How to get the correct value and type of NSNumber? - objective-c

Question

I am creating an NSNumber from string by check if the string is float or int using NSNumberFormatter. I want to have a method to return what type the NSNumber holds and the correct value. It works for int, but not working for decimal numbers.
NSNumber *n;
enum CFNumberType _numberType;
- (instancetype)initWithString:(NSString *)string {
self = [super init];
if (self) {
NSNumberFormatter *formatter = [NSNumberFormatter new];
decimalPattern = #"\\d+(\\.\\d+)";
if ([Utils matchString:string withPattern:decimalPattern]) {
// Float
formatter.numberStyle = NSNumberFormatterDecimalStyle;
_numberType = kCFNumberDoubleType;
n = [formatter numberFromString:string];
} else {
// Integer
formatter.numberStyle = NSNumberFormatterNoStyle;
_numberType = kCFNumberIntType;
n = [formatter numberFromString:string];
}
self = [self initWithNumber:n];
}
return self;
}
- (CFNumberType)value {
CFNumberType num; // How to determine the type of num?
CFNumberGetValue((CFNumberRef)n, _numberType, &num);
return num;
}
- (CFNumberType)numberType {
return _numberType;
}
In the value method, if I specify float num, then it works for floating point. But I cannot use float because I want to make it work for int as well. How to do this?

Answer 1

I have found a solution for this. First check if the number is double and call the appropriate value method.
- (BOOL)isDouble {
if (_numberType == kCFNumberFloatType || _numberType == kCFNumberFloat32Type || _numberType == kCFNumberFloat64Type || _numberType == kCFNumberDoubleType) {
return YES;
}
return NO;
}
- (double)doubleValue {
if ([self isDouble]) {
return [n doubleValue];
}
return 0.0;
}
- (int)intValue {
if (![self isDouble]) {
return [n intValue];
}
return 0;
}