import UIKit
#objc protocol SideBarDelegate{
func sideBarDidSelectButtonAtIndex(Index:Int)
optional func sideBarWillClose()
optional func sideBarWillOpen()
}
class SideBar: NSObject,SideBarTableViewControllerDelegate {
let barWidth:CGFloat = 150
let sideBarTableViewTopInset:CGFloat = 64
let sideBarContainerView:UIView = UIView()
let sideBarTableViewController:SideBarTableViewController = SideBarTableViewController()
var originView:UIView?
var animator:UIDynamicAnimator
var delegate:SideBarDelegate
var isSideBarOpen:Bool = false
override init() {
super.init() //ERROR ON THIS LINE
}
init(sourceView:UIView, menuItems:Array<String>) {
super.init() //ERROR ON THIS LINE
originView = sourceView
sideBarTableViewController.tableData = menuItems
animator = UIDynamicAnimator(referenceView: originView!)
setupSideBar()
let showGestureRecognizer:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "handleSwipe:")
showGestureRecognizer.direction = UISwipeGestureRecognizerDirection.Right
originView!.addGestureRecognizer(showGestureRecognizer)
let hideGestureRecognizer:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "handleSwipe:")
hideGestureRecognizer.direction = UISwipeGestureRecognizerDirection.Left
originView!.addGestureRecognizer(hideGestureRecognizer)
}
}
I HAVE IMPLEMENTED MORE METHODS BELOW BUT ERRORS ARE IN THESE LINES OF CODE
Maybe it's not necessary to override init(). Or you declare the init(sourceView:UIView, menuItems:Array<String>) as convenience like below:
convenience init(sourceView:UIView, menuItems:Array<String>) {
super.init()
self.init() // don't forget calling self.init
originView = sourceView
sideBarTableViewController.tableData = menuItems
animator = UIDynamicAnimator(referenceView: originView!)
setupSideBar()
Related
I'm have a hard time creating a user setting options. I would like the user to customize the frequency of the timer to receive the local notifications. I'm using a switch on the SystemSettingsVC to for the user to select and set the user default and I'm using the user default setting in my MainVC for the TimerInterval. My app runs but the time doesnt change. I know that the switch is working because I'm also testing the background color change.
Here is my code for my SystemSettingsVC:
...
import UIKit
import SwiftUI
import CoreData
class SettingsViewController: UIViewController {
#IBOutlet weak var timeSelection: UISegmentedControl!
let userDefaults = UserDefaults.standard
let TIME_KEY = "TIME_KEY"
let ONE_HOUR_KEY = 60.0
let THREE_HOUR_KEY = 120.0
let SIX_HOUR_KEY = 300.0
override func viewDidLoad() {
super.viewDidLoad()
updateTime()
}
func updateTime() {
let time = userDefaults.object(forKey: "TIME_KEY")
if(time as? Double == ONE_HOUR_KEY) {
timeSelection.selectedSegmentIndex = 0
let userDefaults = UserDefaults.standard
userDefaults.set(60.0, forKey: "TIME_KEY")
view.backgroundColor = UIColor.white
save()
}
else if(time as? Double == THREE_HOUR_KEY) {
timeSelection.selectedSegmentIndex = 1
let userDefaults = UserDefaults.standard
userDefaults.set(120.0, forKey: "TIME_KEY")
view.backgroundColor = UIColor.gray
save()
}
else if(time as? Double == SIX_HOUR_KEY) {
timeSelection.selectedSegmentIndex = 2
let userDefaults = UserDefaults.standard
userDefaults.set(300.0, forKey: "TIME_KEY")
view.backgroundColor = UIColor.darkGray
save()
}
}
func save() {
if let savedData = try? NSKeyedArchiver.archivedData(withRootObject: clock, requiringSecureCoding: false){
let defaults = UserDefaults.standard
defaults.set(savedData, forKey: "TIME_KEY")
}
}
#IBAction func selectTimeOfQuotes(_ sender: Any) {
switch timeSelection.selectedSegmentIndex
{
case 0:
userDefaults.set(60.0, forKey: "TIME_KEY")
save()
case 1:
userDefaults.set(120.0, forKey: "TIME_KEY")
save()
case 2:
userDefaults.set(300.0, forKey: "TIME_KEY")
save()
default:
userDefaults.set(60.0, forKey: "TIME_KEY")
save()
}
updateTime()
}
}
...
