conditional binding must have Optional type, not 'String'

Question

I understand that The text property of UILabel is optional, I tried adding an else but i'm not sure what else to add.

productData.product.productName is me getting the name of the product from the database

            if var pName = productData.product.productName { //error
              self.productName.text = pName
            }

@IBOutlet weak var pName: UILabel!

Initializer for conditional binding must have Optional type, not 'String' is the error I get, It was working I think im not sure where its gone wrong

The error is pretty clear. `productData.product.productName` is not optional. Why have you tried to unwrap it? — Rakesha Shastri, Mar 24 '19 at 19:14
@RakeshaShastri im trying to update the pName label with productName — kmnflask, Mar 24 '19 at 19:26

score 0 · Answer 1 · answered Mar 24 '19 at 19:13

0

It states that the use of if condition is unnecessary, because the 'productName' is not optional.

You can directly add the value to your label.

self.productName.text = productData.product.productName //Product name is not optional

Optional chaining is used when you try to get a optional value. For example, if you want to get the text of label then you'll require if condition.

if var text = self.productName.text { //Text in label is optional
   print(text)
}

answered Mar 24 '19 at 19:13

sinner

483
3
14

so how do I updated the label with the productName? – kmnflask Mar 24 '19 at 19:26
Assigning the 'productData.product.productName' to the label will update the 'productName' to it. – sinner Mar 24 '19 at 19:29
so i tried pName = productData.product.productName and i get cannot assign string to UILabel error – kmnflask Mar 24 '19 at 20:59

score 0 · Answer 2 · answered Mar 24 '19 at 19:19

It seems like the compiler is complaining that productData.product.productName is NOT an Optional. The if var name = ____ construct only works on Optionals.

If you are testing for a non-empty String, you may want to check the count or isEmpty instead.

conditional binding must have Optional type, not 'String'

2 Answers2