关于日期的相关处理

作者: JoliLove | 来源:发表于2018-09-02 19:45 被阅读65次

关于日期的相关处理
SQL中关于处理日期相关的问题
MySQL: 日期相关处理
java 日期处理相关
java日期相关处理
swift 日期的相关处理
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iOS 日期处理的相关类
ios关于日期处理
关于日期的各种处理

获取某一日期的时间戳

+ (NSTimeInterval)getTimeIntervalWithDateStr:(NSString *)dateString
{
    NSDate *tempDate = [self getDateFromString:dateString formatterStr:@"YYYY-MM-dd HH:mm:ss"];
    NSTimeInterval timeInterval = (long)[tempDate timeIntervalSince1970];
    return timeInterval;
}

获取当前时间(YYYY-MM-dd hh:mm:ss )

+ (NSString *)currentDateStr
{
    NSDate *currentDate = [NSDate date];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
    NSString *dateString = [dateFormatter stringFromDate:currentDate];
    return dateString;
}

获取当前时间(YYYY-MM-dd hh:mm:ss )

+ (NSDate *)getCurrentDate
{
    NSDate *data = [NSDate dateWithTimeIntervalSinceNow:0];
    return data;
}

8601国际标准时间字符串(yyyy-MM-dd'T'HH:mm:ss)转化成NsDate(yyyy-MM-dd HH:mm:ss)

+ (NSDate *)getDateFromISOString:(NSString *)dateStr
{
    NSDateFormatter *formatter = [self setDateFormatterWithString:@"yyyy-MM-dd'T'HH:mm:ss"];
    NSLocale *posix = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
    [formatter setLocale:posix];
    
    NSDate *date = [formatter dateFromString:dateStr];
    
    return date;
}

计算两个日期之间的时间戳
inBegin与inEnd 时间顺序为 inBegin ---> inEnd 是正值, 顺序为inEnd ---> inBegin 是负值)

+ (NSInteger)calcIntervalFromBegin:(NSDate *)inBegin end:(NSDate *)inEnd
{
    NSTimeInterval interval = [inEnd timeIntervalSinceDate:inBegin];
    
    return (NSInteger)interval;
}

计算两个日期之间的天数

+ (NSInteger)calcDaysFromBegin:(NSDate *)inBegin end:(NSDate *)inEnd
{
    NSInteger unitFlags = NSCalendarUnitDay| NSCalendarUnitMonth | NSCalendarUnitYear;
    
    NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSDateComponents *comps = [cal components:unitFlags fromDate:inBegin];
    NSDate *newBegin  = [cal dateFromComponents:comps];
    
    NSDateComponents *comps2 = [cal components:unitFlags fromDate:inEnd];
    NSDate *newEnd  = [cal dateFromComponents:comps2];
    
    NSDateComponents *dayComponents = [cal components:unitFlags fromDate:newBegin toDate:newEnd options:0];
    
    return [dayComponents day];
}

获得 n个月后的日期

+ (NSDate *)getPriousorLaterDateFromDate:(NSDate *)date withMonth:(int)month

{
    NSDateComponents *comps = [[NSDateComponents alloc] init];
    
    [comps setMonth:month];
    
    NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    
    NSDate *mDate = [calender dateByAddingComponents:comps toDate:date options:0];
    
    return mDate;
}

获得 n天后的日期

+ (NSDate *)getDayLaterDateFromDate:(NSDate *)date withDay:(int)day

{
    NSDateComponents *comps = [[NSDateComponents alloc] init];
    
    [comps setDay:day];
    
    NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    
    NSDate *mDate = [calender dateByAddingComponents:comps toDate:date options:0];
    
    return mDate;
}

+ (NSString *)getDayLaterDateFromDateStr:(NSString *)dateStr withDay:(int)day

{
    NSDate *date = [self getDateFromString:dateStr formatterStr:@"yyyy-MM-dd HH:mm:ss"];
    
    NSDateComponents *comps = [[NSDateComponents alloc] init];
    
    [comps setDay:day];
    
    NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    
    
    NSDate *mDate = [calender dateByAddingComponents:comps toDate:date options:0];
    
    NSString *mDateStr = [self getStringFromDate:mDate formatterStr:@"yyyy-MM-dd HH:mm:ss"];
    
    return mDateStr;
}

获取日期的年份

+ (NSInteger)getYearFrameDate:(NSDate *)date
{
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSUInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:date];
    