Here is the code for my view controller to where I call the user defaults, I placed let userDefaults = UserDefaults.standard in my ViewDidLoad :
'''Code''' ```
func configureAlerts() {
let center = UNUserNotificationCenter.current()
center.removeAllDeliveredNotifications()
center.removeAllPendingNotificationRequests()
let listQuotes = quotes
let i = 1
let content = UNMutableNotificationContent()
content.title = “Inspire”
content.body = listQuotes[i].shareMessage
content.sound = UNNotificationSound.default
let alertDate = Date().byAdding(days: i)
var alertComponents = Calendar.current.dateComponents([.day, .month, .year], from: alertDate)
alertComponents.hour = 8
let userDefaults = UserDefaults.standard
typealias NSTimeInterval = Double
let thisTime:TimeInterval = userDefaults.double(forKey: "TIME_KEY")
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: thisTime, repeats: true)
let uuidString = UUID().uuidString
let request = UNNotificationRequest(identifier: uuidString, content: content, trigger: trigger)
center.add(request) { error in
if let error = error {
print(error.localizedDescription)
}
}
You are not showing how your Models are connected so we can't tell where the miscommunication is happening or maybe that is the issue. They are not connected.
But at a simple glance you are not rescheduling the notifications. selectTimeOfQuotes, save or updateTime do not call configureAlerts.
Something to note you have a lot of repeating code and hardcoded values that could be the source of the confusion.
BTW 120 is 2 hours not 3 idk if that is on purpose but it highlights my next point.
When you change a value you only want to do it in 1 place; if possible; so centralizing the models will help you avoid having to change things in multiple places.
For the options for your picker an enum can hold everything.
enum NotificationInterval: Double, CaseIterable, Codable{
case ONE_HOUR_KEY = 3660 //TimeInterval == seconds
case THREE_HOUR_KEY = 10800 //TimeInterval == seconds
case SIX_HOUR_KEY = 21600 //TimeInterval == seconds
func label() -> String{
var result = ""
switch self {
case .ONE_HOUR_KEY:
result = "1 hour"
case .THREE_HOUR_KEY:
result = "3 hours"
case .SIX_HOUR_KEY:
result = "6 hours"
}
return result
}
func color() -> UIColor{
var result = UIColor.label
switch self {
case .ONE_HOUR_KEY:
result = UIColor.white
case .THREE_HOUR_KEY:
result = UIColor.gray
case .SIX_HOUR_KEY:
result = UIColor.darkGray
}
return result
}
///Key for storage of user selected interval
static var userDefaultKey: String{
"TIME_KEY"
}
///Saves value to store using the `userDefaultKey`
func saveToStore(){
var mgr = UserDefaultManager()
mgr.intervalTime = self
}
///Gets value from store using the `userDefaultKey`
static func getFromStore() -> NotificationInterval{
let raw = UserDefaultManager().intervalTime
return raw
}
///Gets the index for the object in the `allCases` array
func getAllCasesIndex() -> Int?{
NotificationInterval.allCases.firstIndex(where: {
self == $0
})
}
///Gets the index for the `userDefaultKey` stored object in the `allCases` array
static func getStoredIndex() -> Int?{
NotificationInterval.getFromStore().getAllCasesIndex()
}
}
Then since you have at least 2 unrelated classes that use the value store in user defaults you can centralize that work too
///This stores and retreives userdefaults to a predetermined store
struct UserDefaultManager{
//Having a single location for this will simplify UserDefault storage
//A use case would be switching to an App Group store when you decide to support watch in the future or if you want to add Widgets
private let store = UserDefaults.standard
///User selected interval for the notifications
var intervalTime: NotificationInterval{
get{
getObject(forKey: NotificationInterval.userDefaultKey, type: NotificationInterval.self) ?? NotificationInterval.ONE_HOUR_KEY
}
set{
save(newValue, forKey: NotificationInterval.userDefaultKey)
}
}
///Saves any Codable to UserDefaults
func save<T: Codable>(_ object: T, forKey: String){
let encoder = JSONEncoder()
do{
let encoded = try encoder.encode(object)
store.set(encoded, forKey: forKey)
}catch{
print(error)
}
}
//Gets any Codable from UserDefaults
func getObject<T: Codable>(forKey: String, type: T.Type) -> T?{
guard let saved = store.object(forKey: forKey) as? Data else {
return nil
}
let decoder = JSONDecoder()
do{
let loaded = try decoder.decode(T.self, from: saved)
return loaded
}catch{
print(error)
return nil
}
}
}
Then your SettingsViewController will look like this
class SettingsViewController: UIViewController {
///Programatic use of IBOutlet
var timeSelection: UISegmentedControl!
