I'm curious how to add functionality to the next/previous buttons. I have more .mp3 files in my project, but I'm not sure how to set the button functions to click through them. I think I need to set a variable and call the viewdidload() function inside the button function. I am just not 100% certain how to do that.
Noob here, be nice. :)
var player = AVAudioPlayer()
var timer = Timer()
#objc func updateScrubber(){
scrubber.value = Float(player.currentTime)
}
#IBAction func play(_ sender: Any) {
player.play()
timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(ViewController.updateScrubber), userInfo: nil, repeats: true)
}
#IBAction func pause(_ sender: Any) {
player.pause()
}
#IBAction func previous(_ sender: Any) {
}
#IBAction func next(_ sender: Any) {
}
#IBAction func sliderMoved(_ sender: Any) {
player.volume = volume.value
}
#IBOutlet weak var volume: UISlider!
#IBAction func scrubberMoved(_ sender: Any) {
player.currentTime = TimeInterval(scrubber.value)
}
#IBOutlet weak var scrubber: UISlider!
override func viewDidLoad() {
super.viewDidLoad()
let audioPath = Bundle.main.path(forResource: "threatofjoy", ofType: "mp3")
do {
try player = AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath! ))
scrubber.maximumValue = Float(player.duration)
} catch {
print("Error")
}
I solved this by placing the songs in an array and creating a current song function to call in the button methods.
Related
I have 2 ViewControllers.
TimerViewController passes a variable to the EditTimerViewConroller. EditTimerViewConroller edits it and should pass it back, but it looks like code in .completion is not executed.
Any advice how to fix it?
My code is:
TimerViewController
import UIKit
import AVFoundation //play sounds
class TimerViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
var player: AVAudioPlayer!
var timer = Timer()
var totalTime = 10.0
var secondsRemaining = 10.0
var secondsPassed = 0.0
let timerStep = 0.1
#IBOutlet weak var timerLabel: UILabel!
#IBOutlet weak var progressBar: UIProgressView!
#IBAction func startPressed(_ sender: UIButton) {
//works fine
}
#IBAction func editTimerButtinPresed(_ sender: UIButton) {
self.performSegue(withIdentifier: "goToEditTimer", sender: self)
let editTimer = EditTimerViewController()
editTimer.completion = { [weak self] duration in
DispatchQueue.main.async {
self?.totalTime = Double(duration!)
print("editTimer completed, totalTime now is \(self?.totalTime)")
}
}
}
func playSound(fileName: String) {
//works fine
}
#objc func updateTimer() {
//works fine
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToEditTimer" {
let destinationVC = segue.destination as! EditTimerViewController
destinationVC.duration = Int(totalTime)
print("Pasing duration = \(totalTime) to Edit screen")
}
}
EditTimerViewController
import UIKit
class EditTimerViewController: UIViewController {
let maxDuration = 60
var duration: Int? //timer duraton is passed from Timer
public var completion: ((Int?) -> Void)?
override func viewDidLoad() {
super.viewDidLoad()
durationSlider.minimumValue = 0
durationSlider.maximumValue = Float(maxDuration)
durationSlider.value = Float(duration!)
durationLabel.text = String(duration!) + "s"
}
#IBOutlet weak var durationLabel: UILabel!
#IBOutlet weak var durationSlider: UISlider!
#IBAction func durationSliderChanged(_ sender: UISlider) {
duration = Int(sender.value)
print(duration!)
durationLabel.text = String(duration!) + "s"
}
#IBAction func cancelPressed(_ sender: UIButton) {
print("Cancel pressed, dismissing Edit screen")
self.dismiss(animated: true, completion: nil)
}
#IBAction func savePressed(_ sender: UIButton) {
print("Save pressed, duration is \(duration!)")
completion?(duration!)
self.dismiss(animated: true, completion: nil)
}
}
In the output after pressing Save button I see
Save pressed, duration is 11
but after it there is no sign of
editTimer completed, totalTime now is 11
and timer duration never changes
Change
#IBAction func editTimerButtinPresed(_ sender: UIButton) {
self.performSegue(withIdentifier: "goToEditTimer", sender: self)
let editTimer = EditTimerViewController()
editTimer.completion = { [weak self] duration in
DispatchQueue.main.async {
self?.totalTime = Double(duration!)
