對于理財，借款類APP來說，沒有比千分位格式化來顯示某些數(shù)據(jù)更有說明力了，最近剛好用到這個東西，就說一下吧。

• (NSString *)thousandSeparatWith:(NSString *)string{
  if (string.length<=0 || [string isEqualToString:@"(null)"]) {//判斷值是否存在
  return @"0.00";
  }else if (string.floatValue < 1000) {//如果小于1000則不需要添加千分符
  return string;
  }else{
  NSString *integerString = @"";
  NSString *decimalString = @"00";
  if ([string rangeOfString:@"."].location != NSNotFound) {
  //帶小數(shù)的情況下需要根據(jù)小數(shù)點切分，然后再添加千分符
  integerString = [[string componentsSeparatedByString:@"."] firstObject];
  decimalString = [[string componentsSeparatedByString:@"."] lastObject];
  }else{
  integerString = [[string componentsSeparatedByString:@"."] firstObject];
  }
  NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
  [numberFormatter setPositiveFormat:@",###"];
  NSString * lastString = [NSString stringWithFormat:@"%@.%@",[numberFormatter stringFromNumber:[NSNumber numberWithDouble:integerString.doubleValue]],decimalString];

  return lastString;
  

  }
  return @"";
  }