private let quoteManager = QuoteManager()
override func viewDidLoad() {
super.viewDidLoad()
//Create control PS I dont have a storyboard setup but you can replace this with your IBOutlet and IBAction
timeSelection = UISegmentedControl(items: NotificationInterval.allCases.map({
$0.label()
}))
timeSelection.addTarget(self, action: #selector(selectTimeOfQuotes), for: .allEvents)
//Set the initial value from storage
timeSelection.selectedSegmentIndex = NotificationInterval.getStoredIndex() ?? 0
self.view.addSubview(timeSelection)
timeSelection.translatesAutoresizingMaskIntoConstraints = false
timeSelection.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
timeSelection.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
//End of programatic setup
//Set the color from storage
view.backgroundColor = NotificationInterval.getFromStore().color()
}
///Programatic use of IBAction
#objc
func selectTimeOfQuotes() {
//Identify the selected interval
let interval = NotificationInterval.allCases[timeSelection.selectedSegmentIndex]
//Save it
interval.saveToStore()
//Change the color
view.backgroundColor = interval.color()
//Change the notification
quoteManager.rescheduleQuotes()
}
}
As the last line of code shows once all the work is done you should reschedule the quotes.
I created a mini-QuoteManager since you do not show this connection. This manager can be used by any View Controller to get the quotes and maybe even reschedule when the quotes change by calling the provided method.
//Adapt this to your use case this is just a sample
///Liason for quote Storege
struct QuoteManager{
var listQuotes = ["one", "two", "three"]
private let notificationManager = NotificationManager.shared
private let userDefaultsManager = UserDefaultManager()
///Reschedules quotes
func rescheduleQuotes(count: Int = 10){
let title = "Inspire"
notificationManager.deleteNotifications()
print(#function)
for n in 1..<count+1{
print(n)
let newDate = userDefaultsManager.intervalTime.rawValue*Double(n)
//Idenfier must be unique so I added the n
notificationManager.scheduleUNTimeIntervalNotificationTrigger(title: title, body: listQuotes.randomElement()!, timeInterval: newDate, identifier: "com.yourCompany.AppName.\(title)_\(n.description)")
}
}
}
The QuoteManager calls the NotificationManager. I created a small version below.
class NotificationManager: NSObject, UNUserNotificationCenterDelegate{
//Singleton is requierd because of delegate
static let shared: NotificationManager = NotificationManager()
let notificationCenter = UNUserNotificationCenter.current()
private override init(){
super.init()
//This assigns the delegate
notificationCenter.delegate = self
requestAuthorization()
}
func scheduleUNTimeIntervalNotificationTrigger(title: String, body: String, timeInterval: TimeInterval, identifier: String, repeats: Bool = false){
print(#function)
let content = UNMutableNotificationContent()
content.title = title
content.body = body
content.sound = .default
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInterval, repeats: repeats)
let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
notificationCenter.add(request) { (error) in
if error != nil {
print(error!)
