NSNumberFormatter一些用法

1 .将123123123 ->123,123,123

    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
    [formatter setNumberStyle:kCFNumberFormatterDecimalStyle];
    return [formatter stringFromNumber:value];

 2   123123123 ->  $123,123,123.00

    [formatter setNumberStyle:kCFNumberFormatterCurrencyStyle];

   

           加入Locale,修改地区，就会展示不同类型的货币符号：

     NSLocale *lacale = [[NSLocale alloc] initWithLocaleIdentifier:@"it_IT"];

    [ formatter setLocale:lacale];

  

  3  0.12-》12%

    [formatter setNumberStyle:kCFNumberFormatterPercentStyle];

   4  kCFNumberFormatterSpellOutStyle  －》 以英文字幕的形式输出