Question

In my app I try to check if user enters right decimal separator depending on local settings (if user makes mistake, that pice of data doesn’t enter CoreData database) :

- (void)save {
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];

NSLocale *locale = [NSLocale currentLocale];

I get user input:

NSString *firstForDistance = _forDistanceTextField.text;

try to extract decimal separator from string:

NSString *separator = [firstForDistance decimalSeparator];

than check if separator fits users local settings or he made typo. In case of typo or mistake i replace it with decimal separator from his local settings:

if (separator != [locale objectForKey:NSLocaleDecimalSeparator]) {
    firstForDistance = [firstForDistance stringByReplacingOccurrencesOfString:separator withString:[locale objectForKey: NSLocaleDecimalSeparator]];
}

Rest of code:

self.user.forDistance = [numberFormatter numberFromString:firstForDistance];

[self.delegate usersMakeViewController:self addUser:self.user];
}

That would be nice and easy, but extracting doesn’t work:

NSString *separator = [firstForDistance decimalSeparator];

method “decimalSeparator” is instance method from NSNumberFormatter and i get fault from Xcode.

How I can fix that?

Answer 1

You can check like below string have decimalSeparator or not

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
    [numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
    [numberFormatter setLocale:[NSLocale currentLocale]];
    if ([textField.text rangeOfString:numberFormatter.decimalSeparator].location != NSNotFound) 
        NSLog(@"YES,  Give number has decimalSeparator");
    else
        NSLog(@"NO, dont have decimalSeparator");