}
self.printNotifications()
}
}
func requestAuthorization() {
print(#function)
notificationCenter.requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in
if granted {
print("Access Granted!")
} else {
print("Access Not Granted")
}
}
}
func deleteNotifications(){
print(#function)
notificationCenter.removeAllPendingNotificationRequests()
notificationCenter.removeAllDeliveredNotifications()
}
///Prints to console schduled notifications
func printNotifications(){
print(#function)
notificationCenter.getPendingNotificationRequests { request in
print("UNTimeIntervalNotificationTrigger Pending Notification")
for req in request{
if req.trigger is UNTimeIntervalNotificationTrigger{
print((req.trigger as! UNTimeIntervalNotificationTrigger).nextTriggerDate()?.description ?? "invalid next trigger date")
print(req.content.body)
}
}
print("UNCalendarNotificationTrigger Pending Notification")
for req in request{
if req.trigger is UNCalendarNotificationTrigger{
print((req.trigger as! UNCalendarNotificationTrigger).nextTriggerDate()?.description ?? "invalid next trigger date")
}
}
}
}
//MARK: UNUserNotificationCenterDelegate
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler(.banner)
}
}
It might seem like a lot but if you focus on the SettingsViewController you will see how much simpler the whole thing becomes.
All this is working code. Just copy and paste into a .swift file.
You might have to change the UISegmentedControl since I created it programmatically but if you put the SettingsViewController in a blank storyboard it should work as is.
I have a situation where a string returned from a function call is being assigned to a UILabel text. However, the UILabel is carrying an empty value. If I were to assign a static string viz. "this is testing" to the UILabel directly it works. Within the function, I can print the return value
import Foundation
import Firebase
import UIKit
class checkLocation{
var items = [addedItems]()
func getLocationOfItem(textFieldText: (String)) -> String{
let itemLet = addedItems()
var location = ""
Database.database().reference().child("item").observe(.childAdded, with: { (snapshot) in
if let dictionary = snapshot.value as? [String: AnyObject]{
//itemLet.setValuesForKeys(dictionary)
itemLet.itemName = dictionary["itemName"] as? String
itemLet.itemLocation = dictionary["itemLocation"] as? String
itemLet.itemImageUrl = dictionary["itemImageUrl"] as? String
itemLet.itemTS = dictionary["itemTS"] as? String
itemLet.id = dictionary["id"] as? String
if(textFieldText == itemLet.itemName){
location = itemLet.itemLocation!
print(location)
}
}
}, withCancel: nil)
return location
}
}
Calling program
import UIKit
import Firebase
class checkLocationViewController: ViewController {
#IBOutlet weak var itemNameInLctn: UITextField!
#IBOutlet weak var itemLocationLbl: UILabel!
var items = [addedItems]()
var strLocation = "";
override func viewDidLoad() {
super.viewDidLoad()
refItems = Database.database().reference().child("item")
}
#IBAction func getLocation(_ sender: UIButton) {
self.strLocation = checkLocation().getLocationOfItem(textFieldText: itemNameInLctn.text!)
itemLocationLbl.text = strLocation
//itemLocationLbl.text = strLocation
//print(itemNameInLctn.text)
}
}
Any help?
The func getLocationOfItem(textFieldText: (String)) -> String is correctly returning location that has the initial value of "“.
The issue that you are facing is that, you are calling an an async task from firebase within a sync function call.
You can refactor the method call to return you the required string asynchronously be making the following changes:
func getLocationOfItem(textFieldText: String, completion: #escaping (_ itemLocation: String?) -> Void){
let itemLet = addedItems()
Database.database().reference().child("item").observe(.childAdded, with: { (snapshot) in
guard let dictionary = snapshot.value as? [String: AnyObject] else {
return completion(nil)
}
itemLet.itemName = dictionary["itemName"] as? String
itemLet.itemLocation = dictionary["itemLocation"] as? String
itemLet.itemImageUrl = dictionary["itemImageUrl"] as? String
itemLet.itemTS = dictionary["itemTS"] as? String
itemLet.id = dictionary["id"] as? String
if(textFieldText == itemLet.itemName){
completion(itemLet.itemLocation)
} else {
completion(nil)
}
}, withCancel: nil)
}
/// Usage
#IBAction func getLocation(_ sender: UIButton) {
guard let itemNameInLocation = itemNameInLctn.text else { return }
getLocationOfItem(textFieldText: itemNameInLocation) { [weak self] (itemLocation) in
self?.strLocation = itemLocation
self?.itemLocationLbl.text = itemLocation
}
}
Note:
Please be advised that the completion handler will be called every time that a value is added under the item path in your firebase database.
