阿拉伯数字转汉字

NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_Hans"];

    NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];

    formatter.locale = locale;

    formatter.numberStyle = kCFNumberFormatterRoundHalfDown;

    NSString *monthStr = [formatter stringFromNumber:@([dic[@"month"] integerValue])];

    NSString *str = [monthStr stringByAppendingString:@"月小账单"];