如何对堆栈视图中的所有标签应用相同的大小？

Question

I have a horizontal stackview filled equally with 3 labels. These labels have set adjustsFontSizeToFitWidth and minimumScaleFactor values set. 2 labels will have short texts and one may have large text. Now the large title label's font is reduced automatically and I want the other two labels to automatically update their font size to match the last label font size. Is it possible?

Label1 text - "a"

Label2 text - "b"

Label3 text - "Something long"

Now Label3's font looks smaller than Label1 and Label2.

Answer 1

To get the smallest font size, you can use the map . Then, you can use the min function to find the minimum font size in the array.

Here's an example of how you could do this:

        let labels = mainContainer
            .arrangedSubviews
            .compactMap { $0 as? UILabel }

        let newFontsSize = labels.map { label in
            var fontSize = label.font.pointSize
            
            while label.isTruncated {
                fontSize -= 0.25
                label.font = label.font.withSize(fontSize)
            }

            return fontSize
        }

        if let smallestFontSize = newFontsSize.min() {
            labels.forEach { label in
                label.font = label.font.withSize(smallestFontSize)
            }
        }

And the extension:

extension UILabel {
    var isTruncated: Bool {
        frame.width < intrinsicContentSize.width
    }

    var isClipped: Bool {
        frame.height < intrinsicContentSize.height
    }
}