在项目中添加了自定义字体，但是当我尝试使用它们时，出现“严重错误：在展开可选值时意外发现nil”

Question

I added a custom font to my project and made sure it was in the "Copy Bundle Resources" in Build Phases. I also made sure it was added properly to the plist file:

but when I set up a function for placeholder text :

let attributes = [
  NSForegroundColorAttributeName: UIColor.white,
  NSFontAttributeName : UIFont(name: "NeutraText-Bold", size: 17)!
]


func placeHolder(_ text: String) -> (NSAttributedString){
  return NSAttributedString(string: text, attributes:attributes)
}

   signUpTextField.attributedPlaceholder = placeHolder("Sign Up")

I get the error:

fatal error: unexpectedly found nil while unwrapping an Optional value

for the line

  NSFontAttributeName : UIFont(name: "NeutraText-Bold", size: 17)!

Answer 1

If you are using folder reference to keep your fonts, you need to make sure that folder itself is assigned to your target.

If you case, mark the top folder you have, and on the right side, check if Target Membership is marked correctly.