iOS - 判断当前时间是否在某个时间段

if ([self isBetweenFromHour:9 toHour:10]) {
}

/**
* @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];
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: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:hour];

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