print("editTimer completed, totalTime now is \(self?.totalTime)")
}
}
}
To
#IBAction func editTimerButtinPresed(_ sender: UIButton) {
self.performSegue(withIdentifier: "goToEditTimer", sender: self)
}
And move completion inside prepare
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToEditTimer" {
let destinationVC = segue.destination as! EditTimerViewController
destinationVC.duration = Int(totalTime)
print("Pasing duration = \(totalTime) to Edit screen")
destinationVC.completion = { [weak self] duration in
DispatchQueue.main.async {
self?.totalTime = Double(duration!)
print("editTimer completed, totalTime now is \ (self?.totalTime)")
}
}
}
}
So I'm trying to make a Chess Time app, where both players have access to a clock and they change the time between bullet(3minutes), Blitz(5minutes), and Rapid(10Minutes). Well in my second view controller SettingsController I made 3 IBActions UIButtons for this.
#IBAction func bulletPressed(_ sender: UIButton) {
var storedTime = bullet
self.delegate?.storedTimeTimer()
self.navigationController?.popViewController(animated: true)
}
#IBAction func blitzPressed(_ sender: UIButton) {
var storedTime = blitz
}
#IBAction func rapidPressed(_ sender: UIButton) {
var storedTime = rapid
}
This is my SettingsController, my whole point is trying to get the storedTime into the first controller. I tried to use a delegate, but I couldn't get it to work.
Here is the full First Controller:
import UIKit
class ChessTimer: UIViewController {
#IBOutlet weak var playerTimer1: UILabel!
#IBOutlet weak var playerTimer2: UILabel!
var timer = Timer()
var time = 10
var isTimerRunning = false
override func viewDidLoad() {
super.viewDidLoad()
if isTimerRunning == false {
runTimer()
}
}
#IBAction func restartButton(_ sender: UIButton) {
}
#IBAction func pausePressed(_ sender: UIButton) {
timer.invalidate()
}
#IBAction func settingsPressed(_ sender: UIButton) {
performSegue(withIdentifier: "goToSettings", sender: self)
}
func runTimer() {
timer = Timer.scheduledTimer(timeInterval: 1, target: self,selector:
(#selector(ChessTimer.updateTimer)),userInfo: nil, repeats: true)
isTimerRunning = true
}
#objc func updateTimer() {
if storedTime! < 1 {
timer.invalidate()
playerTimer1.text = "00:00"
playerTimer2.text = "00:00"
}
else {
storedTime! -= 1
playerTimer1.text = prodTimeString(time: TimeInterval(storedTime)!)
}
}
func prodTimeString(time: TimeInterval) -> String {
let prodMinutes = Int(time) / 60 % 60
let prodSeconds = Int(time) % 60
return String(format: "%02d:%02d", prodMinutes, prodSeconds)
}
#IBAction func playerButton1(_ sender: UIButton) {
}
#IBAction func playerButton2(_ sender: UIButton) {
}
}
extension ChessTimer: SettingsControllerDelegate {
func storedTimeTimer() {
}
}
This is the second full controller
import UIKit
class SettingsController: UIViewController {
var bullet = "03:00"
var blitz = "05:00"
var rapid = "10:00"
var storedTime = 0
var delegate: SettingsControllerDelegate?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
#IBAction func bulletPressed(_ sender: UIButton) {
var storedTime = bullet
self.delegate?.storedTimeTimer()
self.navigationController?.popViewController(animated: true)
}
#IBAction func blitzPressed(_ sender: UIButton) {
var storedTime = blitz
}
#IBAction func rapidPressed(_ sender: UIButton) {
var storedTime = rapid
}
}
protocol SettingsControllerDelegate {
func storedTimeTimer()
}
This can be achieved using a Constants.swift file.
Click File -> New -> File -> Swift File and then name it Constants.swift.
In Constants.swift, declare var storedTime = 0.
Delete var storedTime = 0 from your view controllers, you'll only need it in Constants.swift. (So delete it from SettingsController, etc.)
The storedTime variable will now be public to all view controllers. 👍
Hope this helps someone!
I have some buttons in first view controller and a webView in second view controller. How to pass different url from different buttons to the webView? For example, the first button will leads to a google website and the second one is Facebook but using the same webView. Do I need to create different segues for each button or just one? If using just one, where should I start pulling that blue line (that line when you hold the control key)?
In first viewController:
class CafesView: UIViewController {
#IBOutlet weak var topBar: UIView!
#IBOutlet weak var button1: MDCFloatingButton!
#IBOutlet weak var button2: MDCRaisedButton!
#IBOutlet weak var button3: MDCRaisedButton!
#IBOutlet weak var button4: MDCRaisedButton!
