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iOS Build a Playlist Browser with Swift Building the Music Library and Playlist Models Struct Initialization

Posted by Deepa Laxmi
Deepa Laxmi
3,035 Points

fatal error: unexpectedly found nil while unwrapping an Optional value

Pasan Premaratne I am getting fatal error: unexpectedly found nil while unwrapping an Optional value on

artists += playlistDictionary[artists] as! [String]

I tried ver hard but I am not able to figure it out. Please help me out. I am stuck. Thanks in advance.

//
//  Playlist.swift
//  AlgoRythmn
//
//  Created by Kh. Deepalaxmi on 27/07/15.
//  Copyright (c) 2015 Kh. Deepalaxmi. All rights reserved.
//

import Foundation
import UIKit

struct Playlist {
    var title : String?
    var description: String?
    var icon: UIImage?
    var largeIcon: UIImage?
    var artists : [String] = []
    var backgroundColor: UIColor = UIColor.clearColor()

    init(index : Int)
    {
        let musicLibrary = MusicLibrary().library
        let playlistDictionary = musicLibrary[index]
        title = playlistDictionary["title"] as! String!
        description = playlistDictionary["description"] as! String!
        let iconName = playlistDictionary["icon"] as! String!
        icon = UIImage(named: iconName)

        let largeIconName = playlistDictionary["largeIcon"] as! String!
        largeIcon = UIImage(named: largeIconName)

        artists += playlistDictionary[artists] as! [String]

        let colorDictionary = playlistDictionary["backgroundColor"] as! [String : CGFloat]
        backgroundColor = rgbColorFromDictionary(colorDictionary)


    }

    func rgbColorFromDictionary( colorDictionary : [String: CGFloat]) -> UIColor
    {
        let red = colorDictionary["red"]!
        let green = colorDictionary["green"]!
        let blue = colorDictionary["blue"]!
        let alpha = colorDictionary["alpha"]!

        return UIColor(red: red/255.0 , green: green/255.0, blue: blue/255.0 , alpha: alpha)


    }

}
Deepa Laxmi
Deepa Laxmi
3,035 Points

@paradoxed please help me out

Deepa Laxmi
Deepa Laxmi
3,035 Points

I just figured out. It was my silly mistake. artists should be inside quotes.

artists += playlistDictionary["artists"] as! [String]