1. 程式人生 > >[iOS]判斷當前時間是否在指定的時間段內

[iOS]判斷當前時間是否在指定的時間段內

一、問題描述

應用需要,判斷當前時間是否在指定的時間段內,從而進行不同的操作

二、問題解決

用NSDateComponents、NSCalendar確定倆固定的NSDate格式的時間,然後再進行比較

/**
 * @brief 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 FromMinute:(NSInteger)fromMin toHour:(NSInteger)toHour toMinute:(NSInteger)toMin
{
    NSDate *date8 = [self getCustomDateWithHour:8 andMinute:fromMin];
    NSDate *date23 = [self getCustomDateWithHour:23 andMinute:toMin];
    
    NSDate *currentDate = [NSDate date];
    
    if ([currentDate compare:date8]==NSOrderedDescending && [currentDate compare:date23]==NSOrderedAscending)
    {
        NSLog(@"該時間在 %d:%d-%d:%d 之間!", fromHour, fromMin, toHour, toMin);
        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 andMinute:(NSInteger)minute
{
    //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];
    
    //設定當天的某個點
    NSDateComponents *resultComps = [[NSDateComponents alloc] init];
    [resultComps setYear:[currentComps year]];
    [resultComps setMonth:[currentComps month]];
    [resultComps setDay:[currentComps day]];
    [resultComps setHour:hour];
    [resultComps setMinute:minute];
    
    NSCalendar *resultCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    return [resultCalendar dateFromComponents:resultComps];
}