#IBOutlet weak var button5: MDCRaisedButton!
#IBOutlet weak var button6: MDCRaisedButton!
#IBOutlet weak var button7: MDCRaisedButton!
#IBOutlet weak var button8: MDCRaisedButton!
#IBOutlet weak var button9: MDCRaisedButton!
let cafes = [
"Banana Joe's",
"College Eight Cafe",
"Global Village",
"Iveta",
"Oakes Cafe",
"Perk Coffee Bar",
"Stevenson Coffee House",
"Terra Fresca",
"Vivas"
]
var urlToPass: String!
override func viewDidLoad() {
super.viewDidLoad()
topBar.layer.shadowColor = UIColor.black.cgColor
topBar.layer.shadowOpacity = 0.5
topBar.layer.shadowOffset = CGSize(width: 0, height: 2)
topBar.layer.shadowRadius = 5
button1.layer.cornerRadius = 20
button2.layer.cornerRadius = 20
button3.layer.cornerRadius = 20
button4.layer.cornerRadius = 20
button5.layer.cornerRadius = 20
button6.layer.cornerRadius = 20
button7.layer.cornerRadius = 20
button8.layer.cornerRadius = 20
button9.layer.cornerRadius = 20
}
#IBAction func bananaJoes(_ sender: UIButton) {
urlToPass = "https://dining.ucsc.edu/pdf/banana-joes-menu.pdf"
}
#IBAction func collegeEightCafe(_ sender: UIButton) {
urlToPass = "https://dining.ucsc.edu/pdf/c8-menu.pdf"
}
#IBAction func globalVillage(_ sender: Any) {
urlToPass = "https://www.foodbooking.com/ordering/restaurant/menu?restaurant_uid=d368abee-3ccc-40d7-be7f-3ca5d4cbd513&glfa_cid=1263531392.1571083521&glfa_t=1571083566919"
}
#IBAction func iveta(_ sender: UIButton) {
urlToPass = "https://iveta.com/pages/iveta-ucsc-menu"
}
#IBAction func oakesCafe(_ sender: UIButton) {
urlToPass = "https://dining.ucsc.edu/pdf/oakes-menu-2019-20.pdf"
}
#IBAction func perkCoffeeBar(_ sender: UIButton) {
urlToPass = "https://google.com" //This url is just a placeholder
}
#IBAction func stevensonCoffeeHouse(_ sender: UIButton) {
urlToPass = "https://dining.ucsc.edu/pdf/stevenson-coffee-house-menu.pdf"
}
#IBAction func terraFresca(_ sender: UIButton) {
urlToPass = "https://dining.ucsc.edu/terra-fresca/pdf/terra-fresca-menu.pdf"
}
#IBAction func vivas(_ sender: UIButton) {
urlToPass = "https://dining.ucsc.edu/pdf/vivas-menu.pdf"
}
#IBAction func dismiss(_ sender: UIButton) {
self.dismiss(animated: true, completion: nil)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
super.prepare(for: segue, sender: sender)
guard let destination = segue.destination as? CafesMenu else { return }
destination.detailURL = urlToPass
urlToPass = nil
}
}
In the second one:
import UIKit
import WebKit
class CafesMenu: UIViewController {
#IBOutlet weak var webView: WKWebView!
var detailURL: String?
override func viewDidLoad() {
super.viewDidLoad()
print("URL Requested: \(detailURL)")
}
override func viewWillAppear(_ animated: Bool) {
let url = URL(string: detailURL!)
let request = URLRequest(url: url!)
webView.load(request)
}
#IBAction func dismiss(_ sender: UIBarButtonItem) {
self.dismiss(animated: true, completion: nil)
}
}
What you need to do is use prepareForSegue:sender: to set a property in your destination view controller. prepareForSegue:sender: will be called before your initial view controller segues to any destination view controller. Within this function, we can check which button was pressed and set the appropriate URL in the destination view controller accordingly.
This approach will allow you to use any segue between your buttons and your destination view controller. This means, you simply have to drag the blue line from the buttons to the view controller you want to segue to.
1. Within your storyboard, create a segue between your first view controller and your destination view controller. This is done by holding control, clicking on the first view controller in the interface builder, and dragging over the destination view controller. Then choose a segue type:
Now, select this segue and give it the Identifier "InitialVCToDestinationVC" in the attributes inspector:
2. Make a property called urlToPass of type URL in your initial view controller:
class InitialViewController: UIViewController {
var urlToPass: URL!
