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iOS Build a Self-Destructing Message iPhone App Relating Users in Parse.com Adding the Edit Friends Screen

Ericson Ortega
Ericson Ortega
3,307 Points
Posted by Ericson Ortega
Ericson Ortega
3,307 Points

Stage 2 iOS self destructing message app challenge stuck

I can't proceed my code and I don't know what is wrong.

here is my code for the challenge:

- (void)viewDidLoad {
    [super viewDidLoad];
    PFQuery *query;
    [PFQuery queryWithClassName:@"Apps"];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (error) {
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
        else {
          self.Apps=objects;
        }
    }

}

1 Answer

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

you almost have it correct, but you have a few errors that are keeping you from passing.

in task 1 you need to assign the return value of the queryWithClassName method to your query. you just declared the query, you never assigned it a value. so fix that:

PFQuery *query = [PFQuery queryWithClassName:@"Apps"];

you need to close the call to findObjectsInBackground with block by adding the closing bracket and semicolon:

 [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {

        if (error) {
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
        else {

             self.Apps=objects;

        }
    }]; //close the method

you also forgot to reload the tableView in task 3

else {

             self.Apps=objects;
             //reload the tableView
             [self.tableView reloadData];
        }

so fixing those errors leaves you

#import "AppsViewController.h"
#import <Parse/Parse.h>

@implementation AppsViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    //set the query
    PFQuery *query = [PFQuery queryWithClassName:@"Apps"];

    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {

        if (error) {
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
        else {

             self.Apps=objects;
             //reload the tableView
             [self.tableView reloadData];
        }
    }]; //close the method
}

@end