如何在十进制和整数之间拆分NSDecimalnumber

NSDecimalNumber *decimalNumber = [NSDecimalNumber decimalNumberWithString:@"123.456"];
NSString *stringRepresentation = [decimalNumber stringValue];

NSRange decimalSeparatorRange = [stringRepresentation rangeOfString:@"."];

NSString *integerPart;
NSString *fractionalPart;

if (decimalSeparatorRange.location != NSNotFound) {
    integerPart = [stringRepresentation substringToIndex:decimalSeparatorRange.location];
    fractionalPart = [stringRepresentation substringFromIndex:decimalSeparatorRange.location + 1];
} else {
    integerPart = stringRepresentation;
    fractionalPart = @"0";
}

NSLog(@"Integer part: %@", integerPart);
NSLog(@"Fractional part: %@", fractionalPart);

Integer part: 123
Fractional part: 456