UIView viewwithtag method in swift

Question

I'm trying to learn some swift. I programmatically add labels. I want to change their properties later.

the viewwithtag method returns a UIView, how to I access my UILabel from this?

cheers

Solution 1

You need to use a typecast. This code will do it:

    if let theLabel = self.view.viewWithTag(123) as? UILabel {
        theLabel.text = "some text"
    }

Solution 2

viewWithTag: returns a UIView, you need to typecast it to UILabel.

var yourLabel : UILabel = yourView.viewWithTag(yourTag) as! UILabel;

Solution 3

You need to write as

var getMyLabel : UILabel = self.view.viewWithTag(tagValue) as UILabel;

Comments

[Andrey Chernukha]

isn't UILabel an UIView? think about it

[tchnvkng]

It is answered by Adam, Midhun, and iPatel.

[Konrad77]

"var theLabel : UILabel = self.view.viewWithTag(123) as? UILabel" Shouldn't it be using ? as you can't be sure viewWithTag is not returning nil?

[Adam]

@Konrad77 well spotted. I have edited the answer

[Toseef Khilji]

It gives error, 'UILabel?' does not have a member named 'text'

[Toseef Khilji]

it gives fatal error: unexpectedly found nil while unwrapping an Optional value . i am using Xcode 6.1

[Adam]

@Virussmca read about optionals here.

[UGandhi]

it gives fatal error: unexpectedly found nil while unwrapping an Optional value . i am using Xcode 9.1

[Adam]

@Coder Impossible to get that error using the code from my answer. It uses conditional unwrapping to prevent that exact error.