#IBAction func googleButtonPressed(_ sender: Any) {
}
#IBAction func facebookButtonPressed(_ sender: Any) {
}
}
3. Make a property called receivedUrl in the destination view controller:
class DestinationViewController: UIViewController {
var receivedUrl: URL!
#IBOutlet var webView: WKWebView!
override func viewDidLoad() {
super.viewDidLoad()
let request = URLRequest(url: receivedUrl)
webView.load(request)
}
}
4. Set the urlToPass depending on which button is pressed and use the prepareForSegue:sender: function to set the destination view controller's url accordingly. Then, make use of performSegue(withIdentifier:sender:) to perform the segue with identifier InitialVCToDestinationVC.
class InitialViewController: UIViewController {
var urlToPass: URL!
#IBAction func googleButtonPressed(_ sender: Any) {
urlToPass = URL(string: "www.google.com")
performSegue(withIdentifier: "InitialVCToDestinationVC", sender: nil)
}
#IBAction func facebookButtonPressed(_ sender: Any) {
urlToPass = URL(string: "www.facebook.com")
performSegue(withIdentifier: "InitialVCToDestinationVC", sender: nil)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
super.prepare(for: segue, sender: sender)
guard let destination = segue.destination as? DestinationViewController else { return }
destination.receivedUrl = urlToPass
urlToPass = nil
}
}
5. (optional) Make use of the shouldPerformSegueWithIdentifier:sender: method within InitialViewController and check whether or not urlToPass is valid. If urlToPass is valid, perform the segue, else present an alert.
class InitialViewController: UIViewController {
...
override func shouldPerformSegue(withIdentifier identifier: String, sender: Any?) -> Bool {
if let urlToPass = urlToPass {
// check if your application can open the NSURL instance
if !UIApplication.shared.canOpenURL(urlToPass) {
let alertController = UIAlertController(title: "Cannot open URL.", message: "This is an invalid URL.", preferredStyle: .alert)
let ok = UIAlertAction(title: "Okay", style: .cancel, handler: nil)
alertController.addAction(ok)
present(alertController, animated: true, completion: nil)
}
return UIApplication.shared.canOpenURL(urlToPass)
}
return false
}
}
End result:
Here's a link to the Xcode project I made the above gif from: https://github.com/ChopinDavid/PrepareForSegue
Try using the following code snippet to pass the urlParameter to second viewcontroller
class FirstViewController: UIViewController{
func googleActionButton() {
let vc = SecondViewController()
vc.urlToOpen = "www.google.com"
self.present(vc, animated: true, completion: nil)
}
func facebookActionButton() {
let vc = SecondViewController()
vc.urlToOpen = "www.facebook.com"
self.present(vc, animated: true, completion: nil)
}
}
class SecondViewController: UIViewController{
var urlToOpen = String()
override func viewDidLoad() {
super.viewDidLoad()
// set webview url to the 'urlToOpen' which you received from FirstViewController
}
}
First of all, create an enum WebURL with all the url cases that you want to open, i.e.
enum WebURL {
case google
case facebook
var url: String {
switch self {
case .google:
return "https://www.google.com"
case .facebook:
return "https://www.facebook.com"
}
}
}
Next, in FirstVC, in the UIButton's #IBAction open SecondVC using the WebURL instance corresponding to that particular button, i.e.
class FirstVC: UIViewController{
#IBAction func openGoogle(_ sender: UIButton) {
self.openSecondVC(with: WebURL.google.url)
}
#IBAction func openFacebook(_ sender: UIButton) {
self.openSecondVC(with: WebURL.facebook.url)
}
func openSecondVC(with urlString: String) {
if let vc = self.storyboard?.instantiateViewController(withIdentifier: "SecondVC") as? SecondVC {
vc.urlString = urlString
self.present(vc, animated: true, completion: nil)
}
}
}
Then, use urlString in SecondVC to configure your webView, i.e.
class SecondVC: UIViewController {
var urlString: String?
override func viewDidLoad() {
super.viewDidLoad()
//Setup your webView using urlString here...
}
}
I have a DispatchQueue for a introViewController that shows a gif for 11 seconds and then display my login page... But also have a button that skip the intro and display the login. When I click it the time still running and when I am navigating in the app goes back to the login when the time ends.
this is my class
class GifClass: UIViewController {
#IBOutlet weak var gifImage: UIImageView!
