1.添加一個(gè)nsstring分類
網(wǎng)上很多方法都是 nsstring = str = [nsstring stringformate：@"%@"，@（[str floatValue]）]; 這樣如果數(shù)字很大活著位數(shù)很多會(huì)產(chǎn)生科學(xué)計(jì)數(shù)，使用自己封裝的方法完美解決

• (NSString *)formatePointZero1:(NSString *)text
  {
  NSString *numstr = text;
  NSArray *array = [numstr componentsSeparatedByString:@"."];
  if (array.count == 1) return array[0];

  if (array.count > 1) {
  while(numstr.length > 0){
  NSInteger index = numstr.length - 1;
  NSString *temp = [numstr substringWithRange:NSMakeRange(index, 1)];
  if ([temp isEqualToString:@"0"]){
  numstr = [numstr substringWithRange:NSMakeRange(0, index)];
  continue;
  }
  break;
  }

    array = [numstr componentsSeparatedByString:@"."];
    if (array.count > 1 && [array[1] isEqualToString:@""]){
        numstr = array[0];
    }
  

  }
  return numstr;
  }