NSString removeLeadingZeros

NSString+Zeros

@interface NSString (Zeros)

-(NSString*)removeLeadingZeros;

-(NSString*)addLeadingZerosTillLength:(int)length;

@end



@implementation NSString (Zeros)

-(NSString*)removeLeadingZeros {
    return [self stringByReplacingOccurrencesOfString:@"^0+" withString:@"" options:NSRegularExpressionSearch range:NSMakeRange(0, self.length)];
}

-(NSString*)addLeadingZerosTillLength:(int)length {
    NSMutableString *mutableString = [NSMutableString stringWithString:[self copy]];
    for (int currentLength = mutableString.length; currentLength <= length-1; currentLength++) {
        [mutableString insertString:@"0" atIndex:0];
    }
    return mutableString;
}

@end