Fatal error: Unexpectedly found nil while unwrapping an Optional value when creating SKSpriteNode

Question

I want to make a game when a player touches screen, a gem is showing up on the screen, but I have an error Fatal error: Unexpectedly found nil while unwrapping an Optional value. How to fix it?

I doing this:

var gem : SKSpriteNode!

override func touchesBegan(_ touches: Set<UITouch>, with the event: UIEvent?) {

    gem = SKSpriteNode(fileNamed: "CoolGem")!
    gem.position = CGPoint(x: 0, y: 0)
    addChild(gem)
    gem.run(SKAction.move(to: CGPoint(x: Double.random(in: -100...100), y: Double.random(in: -100...100)), duration: 1))

}

The error tells me this: Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value on the 3rd line

score 0 · Answer 1 · answered May 20 '19 at 16:56

0

From the looks of it, there's no file named CoolGem. Since you used force unwrapping (!), the app crashes because your gem variable is nil.

answered May 20 '19 at 16:56

Adis

4,512
2
33
40

I have a file called "Gem" – ExeRhythm May 20 '19 at 17:05
It still dont work – ExeRhythm May 20 '19 at 17:12
File needs to be named "CoolGem", not "Gem". That, or change the line where you look for the file named "CoolGem" into gem = SKSpriteNode(fileNamed: "Gem")! – Adis May 21 '19 at 07:41

score 0 · Accepted Answer · answered May 20 '19 at 17:35

is the image added to your project? is it in an asset catalog?

if so try accessing it like so

gem = SKSpriteNode(imageNamed: "Gem")

or you can ensure that it won't be nil

if let gem = SKSpriteNode(imageNamed: "Gem") as? SKSpriteNode {
    self.gem = gem
    gem.position = CGPoint(x: 0, y: 0)
    addChild(gem)
    gem.run(SKAction.move(to: CGPoint(x: Double.random(in: -100...100), y: Double.random(in: -100...100)), duration: 1))
}

Fatal error: Unexpectedly found nil while unwrapping an Optional value when creating SKSpriteNode

2 Answers2