CODEWITHSUNDEEP
objective-cdatecore-dataios7nspredicate
PSP
PSP

Reputation: 196

Date comparison in coredata NSPredicate

In my application I am using CoreData. Some date values are stored in coredata as NSString. In my Interface Builder i have a textfield.When i enter a date on my textfield This date will compare dates in saved in coredata.

What will be the solution.I just goes through this way Example It Not be worked on my project because i want to convert string to date on my NSPredicate method.

My code is

NSPredicate *p3 = [NSPredicate predicateWithFormat:@"acc_date >= %@ AND acc_date<=%@", theDate, date1];

Here acc_date is dates from Database that is stored as string theDate and date1 are my inputs

Upvotes: 1

Views: 1068

Answers (1)

Marcus S. Zarra
Marcus S. Zarra

Reputation: 46718

If you continue to store the dates as strings then you cannot do any kind of comparison like you are attempting.

If you store them as actual NSDate instances then your comparison will work. The issue is not with your predicate but with how you are storing your data in Core Data.

I would suggest migrating your database, either with a heavy migration or with a manual migration. If your data is disposable then I would change the fields and reset your database to use NSDate instances.

Upvotes: 2

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