Xcode - Swift;为启动屏幕添加音效
Xcode - Swift; adding sound effects to launch screen
我很快就想询问一个小问题，我试图在我的 swift 应用程序的启动屏幕中播放音效。对于我打算在哪里声明我的 AVAudio 播放器（在我的视图控制器或 Appdelegate 中），我感到更加困惑；但是这两种方法都没有成功。这是我目前在我的 appDelegate 文件中得到的内容
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:.
}
}
我更喜欢使用的方法是声明
var audioPlayer = AVAudioPlayer()
在 AppDelegate 中（就像您在代码中所做的那样）。
并且有播放音频的方法
func playSound(file:String, ext:String) -> Void {
do {
let url = URL.init(fileURLWithPath: Bundle.main.path(forResource: file, ofType: ext)!)
audioPlayer = try AVAudioPlayer(contentsOf: url)
audioPlayer.prepareToPlay()
audioPlayer.play()
} catch let error {
NSLog(error.localizedDescription)
}
}
这样你就可以调用
playSound(file: "startup", ext: "wav")
随时随地在您的应用程序中播放此声音（以及其他声音），代码重复最少。
当我想在启动时进行握手呼叫时，我遇到了一些类似的问题。但是根据Apple UX，用户应该能够尽快登陆。
启动屏幕之前准备您的视图和应用程序。我们无法控制它。
但是如果我们不在着陆视图控制器中执行太多繁重的任务或在单独的线程中执行这些任务，则可以减少启动屏幕时间。这样可以减少启动屏幕时间。
要实现这种音效，您可以制作初始 VC 并调用复制与启动屏幕相同的 UI，这样过渡就不会可见。在那里，您可以在 viewDidLoad() 或 viewDidAppear(animated:Bool)
中执行音频内容
我很快就想询问一个小问题，我试图在我的 swift 应用程序的启动屏幕中播放音效。对于我打算在哪里声明我的 AVAudio 播放器（在我的视图控制器或 Appdelegate 中），我感到更加困惑；但是这两种方法都没有成功。这是我目前在我的 appDelegate 文件中得到的内容
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:.
}
}
我更喜欢使用的方法是声明
var audioPlayer = AVAudioPlayer()
在 AppDelegate 中（就像您在代码中所做的那样）。
并且有播放音频的方法
func playSound(file:String, ext:String) -> Void {
do {
let url = URL.init(fileURLWithPath: Bundle.main.path(forResource: file, ofType: ext)!)
audioPlayer = try AVAudioPlayer(contentsOf: url)
audioPlayer.prepareToPlay()
audioPlayer.play()
} catch let error {
NSLog(error.localizedDescription)
}
}
这样你就可以调用
playSound(file: "startup", ext: "wav")
随时随地在您的应用程序中播放此声音（以及其他声音），代码重复最少。
当我想在启动时进行握手呼叫时，我遇到了一些类似的问题。但是根据Apple UX，用户应该能够尽快登陆。
启动屏幕之前准备您的视图和应用程序。我们无法控制它。 但是如果我们不在着陆视图控制器中执行太多繁重的任务或在单独的线程中执行这些任务，则可以减少启动屏幕时间。这样可以减少启动屏幕时间。
要实现这种音效，您可以制作初始 VC 并调用复制与启动屏幕相同的 UI，这样过渡就不会可见。在那里，您可以在 viewDidLoad() 或 viewDidAppear(animated:Bool)