iOS date to today yesterday form

Recent projects have similar QQ space display dynamic UI, imitation of the QQ space time display, in this record, for review.

This is the UI for QQ space:

The time is displayed as:

1. Today--Today xx:xx ( today 15:39)

2. Yesterday-Yesterday xx:xx ( yesterday)

3. Day before yesterday Xx:xx ( 19:00day before yesterday)

4. Same year, for example: January 3-->01-03 xx:xx (01-03 12:29) of the same year

5. Not in the same year-xxxx-xx-xx (2014-12-12)

The program works as follows, with the following simple tests, no UI interface:

The code below is changed on the basis of the existing code on the Web, the original code point this view

/** * Imitation QQ space Time display * @param string eg:2015 May 24 02:21 30 seconds */-(NSString *) format: (NSString *) string{nsdateformatter *i    nputformatter= [[NSDateFormatter alloc] init];    [Inputformatter Setlocale:[[nslocale alloc] initwithlocaleidentifier:@ "en_US"];    [Inputformatter setdateformat:@ "yyyy years mm DD Day hh mm min ss seconds"];    Nsdate*inputdate = [Inputformatter datefromstring:string];        NSLog (@ "startdate=%@", inputdate);    NSDateFormatter *outputformatter= [[NSDateFormatter alloc] init];    [Outputformatter Setlocale:[nslocale Currentlocale];    [Outputformatter setdateformat:@ "Yyyy-mm-dd HH:mm:ss"];    Get date str nsstring *str= [Outputformatter stringfromdate:inputdate];    Str to nsdate nsdate *strdate = [Outputformatter datefromstring:str];    Fixed 8-hour difference when nstimezone *zone = [Nstimezone systemtimezone];    Nsinteger interval = [zone secondsfromgmtfordate:strdate];    NSDate *enddate = [Strdate datebyaddingtimeinterval:interval];    NSLog (@ "enddate:%@", endDate); NsString *lasttime = [self comparedate:enddate];    NSLog (@ "lasttime =%@", lasttime); return str;}        -(NSString *) Comparedate: (NSDate *) date{nstimeinterval secondsperday = 24 * 60 * 60;    Fixed 8-hour difference nsdate *date1 = [NSDate Date];    Nstimezone *zone = [Nstimezone systemtimezone];    Nsinteger interval = [zone secondsfromgmtfordate:date1];        NSDate *localedate = [Date1 datebyaddingtimeinterval:interval];    NSLog (@ "nowdate=%@\nolddate =%@", localedate,date);    NSDate *today = localedate;    NSDate *yesterday,*beforeofyesterday;        This year nsstring *toyears;        Toyears = [[Today description] substringtoindex:4];    Yesterday = [Today datebyaddingtimeinterval:-secondsperday];        Beforeofyesterday = [Yesterday Datebyaddingtimeinterval:-secondsperday]; Ten first characters of description is the calendar date:nsstring *todaystring = [[Today description] Substringtoind    EX:10]; NSString *yesterdaystring = [[Yesterday description] SubstringtoindeX:10];        NSString *beforeofyesterdaystring = [[beforeofyesterday description] substringtoindex:10];    NSString *datestring = [[date description] substringtoindex:10];        NSString *dateyears = [[date description] substringtoindex:4];    NSString *datecontent; if ([Dateyears Isequaltostring:toyears]) {///the same year//the time of the day before yesterday nsstring *time = [[Date description] Substringwi        Thrange: (nsrange) {11,5}];        Other time NSString *time2 = [[Date description] Substringwithrange: (nsrange) {5,11}];            if ([datestring isequaltostring:todaystring]) {datecontent = [NSString stringwithformat:@ "Today%@", time];        return datecontent; } else if ([datestring isequaltostring:yesterdaystring]) {datecontent = [NSString stringwithformat:@ "Yesterday%@", Tim            E];        return datecontent; }else if ([datestring isequaltostring:beforeofyesterdaystring]) {datecontent = [NSString stringwithformat:@] the day before yesterday            %@ ", Time]; Return Datecontent        }else{return time2;    }}else{return datestring; }}

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

iOS date to today yesterday form