UIImage on swift can't check for nil

Update

Swift now added the concept of failable initializers and UIImage is now one of them. The initializer returns an Optional so if the image cannot be created it will return nil.

---

Variables by default cannot be nil. That is why you are getting an error when trying to compare image to nil. You need to explicitly define your variable as optional:

let image: UIImage? = UIImage(contentsOfFile: filePath)
if image != nil {
   return image!
}

The simplest way to check if an image has content (> nil) is:

    if image.size.width != 0 { do someting} 

func imageIsNullOrNot(imageName : UIImage)-> Bool
{

   let size = CGSize(width: 0, height: 0)
   if (imageName.size.width == size.width)
    {
        return false
    }
    else
    {
        return true
    }
}

the Above method call Like as :

 if (imageIsNullOrNot(selectedImage))
 {
     //image is not null
 }
 else
 {
    //image is null
 }

here, i check image size.