in between 1 - 100 - ios

Question

How to validate UITextfield in between 1 to 100 currency value accepted of maximum 2 decimal values.
Valid.
0.25 99.99, 1.99,100.00.
Other country currency decimal represent , also.
0,25
99,99
1,99
100,00
Invalid
00.25, 100.25, 0000000.00, 0.125, 9.567
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc]init];
numberFormatter.locale = [NSLocale currentLocale];// this ensures the right separator behavior
numberFormatter.numberStyle = NSNumberFormatterCurrencyStyle;
numberFormatter.usesGroupingSeparator = YES;
numberFormatter.usesSignificantDigits = YES;
numberFormatter.currencyGroupingSeparator = numberFormatter.locale.groupingSeparator;
numberFormatter.decimalSeparator = numberFormatter.locale.decimalSeparator;
NSString *expression = #"^([0-9]+)?(\\.,([0-9]{1,2})?)?$";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:expression
options:NSRegularExpressionCaseInsensitive error:nil];
NSUInteger numberOfMatches = [regex numberOfMatchesInString:newString
options:0 range:NSMakeRange(0, [newString length])];
if (numberOfMatches == 0)
return NO;
not working unable to press , inside UITextfield . sweden currency decimal represent "," not "." I want work calculation two entered value one is int another value is float

Answer 1

In the UItTxtfield delegate method try this code.
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSInteger Currency = [textField.text integerValue];
if(Currency >= 100)
{
return NO;
}
else
{
NSString *enteredCurrency=textField.text;
if([enteredCurrency containsString:#"."])
{
NSArray *array=[enteredCurrency componentsSeparatedByString:#"."];
if([array[1] length] >= 2 || [array[0] length] >= 2)
{
return NO;
}
else
{
return YES;
}
}
else
{
return YES;
}
}
}

Answer 2

It's not recommended to implement this by yourlsef since its not scalable. You need to use NumberFormatter (or NSNumberFormatter for ObjC)
let formatter = NumberFormatter()
formatter.numberStyle = NumberFormatter.Style.currency
formatter.allowsFloats = false
formatter.maximumFractionDigits = 2 //you get to control how to present the price.
formatter.locale = locale //This should be the country Locale you need. for example: "en-us"
note that NSLocale gives you access to also grouping seperator and decimal separator, so you can check it later if you like.
formatter.currencyGroupingSeparator = locale.groupingSeparator
formatter.decimalSeparator = locale.decimalSeparator