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iOS Build a Self-Destructing Message iPhone App Relating Users in Parse.com Removing Friends by Tapping on a Table View Cell

Posted by Vikram Pal
Vikram Pal
Courses Plus Student 307 Points

Removing Friends Challenge 2/3

I put:

PFRelation *relation = [self.playlist relationforKey:@"videos", self.video relationforKey:@"videos"];

Hmm?

2 Answers

Patrick Donahue
Patrick Donahue
9,523 Points
Patrick Donahue
Patrick Donahue
9,523 Points

Challenge 1 asks you to implement relation. Challenge 2 asks you to add the object "videos" to relation. So you need to remove the ", self.video relationforKey:@"videos"];

1) PFRelation *relation = [self.playlist relationforKey:@"videos"]; 2) [relation addObject:video];

Vikram Pal
Vikram Pal
Courses Plus Student 307 Points

Having some trouble on 3 also

Finally, we need to save these changes up to the Parse back-end. The relation is part of the 'playlist' property, where 'playlist' is an instance of PFObject. Save 'playlist' in the background to save the changes to the relation (don't worry about using any blocks).

import "FavoriteMoviesViewController.h"

@implementation FavoriteMoviesViewController

  • (void)addVideoToPlaylist:(PFObject *)video { // Add custom code below! PFRelation *relation = [self.playlist relationforKey:@"videos"]; [relation addObject:video]; [self.playlist saveInBackground:^(BOOL succeeded, NSError *error){

    }]; }

@end

busterlabs
busterlabs
9,276 Points
busterlabs
busterlabs
9,276 Points

Try this:

[self.playlist saveInBackground];