Playlist app, images not displaying via code

When we change the Playlist app to display the images, for example the coffee image, via code as opposed to letting Interface Building do it I'm not getting the images showing when the app runs. The correctly colored UIImageView shows but in the master view neither the placeholder nor the actual image display.

I have traced through the code path meaning the image is in place in the library corrected and mapped through kIcon, then the string playlistIcon points to that. Everything lines up but no image shows in the Simulator. I do see them as available in Interface Builder meaning where placeholder is shown all the images are also there as options so Xcode is seeing the cassette correctly.

I have tried giving a literal path in the library for the kIcon:@"/Users/Admin/documents... so forth to coffee.pdf" as opposed to just @"coffee.pdf" but no success.

here is the initial code block for the _library the way pasan has it... thanks for input. Jim

- (instancetype)init {
    self = [super init];
    if (self) {
        _library = @[@{kTitle: @"Rise and Shine",
                       kDescription: @"Get your morning going by singing along to these classic tracks as you hit the shower bright and early!",
                       kIcon: @"coffee.pdf",
                       kLargeIcon: @"coffee_large.pdf",
                       kBackgroundColor: @{@"red": @255.0, @"green": @204.0, @"blue": @51.0, @"alpha": @1.0},
                       kArtists: @[@"American Authors", @"Vacationer", @"Matt and Kim", @"MGMT", @"Echosmith", @"Tokyo Police Club", @"La Femme"]
                       },