Multiline UILabel with right-to-left text and auto adjusted font size

0
votes

Below is the code in Swift I used for a 2 line UILabel with adjustsFontSizeToFitWidth set to true, working properly for left-to-right text. I have used EasyPeasy library for setting layout constraints.

let contactLabel = UILabel()
contactLabel.text = "Tell us how we can contact you".localized()
contactView.addSubview(contactLabel)
contactLabel.easy.layout([Leading(), Trailing(), Top(20), Height(60)])
contactLabel.numberOfLines = 2
contactLabel.lineBreakMode = .byTruncatingHead
contactLabel.adjustsFontSizeToFitWidth = true

When I changed the language to Arabic, the text will be broken to two lines properly but shown in LTR mode instead of RTL. How should manage a multiline label to show Arabic text?

I also checked this behavior on iOS 11 and it is working, maybe there is a trick to it in iOS 12.

2
iosswiftuilabelright-to-left

2 Answers

2
votes

enter image description hereDon't set a specific height because of that is not expanding to your amount of text.

Steps 1 - Set top, leading, trailing and height constraint and change height relation to Greater Than or Equal to

Step 2 - label.numberOfLines = 0

Step 3 - label.sizeToFit()

step 4 - label.lineBreakMode = .byTruncatingTail

1
votes

Although setting the label alignment to "natural" works in most cases, iOS sometimes gets it wrong. If you're out of ideas, you can always set it manually in the code based on the current layout direction of the application.

    if UIApplication.shared.userInterfaceLayoutDirection == .leftToRight {
        resultLabel.textAlignment = .left
    } else {
        resultLabel.textAlignment = .right
    }