ColorPickerTextField - Use ColorPickerTextField when you want to show a list of colors in a UIPickerView when editing text field.

ColorPickerTextField.swift

import UIKit

public class ColorPickerTextField: PickerTextField {
    public var colorChoices = [
        UIColor.blackColor(),
        UIColor.blueColor(),
        UIColor.brownColor(),
        UIColor.darkGrayColor(),
        UIColor.cyanColor(),
        UIColor.grayColor(),
        UIColor.greenColor(),
        UIColor.lightGrayColor(),
        UIColor.magentaColor(),
        UIColor.orangeColor(),
        UIColor.purpleColor(),
        UIColor.redColor(),
        UIColor.whiteColor(),
        UIColor.yellowColor()]
    public required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.choices = [
            "Black",
            "Blue",
            "Brown",
            "Dark Gray",
            "Cyan",
            "Gray",
            "Green",
            "Light Gray",
            "Magenta",
            "Orange",
            "Purple",
            "Red",
            "White",
            "Yellow"]
        self.text = choices[0]
        self.layer.shadowRadius = 1.0
        self.onSelected = self._onSelected
    }
    public var onColorSelected:((color:UIColor)->Void)? = nil
    public func pickerView(pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        return 44.0
    }
    public func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView {
        if let timer = self._selectedTimer {
            timer.invalidate()
            self._selectedTimer = nil
        }
        let frame = CGRect(x: 0, y: 0, width: pickerView.frame.size.width, height: 44.0)
        var aView:UIView
        if let view = view {
            aView = view
        }
        else {
            aView = UIView(frame:frame)
        }
        aView.backgroundColor = colorChoices[row]
        var red:CGFloat = 0.0
        var green:CGFloat = 0.0
        var blue:CGFloat = 0.0
        var alpha:CGFloat = 0.0
        aView.backgroundColor?.getRed(&red, green: &green, blue: &blue, alpha: &alpha)
        let label = UILabel(frame: frame)
        label.attributedText = NSAttributedString(string: self.choices[row], attributes: [NSForegroundColorAttributeName:UIColor(red: 1.0 - red, green: (1.0 - green), blue:(1.0 - blue), alpha:1.0)])
        label.textAlignment = NSTextAlignment.Center
        aView.addSubview(label)
        return aView
    }
    private func _onSelected(row: Int) {
        self.backgroundColor = self.colorChoices[row]
        var red:CGFloat = 0.0
        var green:CGFloat = 0.0
        var blue:CGFloat = 0.0
        var alpha:CGFloat = 0.0
        self.backgroundColor?.getRed(&red, green: &green, blue: &blue, alpha: &alpha)
        self.textColor = UIColor(red: 1.0 - red, green: 1.0 - green, blue: 1.0 - blue, alpha: 1.0)
        if let selected = self.onColorSelected {
            selected(color:self.colorChoices[row])
        }
    }
    public var currentColor:UIColor {
        get {
            return self.colorChoices[self.currentRow]
        }
    }
}