- (void)viewDidLoad {    [super viewDidLoad];        NSDateComponents *fromDateComponents = [[NSDateComponents alloc]init];    NSDateComponents *toDateComponents = [[NSDateComponents alloc]init];    [fromDateComponents setHour:6];        // 开始时间-小时    [toDateComponents setHour:18];         // 结束时间-小时    [toDateComponents setMinute:58];       // 结束时间-分钟            [self isBetweenFromDateComponents:fromDateComponents toComponents:toDateComponents];    }/** *  转化为系统当前地区时间 * *  @param date 系统时间 * *  @return 系统当前地区时间 */- (NSDate *)convertSystemLocationDate:(NSDate *)date{    NSTimeZone *zone = [NSTimeZone systemTimeZone];    NSTimeInterval interval = [zone secondsFromGMTForDate:date];    return [date dateByAddingTimeInterval:interval];}/** *  获取当前时间是否在设置的某一个时间段内 * *  @param fromComponents 开始时间 *  @param toComponents   结束时间 * *  @return BOOL */- (BOOL)isBetweenFromDateComponents:(NSDateComponents*)fromComponents toComponents:(NSDateComponents *)toComponents{    NSDate *fromDate = [self getCustomDateeWithDateComponents:fromComponents];    NSDate *toDate = [self getCustomDateeWithDateComponents:toComponents];    // 获取当前时间    NSDate *currDate = [NSDate date];    if ([[self convertSystemLocationDate:currDate] compare:fromDate]== NSOrderedDescending && [[self convertSystemLocationDate:currDate] compare:toDate] == NSOrderedAscending)    {        return YES;    }    return NO;}/** *  根据设置的时间返回一个NSDate类型的时间 * *  @param dateComponents NSDateComponents * *  @return NSDate */- (NSDate *)getCustomDateeWithDateComponents:(NSDateComponents *)dateComponents{    //获取当前时间    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];        //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:[dateComponents hour]];    [resultComps setMinute:[dateComponents minute]];        NSCalendar *resultCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];    NSDate *resultDate = [self convertSystemLocationDate:[resultCalendar dateFromComponents:resultComps]];        return resultDate;}