CoreData conditionally fetching on NSDate using NSPredicate (swift)

Question

Basically I have an entity called TimeLoc that has three attributes: time, latitude and longitude. And their types are Date, Double and Double respectively. I got stuck when

Answer 1

I guess you are sending parameters to the predicate in NSDate format :

let predicate = NSPredicate(format: "time>= \(startTime) AND time<= \(endTime)")

Here your startTime and endTime is of type NSDate . Try to convert it in String format and pass it to the predicate . It should work .

Reference : NSPredicate: filtering objects by day of NSDate property

Answer 2

The accepted solution did not work for me, though it made intuitive sense. As an alternative, I created a predicate so search a range, like so:

"%K BETWEEN {%@, %@}" where %K is my key path, and the two %@s are my start and end dates.

let datePredicate = NSPredicate(format: "%K BETWEEN {%@, %@}", argumentArray: [#keyPath(Activity.startTime), startDate!.startOfDay, endDate!.endOfDay])