Change the label of UIPickerView

Question

I am trying to change the font of UIPickerView.

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView {
    let label = UILabel()

    label.font = UIFont(name:"SynchroLetPlain", size:20)
    //label.font = UIFont.systemFont(ofSize: 17) //Even I use systemFont, it doesn't show nothing
    return label
}

It is ok for compile though, no text is shown.

Where is defferent? I have checked SynchroLetPlain is included in project.

Answer 1

Try this one

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
        var label: UILabel
        if let view = view as? UILabel {
            label = view
        } else {
            label = UILabel()
        }
        label.font = UIFont(name:"SynchroLetPlain", size:20)
        // where data is an Array of String
        label.text = "" // set data here
        return label

    }

Additionally:

func printFonts()
    {
        for fontFamilyName in UIFont.familyNames {
            print("-- \(fontFamilyName) --", terminator: "")
            for fontName in UIFont.fontNames(forFamilyName: fontFamilyName ) {
                print(fontName)
            }
            print(" ", terminator: "")
        }
    }

Call this function, which gives you the exact name of the font which you have to use to set the font.