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只是很快就想詢問我的一個小問題，試圖在我的快速應用程序的啓動屏幕中播放音效。我更加感到困惑 - 我在哪裏宣佈我的AVAudio播放器（在我的視圖控制器或Appdelegate中）;但兩種方法都沒有成功。這裏就是我目前我的appDelegate文件Xcode - Swift;添加聲音效果發射屏幕
import UIKit
import AVFoundation
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var audioPlayer = AVAudioPlayer()
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window!.backgroundColor = UIColor(red: 9/255, green: 4/255, blue: 68/255, alpha: 1)
self.window!.makeKeyAndVisible()
// rootViewController from StoryBoard
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let navigationController = mainStoryboard.instantiateViewController(withIdentifier: "navigationController")
self.window!.rootViewController = navigationController
// logo mask
navigationController.view.layer.mask = CALayer()
navigationController.view.layer.mask!.contents = UIImage(named: "logo.png")!.cgImage
navigationController.view.layer.mask!.bounds = CGRect(x: 0, y: 0, width: 60, height: 60)
navigationController.view.layer.mask!.anchorPoint = CGPoint(x: 0.5, y: 0.5)
navigationController.view.layer.mask!.position = CGPoint(x: navigationController.view.frame.width/2, y: navigationController.view.frame.height/2)
// logo mask background view
let maskBgView = UIView(frame: navigationController.view.frame)
maskBgView.backgroundColor = UIColor.white
navigationController.view.addSubview(maskBgView)
navigationController.view.bringSubview(toFront: maskBgView)
// logo mask animation
let transformAnimation = CAKeyframeAnimation(keyPath: "bounds")
transformAnimation.delegate = self as? CAAnimationDelegate
transformAnimation.duration = 1
transformAnimation.beginTime = CACurrentMediaTime() + 1 //add delay of 1 second
let initalBounds = NSValue(cgRect: (navigationController.view.layer.mask!.bounds))
let secondBounds = NSValue(cgRect: CGRect(x: 0, y: 0, width: 50, height: 50))
let finalBounds = NSValue(cgRect: CGRect(x: 0, y: 0, width: 2000, height: 2000))
transformAnimation.values = [initalBounds, secondBounds, finalBounds]
transformAnimation.keyTimes = [0, 0.5, 1]
transformAnimation.timingFunctions = [CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut), CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)]
transformAnimation.isRemovedOnCompletion = false
transformAnimation.fillMode = kCAFillModeForwards
navigationController.view.layer.mask!.add(transformAnimation, forKey: "maskAnimation")
// logo mask background view animation
UIView.animate(withDuration: 0.1,
delay: 1.35,
options: UIViewAnimationOptions.curveEaseIn,
animations: {
maskBgView.alpha = 0.0
},
completion: { finished in
maskBgView.removeFromSuperview()
})
// root view animation
UIView.animate(withDuration: 0.25,
delay: 1.3,
options: UIViewAnimationOptions(),
animations: {
self.window!.rootViewController!.view.transform = CGAffineTransform(scaleX: 1.05, y: 1.05)
},
completion: { finished in
UIView.animate(withDuration: 0.3,
delay: 0.0,
options: UIViewAnimationOptions(),
animations: {
self.window!.rootViewController!.view.transform = CGAffineTransform.identity
},
completion: nil
)
do {
self.audioPlayer = try AVAudioPlayer(contentsOf: URL.init(fileURLWithPath: Bundle.main.path(forResource: "startup", ofType: "wav")!))
self.audioPlayer.prepareToPlay()
}
catch {
print(error)
}
})
return true
}
func applicationWillResignActive(_ application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}
func applicationDidEnterBackground(_ application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(_ application: UIApplication) {
// Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(_ application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(_ application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}