How to change font size in select mode? I read a lot of questions about this, but none of them are in Swift 3. I have three kinds of choices; the first two have two columns and have the same data source and delegate. The latter has one column and has a different data source and delegate. I can’t put the text in the first two kinds of selections with one character. How to reduce the font size in UIPickerView and, if necessary, adjust the height of the line of sight of the collector? Thanks.
class ViewController: UIViewController { //MARK: Properties @IBOutlet weak var layoutLengthPicker: UIPickerView! @IBOutlet weak var layoutWidthPicker: UIPickerView! @IBOutlet weak var trackPicker: UIPickerView! let layoutLengthPickerDelegate = DimensionsPickerDelegate() let layoutWidthPickerDelegate = DimensionsPickerDelegate() let trackPickerDelegate = TrackPickerDelegate() override func viewDidLoad() { super.viewDidLoad() layoutLengthPicker.delegate = layoutLengthPickerDelegate layoutLengthPicker.dataSource = layoutLengthPickerDelegate layoutWidthPicker.delegate = layoutWidthPickerDelegate layoutWidthPicker.dataSource = layoutWidthPickerDelegate trackPicker.delegate = trackPickerDelegate trackPicker.dataSource = trackPickerDelegate // Do any additional setup after loading the view, typically from a nib. } //MARK: Actions override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } } class DimensionsPickerDelegate: NSObject, UIPickerViewDataSource, UIPickerViewDelegate { let feet = ["0 Ft.", "1 Ft.", "2 Ft.", "3 Ft.", "4 Ft.", "5 Ft.", "6 Ft.", "7 Ft.", "8 Ft.", "9 Ft.", "10 Ft.", "11 Ft.", "12 Ft.", "13 Ft.", "14 Ft.", "15 Ft.", "16 Ft.", "17 Ft.", "18 Ft.", "19 Ft.", "20 Ft.", "21 Ft.", "22 Ft.", "23 Ft.", "24 Ft.", "25 Ft.", "26 Ft.", "27 Ft.", "28 Ft.", "29 Ft.", "30 Ft.", "31 Ft.", "32 Ft.", "33 Ft.", "34 Ft.", "35 Ft.", "36 Ft.", "37 Ft.", "38 Ft.", "39 Ft.", "40 Ft.", "41 Ft.", "42 Ft.", "43 Ft.", "44 Ft.", "45 Ft.", "46 Ft.", "47 Ft.", "48 Ft.", "49 Ft.", "50 Ft.", "51 Ft.", "52 Ft.", "53 Ft.", "54 Ft.", "55 Ft.", "56 Ft.", "57 Ft.", "58 Ft.", "59 Ft.", "60 Ft.", "61 Ft.", "62 Ft.", "63 Ft.", "64 Ft.", "65 Ft.", "66 Ft.", "67 Ft.", "68 Ft.", "69 Ft.", "70 Ft.", "71 Ft.", "72 Ft.", "73 Ft.", "74 Ft.", "75 Ft.", "76 Ft.", "77 Ft.", "78 Ft.", "79 Ft.", "80 Ft.", "81 Ft.", "82 Ft.", "83 Ft.", "84 Ft.", "85 Ft.", "86 Ft.", "87 Ft.", "88 Ft.", "89 Ft.", "90 Ft.", "91 Ft.", "92 Ft.", "93 Ft.", "94 Ft.", "95 Ft.", "96 Ft.", "97 Ft.", "98 Ft.", "99 Ft.", "100 Ft."] let inches = ["0 In.", "1 In.", "2 In.", "3 In.", "4 In.", "5 In.", "6 In.", "7 In.", "8 In.", "9 In.", "10 In.", "11 In.", "12 In."] func numberOfComponents(in pickerView: UIPickerView) -> Int { return 2 } func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { if component == 0 { return feet.count } else { return inches.count} } func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { if component == 0 {return feet[row]} else {return inches[row]} } } class TrackPickerDelegate: NSObject, UIPickerViewDataSource, UIPickerViewDelegate { let manufacturers = ["Atlas True Track", "Atlas Code 100", "Atlas Code 83", "Bachmann Nickel Silver", "Bachmann Steel Alloy", "Kato", "Life-Like Trains Code 100", "LIfe-Like Trains Power-Loc", "Peco Code 100", "Peco Code 83", "Peco Code 75", "Shinohara Code 100", "Shinohara Code 70", "Walthers"] func numberOfComponents(in pickerView: UIPickerView) -> Int { return 1 } func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { return manufacturers.count } func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { return manufacturers[row] } }