[IOS] Time filter < week, week, earlier >

1, can achieve time screening, visual should have more simple method.

Idea: Get the day time, and the target time to perform the action.

Note: Time zone time zone the time zone important time zone is said three times.

-(void) viewdidload {[Super viewdidload];        NSDate * today = [NSDate Date];    Define the current timezone time nsstring * times [email protected] "2015-08-16 00:00:00";        nsdate* xmlData = [self datefromstring:time];        XmlData = [self getnowdatefromatandate:xmldata];    if ([self intervalsincenow:xmldata]>=[self gettodayisweek:today]+7) {NSLog (@ "This date is long ago"); } if ([Self intervalsincenow:xmldata]>=[self gettodayisweek:today]&&[self intervalsincenow:xmldata]<[    Self gettodayisweek:today]+7) {NSLog (@ "This date is last week");    } if ([Self intervalsincenow:xmldata]<7&&[self intervalsincenow:xmldata]<[self getTodayisWeek:today])    {NSLog (@ "This date is this week");        }}-(int) Intervalsincenow: (NSDate *) thedate{nstimeinterval late=[thedate timeintervalsince1970]*1;    nsdate* dat = [nsdate datewithtimeintervalsincenow:0];    dat= [self getnowdatefromatandate:dat];    Nstimeinterval Now=[dat timeintervalsince1970]*1; NSString *[Email protected] "";        Nstimeinterval cha=now-late;        if (cha/86400>1) {timestring = [nsstring stringwithformat:@ "%f", cha/86400];        TimeString = [TimeString substringtoindex:timestring.length-7];    return [TimeString Intvalue];   } return-1; }-(NSDate *) Getnowdatefromatandate: (NSDate *) anydate{//Set source date time zone nstimezone* sourcetimezone = [Nstimezone timeZoneWi    thabbreviation:@ "UTC"];//or GMT//set the converted target date time zone nstimezone* destinationtimezone = [Nstimezone localtimezone];    Get the offset of the source date and world standard Time Nsinteger sourcegmtoffset = [Sourcetimezone secondsfromgmtfordate:anydate];    The offset of the target date from the local time zone nsinteger destinationgmtoffset = [destinationTimeZone secondsfromgmtfordate:anydate];    Get the difference of time offset nstimeinterval interval = Destinationgmtoffset-sourcegmtoffset;    Convert to present time nsdate* destinationdatenow = [[NSDate alloc] Initwithtimeinterval:interval sincedate:anydate]; return destinationdatenow;} -(NSDate *) datefromstring: (NSString *) Datestring{NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];         [Dateformatter Setdateformat: @ "Yyyy-mm-dd HH:mm:ss"];         NSDate *destdate= [Dateformatter datefromstring:datestring];    return destdate;    }//gets the day of the week-(int) Gettodayisweek: (NSDate *) today{today = [self getnowdatefromatandate:today];    Nscalendar*calendar = [Nscalendar Currentcalendar];    Nsdatecomponents*comps;    [Comps setweekday:0];    Comps =[calendar components: (nscalendarunitweekday) fromdate:today]; Nsinteger weekday = [comps weekday]; Day of the week (note that Sunday is "1", Monday is "2" ....    ) int factweekday;            Default is Sunday start switch (weekday) {Case 1:factweekday = 7;        Break            Case 2:factweekday = 1;        Break            Case 3:factweekday = 2;        Break            Case 4:factweekday = 3;        Break            Case 5:factweekday = 4;        Break   Case 6:factweekday = 5;         Break            Case 7:factweekday = 6;        Break    Default:break; } return factweekday;}

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[IOS] Time filter < week, week, earlier >