PickerView With Button in Swift
Create NSObject ( DPPickerManager) : -
import UIKit
public typealias DPPickerCompletion = (_ cancel: Bool) -> Void
public typealias DPPickerDateCompletion = (_ date: Date?, _ cancel: Bool) -> Void
public typealias DPPickerValueIndexCompletion = (_ value: String?, _ index: Int, _ cancel: Bool) -> Void
open class DPPickerManager: NSObject, UIPickerViewDelegate, UIPickerViewDataSource {
static let shared = DPPickerManager()
private typealias PickerCompletionBlock = (_ cancel: Bool) -> Void
private var alertView: UIAlertController?
private var pickerValues: [String]?
private var pickerCompletion: PickerCompletionBlock?
@objc open var timeZone: TimeZone? = TimeZone(identifier: "EN")
// MARK: - Show
@objc open func showPicker(title: String?, selected: Date?, completion:DPPickerDateCompletion?) {
let currentDate = Date()
let gregorian = NSCalendar(calendarIdentifier: .gregorian)
var components = DateComponents()
components.year = -110
let minDate = gregorian?.date(byAdding: components, to: currentDate, options: NSCalendar.Options(rawValue: 0))
self.showPicker(title: title, selected: selected, min: minDate, max: currentDate, completion: completion)
}
@objc open func showPicker(title: String?, selected: Date?, min: Date?, max: Date?, completion:DPPickerDateCompletion?) {
self.showPicker(title: title, picker: { (picker) in
picker.date = selected ?? Date()
picker.minimumDate = min
picker.maximumDate = max
picker.timeZone = self.timeZone
picker.datePickerMode = .date
}, completion: completion)
}
@objc open func showPicker(title: String?, picker:((_ picker: UIDatePicker) -> Void)?, completion:DPPickerDateCompletion?) {
let datePicker = UIDatePicker()
datePicker.timeZone = self.timeZone
picker?(datePicker)
self.showPicker(title: title, view: datePicker) { (cancel) in
completion?(datePicker.date, cancel)
}
}
@objc open func showPicker(title: String?, selected: String?, strings:[String], completion:DPPickerValueIndexCompletion?) {
self.pickerValues = strings
let picker = UIPickerView()
picker.delegate = self
picker.dataSource = self
if let value = selected {
picker.reloadAllComponents()
if strings.count > 0 {
OperationQueue.current?.addOperation {
let index = strings.index(of: value) ?? 0
picker.selectRow(index, inComponent: 0, animated: false)
}
}
}
self.showPicker(title: title, view: picker) { (cancel) in
var index = -1
var value: String? = nil
if !cancel, strings.count > 0 {
index = picker.selectedRow(inComponent: 0)
if index >= 0 {
value = self.pickerValues?[index]
}
}
completion?(value, index, cancel || index < 0)
}
}
@objc open func showPicker(title: String?, view: UIView, completion:DPPickerCompletion?) {
var center: CGFloat?
var buttonX: CGFloat = 0
let image = UIImage(named: "cancel_image")?.withRenderingMode(.alwaysTemplate)
// trick
let alertView = UIAlertController(title: title, message: "\n\n\n\n\n\n\n\n\n\n", preferredStyle: .actionSheet);
alertView.view.addSubview(view)
alertView.popoverPresentationController?.sourceView = UIViewController.top?.view
alertView.popoverPresentationController?.sourceRect = view.bounds
alertView.view.tintColor = .gray
self.alertView = alertView
// device orientation
switch UIApplication.shared.statusBarOrientation {
case .landscapeLeft, .landscapeRight:
center = UIViewController.top?.view.center.y
buttonX = alertView.view.frame.size.height - (image!.size.height * 2)
case .portrait, .portraitUpsideDown:
center = UIViewController.top?.view.center.x
buttonX = alertView.view.frame.size.width - (image!.size.width * 2)
default: break
}
view.center.x = center ?? 0
view.transform = .init(translationX: -10, y: title != nil ? 35 : 0)
self.pickerCompletion = completion
// close button
let close = UIButton(frame: CGRect(x: buttonX - 10 , y: 10, width: image!.size.width, height: image!.size.height))
close.tintColor = .gray
close.setImage(image!, for: .normal)
close.addTarget(self, action: #selector(pickerClose(_:)), for: .touchUpInside)
alertView.view.addSubview(close)
// ok button
let ok = UIAlertAction(title: "Ok", style: .default) { (action) in
completion?(false)
}
alertView.addAction(ok)
UIViewController.top?.present(alertView, animated: true, completion: nil)
}
// MARK: - Picker Delegates
public func numberOfComponents(in pickerView: UIPickerView) -> Int {
return pickerValues?.count == 0 ? 0 : 1
}
public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerValues?.count ?? 0
}
public func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return pickerValues?[row]
}
@objc internal func pickerClose(_ sender: UIButton) {
alertView?.dismiss(animated: true, completion: {
self.pickerCompletion?(true)
})
}
}
internal extension UIViewController {
static var top: UIViewController? {
get {
return topViewController()
}
}
static var root: UIViewController? {
get {
return UIApplication.shared.delegate?.window??.rootViewController
}
}
static func topViewController(from viewController: UIViewController? = UIViewController.root) -> UIViewController? {
if let tabBarViewController = viewController as? UITabBarController {
return topViewController(from: tabBarViewController.selectedViewController)
} else if let navigationController = viewController as? UINavigationController {
return topViewController(from: navigationController.visibleViewController)
} else if let presentedViewController = viewController?.presentedViewController {
return topViewController(from: presentedViewController)
} else {
return viewController
}
}
}
ViewController.swift : -
import UIKit
class ViewController: UIViewController {
@IBAction func didStringsPicker() {
let values = ["Value 1", "Value 2", "Value 3", "Value 4"]
DPPickerManager.shared.showPicker(title: "Strings Picker", selected: "Value 1", strings: values) { (value, index, cancel) in
if !cancel {
// TODO: you code here
debugPrint(value as Any)
}
}
}
@IBAction func didDatePicker() {
let min = Date()
let max = min.addingTimeInterval(31536000) // 1 year
DPPickerManager.shared.showPicker(title: "Date Picker", selected: Date(), min: min, max: max) { (date, cancel) in
if !cancel {
// TODO: you code here
debugPrint(date as Any)
}
}
}
@IBAction func didTimePicker() {
DPPickerManager.shared.showPicker(title: "Time Picker", picker: { (picker) in
picker.date = Date()
picker.datePickerMode = .time
}) { (date, cancel) in
if !cancel {
// TODO: you code here
debugPrint(date as Any)
}
}
}
}
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