I would highly recommend refactoring further in this case to use the observeSingleEventthat firebase provides.
Please see link below for documentation about said method:
https://firebase.google.com/docs/database/ios/read-and-write#read_data_once
If this was your intention then its the best choice.
I have gameCenterButton in VC1. Its purpose is to take the user to Game Center's Leaderboards where they can see High Scores. If the user decides to authenticate with Game Center, then I want to change gameCenterButton's state (un-grey and enable). In my GameKitHelper class I have these:
func authenticateLocalPlayer() {
GKLocalPlayer.local.authenticateHandler =
{ (viewController, error) in
self.gameCenterEnabled = false
if viewController != nil {
self.authenticationViewController = viewController
NotificationCenter.default.post(name: NSNotification.Name(
GameKitHelper.PresentAuthenticationViewController),
object: self)
} else if GKLocalPlayer.local.isAuthenticated {
self.gameCenterEnabled = true
}
}
}
extension GameKitHelper: GKGameCenterControllerDelegate {
func gameCenterViewControllerDidFinish(_ gameCenterViewController: GKGameCenterViewController) {
gameCenterViewController.dismiss(animated: true, completion: nil)
}
}
In VC1 I have this:
#IBOutlet weak var gameCenterButton: UIButton!
#IBAction func gameCenter(_ sender: UIButton) {
GameKitHelper.sharedInstance.showGKGameCenterViewController(viewController: self)
}
I'm thinking that inside of extension GameKitHelper I can do ...
if gameCenterEnabled == true {
gameCenterButton.isEnabled = true // How do I allow for this?
gameCenterButton.alpha = 1 // How do I allow for this?
How do I allow gameCenterButton state to change outside of it's class. Is there something I need to do in AppDelegate?
Put var gameCenterEnabled = false outside (above) of your GameKitHelper class, thus making it "global". You will likely be prompted to remove the self. in self.gameCenterEnabled = false and in self.gameCenterEnabled = true. Do so.
Now, you can reference gameCenterEnabled in VC1's class and change gameCenterButton's state like this:
// code to determine gameCenterButton's state based on gameCenterEnabled's status
if gameCenterEnabled == false {
self.gameCenterButton.isEnabled = false
self.gameCenterButton.alpha = 0.37
} else {
self.gameCenterButton.isEnabled = true
self.gameCenterButton.alpha = 1
}
In my app I have a function where I want it to print something depending on the current view controller that is loaded. I do this by setting a global variable (Bool) and then toggling the flags in the view controller classes. From my main class I have something like this:
var FirstViewControllerisVisible: Bool = false
var SecondViewControllerisVisible: Bool = false
var ThirdViewControllerisVisible: Bool = false
#objc func PlayAgainfunc(_ sender: Any) {
if counter % 15 == 0 {
if FirstViewControllerisVisible == true {
print("First View Controller is visible")
} else if SecondViewControllerisVisible == true {
print("Second View Controller is visible")
} else if ThirdViewControllerisVisible == true {
print("Third View Controller is visible")
}
}
counter += 1
}
Then, in those classes I can set the flags like this:
override func viewDidAppear(_ animated: Bool) {
FirstViewControllerisVisible = true
}
override func viewDidDisappear(_ animated: Bool) {
FirstViewControllerisVisible = false
}
This worked great when it was exclusively Swift, but the problem with global variables is that they can't be accessed by Objective-C. I can't find a way to set flags in my ObjC classes and then check if true or false. For instance, If I tried:
- (void)viewDidAppear:(BOOL)animated; {
[(FirstViewControllerisVisible) == true];
}
- (void)viewDidDisappear:(BOOL)animated; {
[(FirstViewControllerisVisible) == false];
}
I would get the error 'use of undeclared identifier' because my global vars declared in Swift are Swift only.
