Swift Fatal Error with if statement

Question

I am new to swift and have a small amount of code that I just can't seem to get to work:

if Tick1.state == NSOnState {
    Textmain4.stringValue = "Quality Enabled"
}

This if statement spits out

fatal error: unexpectedly found nil while unwrapping an Optional value

What do I need to do to fix this?

Tick1 is an NSButton and Textmain4 is an NSTextField.

Place a breakpoint on the `if` statement. When it hits it, see which is `nil`: `Tick1` or `Textmain4`. It's very obvious that one of them is. Also, learn how to use Swift conventions - class instances use camel-case. :-) Good luck! — , Aug 17 '17 at 18:15

score 0 · Accepted Answer · answered Aug 17 '17 at 18:50

0

If Tick1 or Textmain4 is an implicitly unwrapped optional (declared with an !, like let Tick1: UIButton!), you can still use ? to safely unwrap the object:

if Tick1?.state == NSOnState {
    Textmain4?.stringValue = "Quality Enabled"
}

answered Aug 17 '17 at 18:50

Cal Stephens

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Thanks that worked! – Dylan Aug 17 '17 at 18:52

Swift Fatal Error with if statement

1 Answers1