更改UIPickerView中文本的高度？

Question

如何更改UIPickerView中文本的高度？可能吗？我想降低默认高度。

Answer 1

SWIFT 2.2

在pickerView的委托中实现pickerView（pickerView：UIPickerView，viewForRow行：Int，forComponent组件：Int，reusingView view：UIView？）方法。

func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView {
let label: UILabel = UILabel(frame: CGRectMake(0, 0, scalePicker!.frame.size.width / 2, scalePicker!.frame.size.height / 7))
        label.textColor = UIColor.whiteColor()
        label.font = UIFont(name: "Gotham-Medium", size: 20)
        switch component {
        case 0:
            label.text = height_array[row] as? String
            label.textAlignment = .Center
        case 1:
            label.text = unit_Arr[row] as? String
            label.textAlignment = .Left
        default:
            break
        }

        return label
}