After the view controller has loaded, you can
if let viewController = UIApplication.shared.keyWindow?.rootViewController {
print(type(of: viewController))
}
add below mentioned extension. you will get the desired result.
extension UIApplication {
/// will return currently showing view controller
static var topMostViewController: UIViewController? {
return UIApplication.shared.keyWindow?.rootViewController?.visibleViewController
}
}
extension UIViewController {
/// The visible view controller from a given view controller
var visibleViewController: UIViewController? {
if let navigationController = self as? UINavigationController {
return navigationController.topViewController?.visibleViewController
} else if let tabBarController = self as? UITabBarController {
return tabBarController.selectedViewController?.visibleViewController
} else if let presentedViewController = presentedViewController {
return presentedViewController.visibleViewController
} else {
return self
}
}
}
and access it like:
let viewController = UIApplication.topMostViewController
Happy Coding
In Objective-C you would do something along the lines of
- (BOOL)isEqual:(id)other {
if (other == self)
return YES;
if (!other || ![other isKindOfClass:[self class]])
return NO;
return [self.customProperty isEqual:other.customProperty];
}
My first naive attempt in swift goes as follows
func isEqual(other: AnyObject) -> Boolean {
if self === other {
return true
}
if let otherTyped = other as? MyType {
return self.myProperty == otherTyper.myProperty
}
return false
}
But I'm far from being happy with it. I don't even know whether the signature is right or whether we're supposed to use anything different than isEqual.
Any thoughts?
EDIT:
I'd also like to keep Objective-C compatibility (my class is used in both legacy Obj-C code and new Swift code). So I think only overriding == isn't enough. Am I wrong?
Yes, you need to override isEqual (and hash) to make your objects fully Objective-C compatible. Here's a Playground-ready example for the syntax:
import Foundation
class MyClass: NSObject {
var value = 5
override func isEqual(object: AnyObject?) -> Bool {
if let object = object as? MyClass {
return value == object.value
} else {
return false
}
}
override var hash: Int {
return value.hashValue
}
}
var x = MyClass()
var y = MyClass()
var set = NSMutableSet()
x.value = 10
y.value = 10
set.addObject(x)
x.isEqual(y) // true
set.containsObject(y) // true
(syntax current as of Xcode 6.3)
You could also implement a custom equatable, for instance:
func == (lhs: CustomClass, rhs: CustomClass) -> Bool {
return lhs.variable == rhs.variable
}
This will allow you to simply check equality like this:
let c1: CustomClass = CustomClass(5)
let c2: CustomClass = CustomClass(5)
if c1 == c2 {
// do whatever
}
Be sure your custom equatable is outside the class scope!
swift3 sig:
open override func isEqual(_ object: Any?) -> Bool {
guard let site = object as? PZSite else {
return false
}
....
}
In Swift you can override infix operators (and even make your own). See here.
So rather than using isEqual you could do:
myType == anotherType
One more example
public class PRSize: NSObject {
public var width: Int
public var height: Int
public init(width: Int, height: Int) {
self.width = width
self.height = height
}
static func == (lhs: PRSize, rhs: PRSize) -> Bool {
return lhs.width == rhs.width && lhs.height == rhs.height
}
override public func isEqual(_ object: Any?) -> Bool {
if let other = object as? PRSize {
if self === other {
return true
} else {
return self.width == other.width && self.height == other.height
}
}
return false
}
override public var hash : Int {
return "\(width)x\(height)".hashValue
}
}
To archive Objective-C compatibility you have to override isEqual method as described on page 16 of this document: https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/BuildingCocoaApps/BuildingCocoaApps.pdf