Challenge Part I Managing Playlist Data. Assigning profilePictureName.

Hi Timothy!

I assume that this is about the Create UIImageviews challenge: http://teamtreehouse.com/library/build-a-playlist-browser-with-objectivec/managing-playlist-data/creating-uiimageviews

Challenge Task 1 of 3

Let’s assume we have a data model, Treehouse, that contains a property, friends of type NSDictionary which contains information about our friends. We also have a User model that retrieves information from the friends dictionary and creates a User instance. For this challenge, we want to store the User’s profile picture as a property. Let’s start by retrieving the image name as a string from the friends dictionary and storing that in the profileImageName property of the User model. In User.m, use the key profilePicture to get the relevant information.

After downloading the zip files for the course, I combed through them and found file "Playlist.m" seem most relevant (watching the videos, was as usual, not very helpful in figuring out what these challenges want...).

There were two NSDictionary lines in that file and since the question didn't have anything to do with color I focused in on the other one:

NSDictionary *playlistDictionary = library[index];

So looking at the code already given in User.m,

I'm thinking this corresponds roughly (very roughly) to this line:

NSDictionary *friendsDict = treehouse.friends;

..which is basically putting all the treehouse.friends data into friendsDict.

Then there are a couple of lines below that which assign certain keys from within friendsDict :

        _firstName = [friendsDict objectForKey:@"firstName"];
        _lastName = [friendsDict objectForKey:@"lastName"];

I'm assuming both these pieces of data are NSString type (even though there isn't specifically a line that says NSString like the line int the zip files Playlist.m):

        NSString *iconName = [playlistDictionary objectForKey:kIcon];
        _playlistIcon = [UIImage imageNamed:iconName];

I'm assuming looking at the above two lines is where you came up with

the two lines you tried to use that didn't pass:

        NSString *profileImageName = [friendsDict objectForKey:@"profilePicture"];
        _profileImageName = [UIImage imageNamed:profileImageName];

..but I wondered...what if it's as simple as one of the lines that begins with an underscore.

Hmmmm....

So I (after re-reading over the challenge question several hundred times) I came up with this line (after numerous try and error attempts):

_profileImageName  = [friendsDict objectForKey:@"profilePicture"];

...which, when added to the user.m file, makes it look like:

#import "User.h"
#import "Treehouse.h"

@implementation User

- (instancetype)init
{
    self = [super init];
    if (self) {
        Treehouse *treehouse = [[Treehouse alloc] init];
        NSDictionary *friendsDict = treehouse.friends;

        _firstName = [friendsDict objectForKey:@"firstName"];
        _lastName = [friendsDict objectForKey:@"lastName"];
        _profileImageName  = [friendsDict objectForKey:@"profilePicture"];

        //Enter your code below!
    }
    return self;
}

@end

..and for some strange reason it passed!

(don't ask me why, though..but hopefully it helps you get further along..)

Challenge 1 of 3 done.

On to the next challenge...

................

Challenge Task 2 of 3

Now that we have the image name as a string, let’s create a UIImage instance using the profileImageName property to retrieve an image. Store this UIImage instance in the profileImage property of the User model. Hint: Use the imageNamed: UIImage class method.

Huh?!

That's where I'm stuck right now...

None of these lines is passing:

 //Enter your code below!
  //UIImage *profileImage = [UIImage imageNamed:profileImageName];
  //UIImage *profileImage = [UIImage imageNamed:@profileImageName];
//UIImage *profileImage = [UIImage imageNamed:@"profileImageName"];
    UIImage *profileImage = [UIImage imageNamed:_profileImageName];

Oh, and this thread is the only one under these forum categories:

https://teamtreehouse.com/forum/syllabus:1192

https://teamtreehouse.com/forum/stage:4832

https://teamtreehouse.com/forum/code-challenge:6412