How long is two days apart?

NSDate *now = [NSDate Date];

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

@ "Yyyy-mm-dd HH:mm:ss EEE Z" date and time zone difference Mon +0800

@ "yyyy mm month DD day hh" mm min ss sec "

Fmt.dateformat = @ "Yyyy-mm-dd HH:mm:ss";

NSString *nowstring = [FMT Stringfromdate:now];

NSLog (@ "%@", nowstring);

The format of the #warning string must be the same as the DateFormat format

@ "October 15, 2015 12:20 32 seconds"

NSString *s = @ "2013-1-15 12:20:32";

NSDate *lastdate = [FMT datefromstring:s];

NSLog (@ "%@", lastdate);

NSString *lasts = [FMT stringfromdate:lastdate];

NSLog (@ "%@", lasts);

Nscalendar *calendar = [Nscalendar Currentcalendar];

Nscalendarunit unit = Nscalendarunityear | Nscalendarunitmonth | Nscalendarunitday | Nscalendarunithour | Nscalendarunitminute | Nscalendarunitsecond;

Time difference Component

nsdatecomponents *components = [Calendar components:unit fromdate:lastdate todate:now options: Nscalendarwrapcomponents];

NSLog (@ "%ld%ld", Components.year, Components.month);

NSString *timespace;

if (Components.year > 0) {

Timespace = [NSString stringwithformat:@ "%ld%ld months%ld days ago", Components.year, Components.month, Components.day];

} else {

if (Components.month > 0) {

Timespace = [NSString stringwithformat:@ "%ld months ago", Components.month];

} else {

if (Components.day > 0) {

Timespace = [NSString stringwithformat:@ "%ld days Ago", Components.day];

}

}

}

NSLog (@ "%@", timespace);

How long is two days apart?