#IBOutlet weak var skipButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
gifImage.loadGif(name: "promed")
DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(11)) {
self.performSegue(withIdentifier: "introLogin", sender: self)
}
}
#IBAction func skip(_ sender: Any) {
performSegue(withIdentifier: "introLogin", sender: self)
}
}
how do I do to stop the time when I click the button?
For this, you can use a DispatchWorkItem. Here is the reference:
https://developer.apple.com/documentation/dispatch/dispatchworkitem
And here is an example of how you could use it in your code:
class GifClass: UIViewController {
#IBOutlet weak var gifImage: UIImageView!
#IBOutlet weak var skipButton: UIButton!
private var workItem: DispatchWorkItem? // Create a private DispatchWorkItem property
override func viewDidLoad() {
super.viewDidLoad()
gifImage.loadGif(name: "promed")
workItem = DispatchWorkItem { // Set the work item with the block you want to execute
self.performSegue(withIdentifier: "introLogin", sender: self)
}
DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(11), execute: workItem!)
}
#IBAction func skip(_ sender: Any) {
workItem?.cancel() // Cancel the work item in the queue so it doesn't run
performSegue(withIdentifier: "introLogin", sender: self)
}
}
I'm not sure if there are best practices here, but I would consider doing what you are doing with a Timer rather than the DispatchQueue.
class GifClass: UIViewController {
#IBOutlet weak var gifImage: UIImageView!
#IBOutlet weak var skipButton: UIButton!
var timer = Timer()
override func viewDidLoad() {
super.viewDidLoad()
gifImage.loadGif(name: "promed")
timer = Timer.scheduledTimer(timeInterval: 11, target: self, selector: #selector(timerAction), userInfo: nil, repeats: false)
}
#objc func timerAction() {
performSegue(withIdentifier: "introLogin", sender: self)
}
#IBAction func skip(_ sender: Any) {
timer.invalidate()
performSegue(withIdentifier: "introLogin", sender: self)
}
}
You don't stop the queue. Instead, when the task that you dispatched starts executing, it needs to check its context and do the right thing (often: nothing) if the context has changed.
I put some buttons in a game on SpriteKit using Xcode 7 Beta, they stay all the time visible and I wanted to make them invisible when game is started and visible when game is over. I tried with Bool but it won't work because they are in different files (classes). Function to start game and to over it is in GameScene.swift, and functions of buttons are in GameViewController.swift.
Code that I used game to start is:
var isStarted = false
func start() {
isStarted = true
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
if isGameOver {
restart()
} else !isStarted {
start()
So the game starts at touch on screen.
Code that I used game to over is:
var isGameOver = false
func gameOver() {
isGameOver = true
}
And buttons are in GameViewController.swift as sender: UIButton.
#IBAction func facebookShare(sender: UIButton){
let facebookShare : SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
self.presentViewController(facebookShare, animated: true, completion: nil)
}
#IBAction func twitterShare(sender: UIButton) {
let twitterShare : SLComposeViewController = SLComposeViewController(forServiceType: SLServiceTypeTwitter)
self.presentViewController(twitterShare, animated: true, completion: nil)
}
#IBAction func leaderboard(sender: UIButton) {
}
#IBAction func removeAds(sender: UIButton) {
}
As You see I didn't finished two more buttons, anyway I will after this.
I hope You will be helpful because I'm beginner
Ok, below you will find a way how to send an event to any Object that is listening to it....
class ClassWithButtonsInIt: UIViewController {
#IBOutlet weak var buttonOne: UIButton!
#IBOutlet weak var buttonTwo: UIButton!
#IBOutlet weak var buttonThree: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("hideButtonsEvent"), name: "hideButtonsEvent", object: nil)
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
private func hideButtonsEvent (notification: NSNotification) {
buttonOne.hidden = true
buttonTwo.hidden = true
buttonThree.hidden = true
}
}
class ClassWithoutButtonsThatTriggersTheHidingEvent {
private func triggerdFunctionThatHidesButtonsInOtherClass () {
NSNotificationCenter.defaultCenter().postNotificationName("hideButtonsEvent", object: nil)
}
}
EDIT
Yes thats right, sorry I had a little bug in my Code too :-)
Please change this line:
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("hideButtonsEvent"), name: "hideButtonsEvent", object: nil)
To this line (see the double dot behind hideButtonsEvent):
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("hideButtonsEvent:"), name: "hideButtonsEvent", object: nil)
And this line:
private func hideButtonsEvent (notification: NSNotification) {
To this line (delete the private modifier):
func hideButtonsEvent (notification: NSNotification) {