CODEWITHSUNDEEP
swiftoption-typeword-wrap
Stefan Badertscher
Stefan Badertscher

Reputation: 341

How to set an optional string as text in UiTextLabel?

I have string name which seems to be an optional name. I need to set that to the textlabel. But this somehow does not seem to work as in the UI the text is not set. when I print out the string unwrapped it looks fine. But when I set the string unwrapped to the uitextlabel.text and print that one out, it seems to be not good as still the keyword optional appears. How can I assign this string unwrapped to the uitextlabel.text correctly?

var name : String?

 override func viewDidLoad() {
    super.viewDidLoad()
    print("School detail view loaded and print address")


    let rect = view.bounds

    //set header and footer
  //  schoolNameLabel.text = "set value 1"
 //   print(schoolNameLabel.text )

    if let unwrapped = self.name {
        print("print unwrapped")
        print(unwrapped)

        schoolNameLabel.text = unwrapped
        print("print label.text")
        print(schoolNameLabel.text)

    }

Output on console:

print unwrapped
Milner college

print label.text
Optional("Milner college")

Upvotes: 1

Views: 1109

Answers (3)

Jayesh Miruliya
Jayesh Miruliya

Reputation: 3317

print(schoolNameLabel.text!) //add this ! optional sign.. becuase that textfiled text value may be null

Upvotes: 0

OOPer
OOPer

Reputation: 47896

You have no need to do it. I assume your schoolNameLabel is a UILabel. The property text of UILabel is declared as:

var text: String?

(UILabel Class Reference)

So, any non-Optional String is automatically converted to String?. Although print always encloses the actual content with "Optional(" & ")" for non-nil values, UILabel shows it's actual content without "Optional".

And if "shows nothing when nil" is what you want, you have no need to unwrap String?.

Just assign self.name to schoolNameLabel.text directly:

    schoolNameLabel.text = self.name

It never crashes your app, and just "shows nothing", even if self.name is nil.

Upvotes: 2

Lu_
Lu_

Reputation: 2685

if let unwrapped = self.name! {

try to save it in unwrapped really as unwrapped so don't miss "!"

Upvotes: 1

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