I have been searching for an hour with no success so hope one of you will have pity. I am using Xcode 9 and Swift 4.
textIt.text = name Works perfectly and I have used it in my app but
name = textIt.text brings up the error code:
Value of optional type 'String?' not unwrapped; did you mean to use '!' or '?'?
All I want to do is to put some text from a variable into a field so the user can change it then I put the text back into the variable.
What am I doing wrong?
In swift if a variable is optional and you want to set it to another you must use ! or ?? or If let You can try
let name = textIt.text ?? "" OR
if let name = textIt.text { print("name is : \(name)") } OR but it may result in a crash if value is nil
let name = (textIt.text)! 
let name = textIt.text!. The text property is guaranteed never to return nil. It will return the empty string if there is no text.
nil.text property is optional so it needs to be unwrapped. But since it never actually returns nil, it is safe to force-unwrap.You can track "name" variable when setting and getting textIt using something called Computer Property. This will allow you to tie your variable name and your text field.
var name:String? { get { return textIt.text } set { textIt.text = newValue } } When you set your name variable, textIt will automatically will be set. On the otherhand, when you get the name variable, i will get the value from textIt.
Since the name variable is optional you can use the following code to unwrap.
If let userName = name {
}