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RZGDayOfWeekPicker.swift
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RZGDayOfWeekPicker.swift
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//
// RZGDayOfWeekPicker.swift
// DayOfTheWeekPicker
//
// Created by Ryan Zegray on 2016-08-27.
// Copyright © 2016 Ryan Zegray. All rights reserved.
//
import UIKit
@objc protocol RZGDayOfWeekPickerDelegate {
optional func dayWasSelected(picker: RZGDayOfWeekPicker, selectedIndex: Int)
optional func dayWasDeselected(picker: RZGDayOfWeekPicker, deselectedIndex: Int)
}
@IBDesignable
class RZGDayOfWeekPicker: UIView {
var delegate: RZGDayOfWeekPickerDelegate?
// MARK: Attribute Inspector variables
@IBInspectable
var unselectedColor: UIColor = UIColor.blackColor() { didSet { customizeButtonAppearance() } }
@IBInspectable
var selectedColor: UIColor = UIColor.redColor() { didSet { customizeButtonAppearance() } }
@IBInspectable
var textColor: UIColor = UIColor.whiteColor() { didSet { customizeButtonAppearance() } }
@IBInspectable
var fontSize: CGFloat = 16 { didSet { customizeButtonAppearance() } }
@IBInspectable
var spacing: CGFloat = 5 { didSet { positionButtons() } }
// MARK: Instance variables and structs
private struct RZGDayOfWeekPickerDay {
var name: String
var selected: Bool
}
private var daysOfWeek = [
RZGDayOfWeekPickerDay(name: "S", selected: false),
RZGDayOfWeekPickerDay(name: "M", selected: false),
RZGDayOfWeekPickerDay(name: "T", selected: false),
RZGDayOfWeekPickerDay(name: "W", selected: false),
RZGDayOfWeekPickerDay(name: "T", selected: false),
RZGDayOfWeekPickerDay(name: "F", selected: false),
RZGDayOfWeekPickerDay(name: "S", selected: false),
]
private var daysOfWeekButtons = [UIButton]()
// MARK: Inits
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
createButtons()
}
override init(frame: CGRect) {
super.init(frame: frame)
createButtons()
}
// MARK: Placing and Customizing the button's
/// Creates and places the buttons for each day of the week
private func createButtons() {
for _ in daysOfWeek {
let button = UIButton()
button.addTarget(self, action: #selector(RZGDayOfWeekPicker.dayOfWeekButtonTapped(_:)), forControlEvents: [.TouchDown,.TouchDragEnter, .TouchDragExit])
daysOfWeekButtons.append(button)
addSubview(button)
}
}
/// Positions each button within the frame
private func positionButtons() {
let areaUsedBySpacing = spacing * CGFloat(daysOfWeek.count + 1)
let buttonSideLength = min((frame.width - areaUsedBySpacing) / CGFloat(daysOfWeek.count), frame.height)
let buttonSize = CGSize(width: buttonSideLength, height: buttonSideLength)
for (index, button) in daysOfWeekButtons.enumerate() {
let buttonOrigin = CGPoint(x: spacing + (CGFloat(index) * (buttonSideLength + spacing)), y: 0)
button.frame = CGRect(origin: buttonOrigin, size: buttonSize)
button.layer.cornerRadius = 0.5 * button.bounds.size.width
button.setTitle(daysOfWeek[index].name, forState: UIControlState.Normal)
}
}
/// Customizes the appearance of each button
private func customizeButtonAppearance() {
for (index, button) in daysOfWeekButtons.enumerate() {
button.backgroundColor = daysOfWeek[index].selected ? selectedColor : unselectedColor
button.titleLabel?.font = UIFont.systemFontOfSize(fontSize)
button.setTitleColor(textColor, forState: UIControlState.Normal)
}
}
override func layoutSubviews() {
positionButtons()
customizeButtonAppearance()
}
// MARK: DayOfWeekPicker User Interaction
@objc private func dayOfWeekButtonTapped(sender: UIButton) {
if let index = daysOfWeekButtons.indexOf(sender) {
if daysOfWeek[index].selected == true {
deselectDayWithIndex(index)
} else {
selectDayWithIndex(index)
}
}
}
// MARK: Methods for getting and setting the data in the DayOfTheWeekPicker
/// Given a index of a day it returns if that day is selected.
func dayIsSelectedAtIndex(index: Int) -> Bool {
if index >= 0 && index < 7 {
return daysOfWeek[index].selected
}
return false
}
/// Returns an array of ints for all selected days
func indexOfSelectedDays() -> [Int] {
return daysOfWeek.enumerate().filter( { $0.element.selected == true } ).map( { $0.index })
}
/// Sets the day with the index given to selected
func selectDayWithIndex(index: Int) {
if index >= 0 && index < 7 {
daysOfWeek[index].selected = true
daysOfWeekButtons[index].backgroundColor = selectedColor
delegate?.dayWasSelected?(self, selectedIndex: index)
}
}
/// Sets the day with the index given to not-selected
func deselectDayWithIndex(index: Int) {
if index >= 0 && index < 7 {
daysOfWeek[index].selected = false
daysOfWeekButtons[index].backgroundColor = unselectedColor
delegate?.dayWasDeselected?(self, deselectedIndex: index)
}
}
}