separate future date in nsmutablearray - ios

Question

I am having a mutable array in that array i am having only past date, current date & future date. I have to separate the future date & store into another array. Can you help me.
This is my array:
uniqueItems(
"2015-03-01",
"2015-02-28",
"2015-02-22",
"2015-02-21",
"2015-02-20",
"2015-02-15",
"2015-02-14",
"2015-02-13",
"2015-02-08",
"2015-02-07",
"2015-02-01",
"2015-01-31",
"2015-01-30",
"2015-01-25",
"2015-01-24",
"2015-01-18",
"2015-01-17",
"2015-01-16",
"2015-01-11",
"2015-01-10",
"2014-12-07"
I have tried this coding, but is not working.
NSDate *currentDate = [NSDate date];
NSDate* dateAdded=(NSDate*)[uniqueItems objectAtIndex:0];
double min = [currentDate timeIntervalSinceDate:dateAdded];
int minIndex = 0;
for (int i = 1; i < [uniqueItems count]; ++i)
{
double currentmin = [currentDate timeIntervalSinceDate:[uniqueItems objectAtIndex:i]];
if (currentmin < min) {
min = currentmin;
minIndex = i;}}

Answer 1

you can use NSPredicate block for that. your array does not contain NSDate objects so we need to convert it into NSDate and then compare with [NSDate date]
NSPredicate *findFutureDates = [NSPredicate predicateWithBlock: ^BOOL(id obj, NSDictionary *bind){
NSDateFormatter *df = [[NSDateFormatter alloc]init];
[df setDateFormat:#"yyyy-MM-dd"];
[df setTimeZone:[NSTimeZone systemTimeZone]];
NSDate *dd = [df dateFromString:(NSString *)obj ];
return ([[NSDate date] compare:dd] == NSOrderedAscending);
}];
NSArray *arrFutureDates = [yourArray filteredArrayUsingPredicate: findFutureDates];
NSLog(#"%#",arrFutureDates);
if you pass NSOrderedAscending will give you future dates if you pass NSOrderedDescending will give you past dates.

Answer 2

NSDate *currentDate = [NSDate date];
NSDate *date;
int offset = 0;
NSMutableArray *futureArray = [[NSMutableArray alloc] init];
for (int i = 1; i < [uniqueItems count]; ++i)
{
date = [uniqueItems objectAtIndex:i];//TODO: Convert to NSDate
offset = [currentDate timeIntervalSinceDate:date];
if (offset < 0) {
[futureArray addObject:[uniqueItems objectAtIndex:i]];
}
}
This is a idea. Sorry, I'm coding in notepad without test.

Answer 3

Your array is of string format not an NSDate object. You can convert a string to nsdate
NSString *dateString = #"2010-02-13";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd"];
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString:dateString];
and then you could do your check.