    NSInteger year = [dateComponent year];

    return year;
}

获取日期的月份

+ (NSInteger)getMonthFrameDate:(NSDate *)date
{
    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSUInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:date];
    
    NSInteger month = [dateComponent month];
    
    return month;
}

获取日期是一周中的周几

+ (NSString *)weekDayStringFromDate:(NSDate *)date
{
    NSArray *weekdays = [NSArray arrayWithObjects:@"",@"周日",@"周一",@"周二",@"周三",@"周四",@"周五",@"周六", nil];
    
    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    
    
    NSTimeZone *timeZone = [[NSTimeZone alloc] initWithName:@"Asia/Shanghai"];
    
    [calendar setTimeZone:timeZone];
    
    NSCalendarUnit calendarUnit = NSCalendarUnitWeekday;
    
    NSDateComponents *theComponents = [calendar components:calendarUnit fromDate:date];
    
    NSString *weekDay = [weekdays objectAtIndex:theComponents.weekday];
    
    return weekDay;
}

判断某一日期(date)是否为今年

+ (BOOL)isThisYear:(NSDate *)date
{
    NSCalendar *calendar = [NSCalendar currentCalendar];
    
    int unit = NSCalendarUnitYear;
    
    NSDateComponents *nowCmps = [calendar components:unit fromDate:[NSDate date]];
    
    NSDateComponents *selfCmps = [calendar components:unit fromDate:date];
    
    return nowCmps.year == selfCmps.year;
}

将时间戳转换为格式化后的字符串 (刚刚几分钟前几小时前几天以前...)

+ (NSString *)timeBeforeInfoWithString:(NSString *)dateString
{
    NSDate *date = [self getDateFromString:dateString formatterStr:@"YYYY-MM-dd HH:mm:ss"];
    
   // 先 计算时间差
    /*
    //方法1. 时间戳 计算 时间差
    NSTimeInterval timeInt = [self calcIntervalFromBegin:date end:[self getCurrentDate]];

    int year = timeInt / (3600 * 24 * 30 *12);
    int month = timeInt / (3600 * 24 * 30);
    int day = timeInt / (3600 * 24);
    int hour = timeInt / 3600;
    int minute = timeInt / 60;
    int second = timeInt;
     */
    
    // 方法2. NSDateComponents 计算时间差
    NSInteger unitFlags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
    NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    
    NSDateComponents *dayComponents = [cal components:unitFlags fromDate:date toDate:[self getCurrentDate] options:0];
    
    NSInteger year = dayComponents.year;
    NSInteger month = dayComponents.month;
    NSInteger day = dayComponents.day;
    NSInteger hour = dayComponents.hour;
    NSInteger minute = dayComponents.minute;
    NSInteger second = dayComponents.second;

    if (year > 0) {
        return [NSString stringWithFormat:@"%ld年以前",year];
    }else if(month > 0){
        return [NSString stringWithFormat:@"%ld个月以前",month];
    }else if(day > 0){
        return [NSString stringWithFormat:@"%ld天以前",day];
    }else if(hour > 0){
        return [NSString stringWithFormat:@"%ld小时以前",hour];
    }else if(minute > 0){
        return [NSString stringWithFormat:@"%ld分钟以前",minute];
    }else{
        return [NSString stringWithFormat:@"刚刚"];
    }
}

NSDate转化成日期字符串(yyyy-MM-dd HH:mm:ss)

+ (NSString *)getStringFromDate:(NSDate *)date formatterStr:(NSString *)formatterStr
{
    NSDateFormatter *formatter = [self setDateFormatterWithString:formatterStr];
    
    NSString *dateStr = [formatter stringFromDate:date];
    return dateStr;
}

日期字符串转化成NSDate(yyyy-MM-dd HH:mm:ss)

+ (NSDate *)getDateFromString:(NSString *)dateStr formatterStr:(NSString *)formatterStr
{
    NSDateFormatter *formatter = [self setDateFormatterWithString:formatterStr];
    
    NSDate *date = [formatter dateFromString:dateStr];
    return date;
}

格式化日期 yyyy-MM-dd HH:mm:ss

+ (NSDate *)dateWithFormat:(NSDate *)date
{
    NSDateFormatter *formatter = [self setDateFormatterWithString:@"yyyy-MM-dd HH:mm:ss"];
    NSString *selfStr = [formatter stringFromDate:date];
    return [formatter dateFromString:selfStr];
}

设置日期格式

+ (NSDateFormatter *)setDateFormatterWithString:(NSString *)dateFormatter
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:dateFormatter];
    return formatter;
}

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