iOS 时间戳和时间互换,计算两日期相隔天数

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/*

 *获取当前系统时间的时间戳

 */

+(NSInteger)getNowTimestamp;

 

/**

 * 获取当前时间

 */

+ (NSString *)getNowTimeTampFormat:(NSString *)tampFormat;

/*

 *时间戳转时间

 *format (@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

 */

+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format;

    

/*

 *时间戳转时间(时间的前一天)

 *format (@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

 */

+(NSString *)timestampSwitchlastTime:(NSInteger)timestamp andFormatter:(NSString *)format;

 

 

/*

 *时间戳转时间

 *formatTime 时间字符串

 *format (@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

 */

+ (NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format;

/*

 *某日和当前日期相隔多少天

 */

+ (NSInteger)getDifferenceByDate:(NSString *)date;

 

/**

 *日期格式请传入：2013-08-05 12:12:12；如果修改日期格式，比如：2013-08-05，则将[df setDateFormat:@"yyyy-MM-dd HH:mm:ss"];修改为[df setDateFormat:@"yyyy-MM-dd"];

 */

+(int)compareDate:(NSString*)date01 withDate:(NSString*)date02;

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+(NSInteger)getNowTimestamp{

    

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    

    [formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"]; // ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

    

    //设置时区,这个对于时间的处理有时很重要

    

    NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

    

    [formatter setTimeZone:timeZone];

    

    NSDate *datenow = [NSDate date];//现在时间

    

//    NSLog(@"设备当前的时间:%@",[formatter stringFromDate:datenow]);

    

    //时间转时间戳的方法:

    

    NSInteger timeSp = [[NSNumber numberWithDouble:[datenow timeIntervalSince1970]] integerValue];

    

//    NSLog(@"设备当前的时间戳:%ld",(long)timeSp); //时间戳的值

    

    return timeSp;

    

}

+ (NSString *)getNowTimeTampFormat:(NSString *)tampFormat {

 

    NSDate *date = [NSDate date];

    

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    

    [formatter setDateFormat:tampFormat];

    NSString *DateTime = [formatter stringFromDate:date];

    

    return DateTime;

}

 

//将某个时间戳转化成 时间

 

#pragma mark - 将某个时间戳转化成 时间

 

+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format {

    

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    

    [formatter setDateFormat:format];

    NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

    

    [formatter setTimeZone:timeZone];

    //十三位时间戳转时间需要/1000 十位时间戳你不需要

    NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp / 1000];

    

    

    NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];

    

//    NSLog(@"&&&&&&&confromTimespStr = : %@",confromTimespStr);

    

    return confromTimespStr;

    

}

 

/*

 *时间戳转时间(时间的前一天)

 *format (@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

 */

+(NSString *)timestampSwitchlastTime:(NSInteger)timestamp andFormatter:(NSString *)format {

 

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    

    [formatter setDateFormat:format];

    NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

    

    [formatter setTimeZone:timeZone];

    //十三位时间戳转时间需要/1000 十位时间戳你不需要

    NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp / 1000];

    

    NSDate *lastDay = [NSDate dateWithTimeInterval:(-24*60*60)*2 sinceDate:confromTimesp];//前两天

    

    NSString *confromTimespStr = [formatter stringFromDate:lastDay];

 

    return confromTimespStr;

 

}

 

//将某个时间转化成 时间戳

 

#pragma mark - 将某个时间转化成 时间戳

 

+ (NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format{

    

    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

    

    [formatter setDateStyle:NSDateFormatterMediumStyle];

    

    [formatter setTimeStyle:NSDateFormatterShortStyle];

    

    [formatter setDateFormat:format];     

    NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

    

    [formatter setTimeZone:timeZone];

    

    

    NSDate* date = [formatter dateFromString:formatTime]; //------------将字符串按formatter转成nsdate

    

    //时间转时间戳的方法:

    

    NSInteger timeSp = [[NSNumber numberWithDouble:[date timeIntervalSince1970]] integerValue];

    

//    NSLog(@"将某个时间转化成 时间戳&&&&&&&timeSp:%ld",(long)timeSp); //时间戳的值

    

    return timeSp;

}

 

+ (NSInteger)getDifferenceByDate:(NSString *)date {

    //获得当前时间

//    NSDate *now = [NSDate date];

//    //实例化一个NSDateFormatter对象

//    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

//    //设定时间格式

//    [dateFormatter setDateFormat:@"YYYY-MM-dd"];

//    NSDate *oldDate = [dateFormatter dateFromString:date];

//    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

//    unsigned int unitFlags = NSDayCalendarUnit;

//    NSDateComponents *comps = [gregorian components:unitFlags fromDate:oldDate  toDate:now  options:0];

//    return [comps day];

//

    //下面这种方法从00:00:00开始计算

#pragma clang diagnostic push

#pragma clang diagnostic ignored "-Wdeprecated-declarations"

    NSCalendar *gregorian = [[NSCalendar alloc]

                             initWithCalendarIdentifier:NSGregorianCalendar];

    [gregorian setFirstWeekday:2];

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

    [dateFormatter setDateFormat:@"YYYY-MM-dd"];

    NSDate *fromDate;

    NSDate *toDate;

    [gregorian rangeOfUnit:NSDayCalendarUnit startDate:&fromDate interval:NULL forDate:[dateFormatter dateFromString:date]];

    [gregorian rangeOfUnit:NSDayCalendarUnit startDate:&toDate interval:NULL forDate:[NSDate date]];

    NSDateComponents *dayComponents = [gregorian components:NSDayCalendarUnit fromDate:fromDate toDate:toDate options:0];

#pragma clang diagnostic pop

 

    return [dayComponents day];

}

 

 

+(int)compareDate:(NSString*)date01 withDate:(NSString*)date02 {

    int ci;

    NSDateFormatter *df = [[NSDateFormatter alloc] init];

    [df setDateFormat:@"yyyy-MM-dd"];

    NSDate *dt1 = [[NSDate alloc] init];

    NSDate *dt2 = [[NSDate alloc] init];

    dt1 = [df dateFromString:date01];

    dt2 = [df dateFromString:date02];

    NSComparisonResult result = [dt1 compare:dt2];

    switch (result) {

            //date02比date01大

        case NSOrderedAscending: ci=1; break;

            //date02比date01小

        case NSOrderedDescending: ci=-1; break;

            //date02=date01

        case NSOrderedSame: ci=0; break;

        default: NSLog(@"erorr dates %@, %@", dt2, dt1); break;

    }

    return ci;

}

iOS 时间戳和时间互换,计算两日期相隔天数的相关教程结束。