(noob to iOS) When I launch my app it shows the launch screen for a brief moment than it goes to a black screen. Apparently a lot of ppl have this error just cant find a fix that works for me
I ensured my storyboard was my main interface and tried to clean the project
I have only one view controller and one view
along with the app and scene delegate files
any suggestions ?
AppDelegate.swift:
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
return true
}
// MARK: UISceneSession Lifecycle
func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
// Called when a new scene session is being created.
// Use this method to select a configuration to create the new scene with.
return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
}
func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
// Called when the user discards a scene session.
// If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
// Use this method to release any resources that were specific to the discarded scenes, as they will not return.
}
}
SceneDelegate.swift:
import UIKit
import SwiftUI
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
var window: UIWindow?
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
// Create the SwiftUI view that provides the window contents.
let contentView = ButtonScreen()
// Use a UIHostingController as window root view controller.
if let windowScene = scene as? UIWindowScene {
let window = UIWindow(windowScene: windowScene)
window.rootViewController = contentView
self.window = window
window.makeKeyAndVisible()
}
}
func sceneDidDisconnect(_ scene: UIScene) {
// Called as the scene is being released by the system.
// This occurs shortly after the scene enters the background, or when its session is discarded.
// Release any resources associated with this scene that can be re-created the next time the scene connects.
// The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
}
func sceneDidBecomeActive(_ scene: UIScene) {
// Called when the scene has moved from an inactive state to an active state.
// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
}
func sceneWillResignActive(_ scene: UIScene) {
// Called when the scene will move from an active state to an inactive state.
// This may occur due to temporary interruptions (ex. an incoming phone call).
}
func sceneWillEnterForeground(_ scene: UIScene) {
// Called as the scene transitions from the background to the foreground.
// Use this method to undo the changes made on entering the background.
}
func sceneDidEnterBackground(_ scene: UIScene) {
// Called as the scene transitions from the foreground to the background.
// Use this method to save data, release shared resources, and store enough scene-specific state information
// to restore the scene back to its current state.
}
}
View Controller:
import MediaPlayer
class ButtonScreen: UIViewController {
var musicPlayer = MPMusicPlayerController.applicationMusicPlayer
override func viewDidLoad() {
super.viewDidLoad()
}
@IBAction func stopButtonTapped(_ sender: UIButton) {
musicPlayer.stop()
}
@IBAction func nextButtonTapped(_ sender: UIButton) {
musicPlayer.skipToNextItem()
}
@IBAction func previousButtonTapped(_ sender: UIButton) {
musicPlayer.skipToPreviousItem()
}
@IBAction func musicButtonTapped(_ sender: UIButton) {
MPMediaLibrary.requestAuthorization {(status) in
if status == .authorized{
self.playArtist(artist: sender.currentTitle!)
}
}
playArtist(artist: sender.currentTitle!)
}
func playArtist (artist: String){
musicPlayer.stop();
let query = MPMediaQuery()
let predicate = MPMediaPropertyPredicate(value: artist, forProperty: MPMediaItemPropertyArtist)
query.addFilterPredicate(predicate)
musicPlayer.setQueue(with: query)
musicPlayer.shuffleMode = .songs
musicPlayer.play()
}
}
