double 型转换成 金额

`objc

• (NSString )priceString:(double)input {
  DDLogDebug(@”input %f”,input);
  NSNumber price = [NSNumber numberWithDouble:input];
  DDLogDebug(@”price %@”,price);
  NSNumberFormatter *nf = [NSNumberFormatter new];
  [nf setNumberStyle:NSNumberFormatterCurrencyStyle];
  nf.locale = [NSLocale localeWithLocaleIdentifier:@”zh_CN”];
  DDLogDebug(@”nf %@”,[nf stringFromNumber:price]);
  return [nf stringFromNumber:price];
  }