How to get accuracy days completed - ios

Question

How to get accuracy days completed?
- (CGFloat)accuracyDaysCompleted:(NSString *)startDate and:(NSString *)endDate {
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd"];
NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDateComponents *components = [gregorianCalendar components:NSCalendarUnitDay
fromDate:[dateFormatter dateFromString:startDate]
toDate:[dateFormatter dateFromString:endDate]
options:0];
return (CGFloat)components.day;
}
Example
The work is completed 3 days 12 hours 30Min
Expected result 3.55 Days.

Answer 1

The following example shows the days difference from the given date and today.
This might guide you to convert seconds, minutes, hours to days.
-(NSString*)timeDifferenceConversion:(NSString*)dateString
{
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"]];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate* firstDate = [dateFormatter dateFromString:dateString];
NSDate * now = [NSDate date];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSString *newDateString = [dateFormatter stringFromDate:now];
NSDate* secondDate = [dateFormatter dateFromString:newDateString];
NSTimeInterval timeDifference = [secondDate timeIntervalSinceDate:firstDate];
NSInteger ti = (NSInteger)timeDifference;
NSInteger minutes = (ti / 60) % 60;
NSInteger hours = (ti / 3600);
NSInteger days = (ti / 86400);
NSString* temp=#"";
if(minutes<=2 && hours<1 && days<1)
{
temp=#"now";
}
else if(minutes>2 && hours<1 && days<1)
{
temp=[NSString stringWithFormat:#"%ld minutes ago", (long)minutes];
}
else if(hours<=24 && days<1)
{
temp=[NSString stringWithFormat:#"%ld hours ago", (long)hours];
}
else if(days<=1)
{
temp=[NSString stringWithFormat:#"%ld day ago",(long)days];
}
else if(days>1)
{
temp=[NSString stringWithFormat:#"%ld days ago",(long)days];
}
return temp;
}

Answer 2

I suggest you calculate the difference in seconds between the two dates, then simply divide the result by the number of seconds in one day :
- (CGFloat)accuracyDaysCompleted:(NSString *)startDate and:(NSString *)endDate {
NSDate *date1 = [NSDate dateWithString: startDate];
NSDate *date2 = [NSDate dateWithString: endDate];
NSTimeInterval secondsBetween = [date2 timeIntervalSinceDate:date1];
return secondsBetween / 86400.0f;
}