macOS Remove all characters from string except 0-9 and decimals

[abcdefg12345]

i'm trying to copy strings from nspasteboard to nstextfield and exclude everything but numbers and decimals

NSPasteboard*mypasteboard = [NSPasteboard generalPasteboard];

NSString*mystring=[mypasteboard stringForType:NSPasteboardTypeString];

NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyz"];

mystring = [[mystring componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @""];

that will exclude only the things i list which will still copy the things i don't list

NSPasteboard*mypasteboard = [NSPasteboard generalPasteboard];

NSString*mystring=[mypasteboard stringForType:NSPasteboardTypeString];

NSString *newString = [[mystring componentsSeparatedByCharactersInSet:
                            [[NSCharacterSet decimalDigitCharacterSet] invertedSet]]
                           componentsJoinedByString:@""];

that will only allow numbers and i need decimals with it

NSPasteboard*mypasteboard = [NSPasteboard generalPasteboard];

NSString*mystring=[mypasteboard stringForType:NSPasteboardTypeString];

NSCharacterSet *numbers = [[NSCharacterSet characterSetWithCharactersInString:@"0123456789."] invertedSet];

NSString *newvalue = [mystring stringByTrimmingCharactersInSet:numbers];

that will only allow numbers and decimals but it still copies characters if they are in the middle of a string

is there a way that i can numbers and digits and exclude everything else



edit

don't worry about it i think i solved it

NSPasteboard*mypasteboard = [NSPasteboard generalPasteboard];
NSString*mystring=[mypasteboard stringForType:NSPasteboardTypeString];
NSString *newstring = [[mystring componentsSeparatedByCharactersInSet:
                                  [[NSCharacterSet characterSetWithCharactersInString:@"0123456789."]
                                   invertedSet]]
                                 componentsJoinedByString:@""];

 

[SomeWhores]

In an effort to push using NSLocale and supporting multiple Locales I'd recommend

Obj-c

NSCharacterSet *decimalCharacterSet = [NSCharacterSet decimalDigitCharacterSet].invertedSet;

Swift

let set: NSCharacterSet = NSCharacterSet.decimalDigitCharacterSet().invertedSet

for the decimal number set and

Obj-c

NSString *decimalSeparator = [[NSLocale currentLocale] objectForKey:NSLocaleDecimalSeparator];

Swift

let localeSeparator = NSLocale.currentLocale().objectForKey(NSLocaleDecimalSeparator)

For number separator recognition. I feel its safer to use NSLocale for those kinds of things rather than making assumptions on my user base.

¯\_(ツ)_/¯ but that's just me