iOS 判断当前时间是否处于某个时间段内

/**
 if ([self isBetweenFromHour:9 toHour:15]) {
 LOG(@"处于时间段内");
 }else {
 LOG(@"处于时间段外");
 }
 * @brief 判断当前时间是否在fromHour和toHour之间。如，fromHour=8，toHour=23时，即为判断当前时间是否在8:00-23:00之间
 */
- (BOOL)isBetweenFromHour:(NSInteger)fromHour toHour:(NSInteger)toHour {

    NSDate *dateFrom = [self getCustomDateWithHour:fromHour];
    NSDate *dateTo = [self getCustomDateWithHour:toHour];

    NSDate *currentDate = [NSDate date];
    LOG(@"dateFrom=%@---dateTo=%@---currentDate=%@",dateFrom,dateTo,currentDate);
    if ([currentDate compare:dateFrom]==NSOrderedDescending && [currentDate compare:dateTo]==NSOrderedAscending) {
        // 当前时间在9点和10点之间
        return YES;
    }
    return NO;
}

/**
 * @brief 生成当天的某个点（返回的是伦敦时间，可直接与当前时间[NSDate date]比较）
 * @param hour 如hour为“8”，就是上午8:00（本地时间）
 */
- (NSDate *)getCustomDateWithHour:(NSInteger)hour {
    //获取当前时间
    NSDate *currentDate = [NSDate date];
    NSCalendar *currentCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *currentComps = [[NSDateComponents alloc] init];

    NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;

    currentComps = [currentCalendar components:unitFlags fromDate:currentDate];

    //设置当天的某个点
    NSDateComponents *resultComps = [[NSDateComponents alloc] init];
    [resultComps setYear:[currentComps year]];
    [resultComps setMonth:[currentComps month]];
    [resultComps setDay:[currentComps day]];
    [resultComps setHour:hour];

    NSCalendar *resultCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    return [resultCalendar dateFromComponents:resultComps];
}