//使用示例
if ([self isBetweenFromHour:9 toHour:10]) {  
}  

/** 
 * 判斷當前時間是否在fromHour和toHour之間。如，fromHour=8，toHour=23時，即為判斷當前時間是否在8:00-23:00之間 
 */  
- (BOOL)isBetweenFromHour:(NSInteger)fromHour toHour:(NSInteger)toHour {  
      
    NSDate *dateFrom = [self getCustomDateWithHour:fromHour];  
    NSDate *dateTo = [self getCustomDateWithHour:toHour];  
      
    NSDate *currentDate = [NSDate date];  
    if ([currentDate compare:dateFrom]==NSOrderedDescending && [currentDate compare:dateTo]==NSOrderedAscending) {  
        // 當前時間在9點和10點之間  
        return YES;  
    }  
    return NO;  
}  
  
/** 
 * @brief 生成當天的某個點（返回的是倫敦時間，可直接與當前時間[NSDate date]比較） 
 * @param hour 如hour為“8”，就是上午8:00（本地時間） 
 */  
- (NSDate *)getCustomDateWithHour:(NSInteger)hour {  
    //獲取當前時間  
    NSDate *currentDate = [NSDate date];  
    NSCalendar *currentCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];  
    NSDateComponents *currentComps = [[NSDateComponents alloc] init];  
      
    NSInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSWeekdayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;  
      
    currentComps = [currentCalendar components:unitFlags fromDate:currentDate];  
      
    //設置當天的某個點  
    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:NSGregorianCalendar];  
    return [resultCalendar dateFromComponents:resultComps];  
}