Objective-C 時間操作實用方法總結

標籤：objective-c   時間格式化   unix時間戳記   

Objective-C 時間操作實用方法總結

根據月頭擷取月尾日期

/** *  GetMonthEndDate *  根據月頭擷取月尾日期 * *  @param monthBegin 月頭(yyyy-MM-dd HH:mm:ss) * *  @return NSDate / nil */+(NSDate *) GetMonthEndDate:(NSString *)monthBegin{    if (![monthBegin isEqualToString:@""]){        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];        [formatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC+8"]];        [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];        NSDateComponents *currentMonth = [[NSDateComponents alloc] init];        currentMonth.month = 1;         NSDate *end = [[NSCalendar currentCalendar] dateByAddingComponents:currentMonth toDate:[formatter dateFromString:monthBegin] options:0];        return end;    }else return nil;}

根據日期擷取星期

/** *  GetWeekForDate *  根據日期擷取星期 * *  @param NSString strDate 日期(yyyy-MM-dd) * *  @return NSString / empty */+(NSString*) GetWeekForDate:(NSString *) strDate{    if (![strDate isEqualToString:@""]) {        //時間格式化        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];        //擷取對應時間        [formatter setDateFormat:@"yyyy-MM-dd"];        NSDate *cdate = [formatter dateFromString:strDate];        //擷取時間資訊        [formatter setDateFormat:@"yyyy-MM-dd EEEE HH:mm:ss a"];        NSString *locationString=[formatter stringFromDate: cdate];        NSArray *arrDate = [locationString componentsSeparatedByString:@" "];        NSString *strWeek = [NSString stringWithFormat:@"%@",[arrDate objectAtIndex:1]];        if ([strWeek isEqualToString:@"Sunday"])        return @"周末";        else if ([strWeek isEqualToString:@"Monday"])   return @"周一";        else if ([strWeek isEqualToString:@"Tuesday"])  return @"周二";        else if ([strWeek isEqualToString:@"Wednesday"])return @"周三";        else if ([strWeek isEqualToString:@"Thursday"]) return @"周四";        else if ([strWeek isEqualToString:@"Friday"])   return @"周五";        else if ([strWeek isEqualToString:@"Saturday"]) return @"周六";        else return @"";    }else return nil;}

根據目前時間擷取 unix時間戳記

    //擷取時間戳記    NSDate *datetime = [NSDate date];    NSTimeZone *zone = [NSTimeZone timeZoneForSecondsFromGMT:8];    NSInteger interval = [zone secondsFromGMTForDate:datetime];    NSDate *localeDate = [datetime  dateByAddingTimeInterval: interval];    NSString *unixtime = [NSString stringWithFormat:@"%.f", floor([localeDate timeIntervalSince1970])];

如下文章為本文提供了相當大的協助，表示感謝：

http://book.2cto.com/201304/21439.html

http://blog.sina.com.cn/s/blog_4e24d9c501010lu2.html

Objective-C 時間操作實用方法總結