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iOS

Posted by Kyle Robertson
Kyle Robertson
31,600 Points

How do I use a background image without force unwrapping it?

On a project I'm working on, I have an image in the assets catalog that loads fine if I force unwrap it, but when I use the pattern Pasan teaches in the optional binding video, xcode keeps telling me I need to add an exclamation mark to it.

if let backgroundImage = UIColor(patternImage: UIImage(named: "login_bg.png")) {
      self.view.backgroundColor = backgroundImage
}

The only way I can get it to work is with this

self.view.backgroundColor = UIColor(patternImage: UIImage(named: "login_bg.png")!)

Thanks for any input you could give!

Kyle

1 Answer

Chris Shaw
Chris Shaw
26,676 Points

Hi Kyle,

The video you're most likely watching was for Xcode 6.1 and earlier, since then Swift has undergone a lot of core changes which include the requirement to unwrap objects before they can be used.

Hope that helps.

Kyle Robertson
Kyle Robertson
31,600 Points

Thanks Chris!