PHFetchOptions predicate with NSDate compare - ios

Question

Hello I had been working with Photos.framework but now I am stuck with predicate comparison of PHFetchOptions class in documents I see that we can use startDate to use in predicate. So my code is this
#interface ViewController ()
{
NSMutableArray * moments;
}
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
moments = [NSMutableArray array];
if([PHPhotoLibrary authorizationStatus] == PHAuthorizationStatusNotDetermined)
{
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
[self loadCollections];
}];
}else
{
[self loadCollections];
}
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self loadCollections];
}
- (NSDate*)dateAddingDays:(NSInteger)days ToDate:(NSDate*)argDate
{
NSCalendar * gregorian = [NSCalendar currentCalendar];
NSDateFormatter * formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:#"dd.MM.yyyy"];
NSString * dateString = [formatter stringFromDate:argDate];
NSDate * toWorkDate = [formatter dateFromString:dateString];
NSDateComponents *comps = [[NSDateComponents alloc] init];
[comps setDay:days];
NSDate *date = [gregorian dateByAddingComponents:comps toDate:toWorkDate options:0];
NSLog(#"%#",[formatter stringFromDate:date]);
return date;
}
- (void)loadCollections
{
PHFetchOptions * options = [[PHFetchOptions alloc]init];
options.predicate = [NSComparisonPredicate predicateWithFormat:#"startDate > CAST(%d,\"NSDate\")",[self dateAddingDays2:-1 ToDate:[NSDate date]].timeIntervalSince1970];
PHFetchResult * result = [PHAssetCollection fetchMomentsWithOptions:options];
if(result != nil)
{
NSLog(#"%i",result.count);
for (int i = 0; i < result.count; i++) {
NSLog(#"%#",[result objectAtIndex:i]);
[moments addObject:[result objectAtIndex:i]];
}
}
}
So my problem is this, I need fetch fotos from one day ago, I can make this work!! any help will be appreciated.

Answer 1

This is the answer, basically I replaced
- (NSDate*)dateAddingDays:(NSInteger)days ToDate:(NSDate*)argDate
{
NSCalendar * gregorian = [NSCalendar currentCalendar];
NSDateFormatter * formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:#"dd.MM.yyyy"];
NSString * dateString = [formatter stringFromDate:argDate];
NSDate * toWorkDate = [formatter dateFromString:dateString];
NSDateComponents *comps = [[NSDateComponents alloc] init];
[comps setDay:days];
NSDate *date = [gregorian dateByAddingComponents:comps toDate:toWorkDate options:0];
NSLog(#"%#",[formatter stringFromDate:date]);
return date;
}
by
- (NSDate*)yesterday
{
NSCalendar * gregorian = [NSCalendar currentCalendar];
return [gregorian startOfDayForDate:[gregorian dateByAddingUnit:NSCalendarUnitDay value:-1 toDate:[NSDate date] options:NSCalendarWrapComponents]];
}
and also replace this
options.predicate = [NSComparisonPredicate predicateWithFormat:#"startDate > CAST(%d,\"NSDate\")",[self dateAddingDays2:-1 ToDate:[NSDate date]].timeIntervalSince1970];
by this
options.predicate = [NSComparisonPredicate predicateWithFormat:#"(startDate > %#)",[self yesterday]];
and now is working!!! thanks to #Larme