Не показывает корневой viewcontroller после анимации в AppDelegate
Я пытаюсь сделать анимацию в AppDelegate при запуске приложения. (Из этого урока: http://iosdevtips.co/post/88481653818/twitter-ios-app-bird-zoom-animation)
Это мой класс AppDelegate:
import UIKit
import QuartzCore
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var mask: CALayer?
var imageView: UIImageView?
func application(application: UIApplication!, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let imageView = UIImageView(frame: self.window!.frame)
imageView.image = UIImage(named: "Screen")
self.window!.addSubview(imageView)
self.mask = CALayer()
self.mask!.contents = UIImage(named: "twitter logo mask")!.CGImage
self.mask!.bounds = CGRect(x: 0, y: 0, width: 100, height: 100)
self.mask!.anchorPoint = CGPoint(x: 0.5, y: 0.5)
self.mask!.position = CGPoint(x: imageView.frame.size.width/2, y: imageView.frame.size.height/2)
imageView.layer.mask = mask
self.imageView = imageView
animateMask()
// Override point for customization after application launch.
self.window!.backgroundColor = UIColor(red: 70/255, green: 154/255, blue: 233/255, alpha: 1)
self.window!.makeKeyAndVisible()
UIApplication.sharedApplication().statusBarHidden = true
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 throttle down OpenGL ES frame rates. 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:.
}
func animateMask() {
let keyFrameAnimation = CAKeyframeAnimation(keyPath: "bounds")
keyFrameAnimation.delegate = self
keyFrameAnimation.duration = 1
keyFrameAnimation.beginTime = CACurrentMediaTime() + 1 //add delay of 1 second
let initalBounds = NSValue(CGRect: mask!.bounds)
let secondBounds = NSValue(CGRect: CGRect(x: 0, y: 0, width: 90, height: 90))
let finalBounds = NSValue(CGRect: CGRect(x: 0, y: 0, width: 1500, height: 1500))
keyFrameAnimation.values = [initalBounds, secondBounds, finalBounds]
keyFrameAnimation.keyTimes = [0, 0.3, 1]
keyFrameAnimation.timingFunctions = [CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut), CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)]
self.mask!.addAnimation(keyFrameAnimation, forKey: "bounds")
}
override func animationDidStop(anim: CAAnimation!, finished flag: Bool) {
self.imageView!.layer.mask = nil //remove mask when animation completes
}
}
Я предполагаю, что эта строка: self.window!.makeKeyAndVisible() помещает эту анимацию в верхнюю часть окна и показывает ее пользователю. Но после этого мой корневой viewcontroller, который подключен к моему навигационному контроллеру, не загружается. Я попытался поместить этот код в функцию animationDidStop:
override func animationDidStop(anim: CAAnimation!, finished flag: Bool) {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let vc = ViewController(nibName: "ViewController", bundle: nil)
self.window!.rootViewController = vc
self.window!.makeKeyAndVisible()
}
Но это дает мне следующую ошибку во время выполнения:
2014-11-28 00:27:59.452 Test[3124:76510] Application windows are expected to have a root view controller at the end of application launch
2014-11-28 00:28:01.444 Test[3124:76510] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Could not load NIB in bundle: 'NSBundle </Users/MyComp/Library/Developer/CoreSimulator/Devices/0F42DE92-96A1-4D9B-A0D1-F1606FEEB2B4/data/Containers/Bundle/Application/ACAEFA85-9BE9-4C6C-8074-2692691FDA0C/Test.app> (loaded)' with name 'ViewController''
*** First throw call stack:
(
0 CoreFoundation 0x0000000108127f35 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000109ed9bb7 objc_exception_throw + 45
2 CoreFoundation 0x0000000108127e6d +[NSException raise:format(inlove) + 205
3 UIKit 0x0000000108ee68c3 -[UINib instantiateWithOwner:options(inlove) + 552
4 UIKit 0x0000000108d45f98 -[UIViewController _loadViewFromNibNamed:bundle(inlove) + 242
5 UIKit 0x0000000108d46588 -[UIViewController loadView] + 109
6 UIKit 0x0000000108d467f9 -[UIViewController loadViewIfRequired] + 75
7 UIKit 0x0000000108d46c8e -[UIViewController view] + 27
8 UIKit 0x0000000108c65ca9 -[UIWindow addRootViewControllerViewIfPossible] + 58
9 UIKit 0x0000000108c66041 -[UIWindow _setHidden:forced(inlove) + 247
10 UIKit 0x00000001166c57b0 -[UIWindowAccessibility _orderFrontWithoutMakingKey] + 68
11 UIKit 0x0000000108c7272c -[UIWindow makeKeyAndVisible] + 42
12 Test 0x0000000107b68ad1 _TFC4Test11AppDelegate16animationDidStopfS0_FTGSQCSo11CAAnimation_8finishedSb_T_ + 1297
13 Test 0x0000000107b68b67 _TToFC4Test11AppDelegate16animationDidStopfS0_FTGSQCSo11CAAnimation_8finishedSb_T_ + 71
14 QuartzCore 0x0000000108aa87ee _ZN2CA5Layer23run_animation_callbacksEPv + 308
15 libdispatch.dylib 0x000000010a6907f4 _dispatch_client_callout + 8
16 libdispatch.dylib 0x000000010a6798fb _dispatch_main_queue_callback_4CF + 949
17 CoreFoundation 0x000000010808ffe9 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
18 CoreFoundation 0x0000000108052eeb __CFRunLoopRun + 2043
19 CoreFoundation 0x0000000108052486 CFRunLoopRunSpecific + 470
20 GraphicsServices 0x000000010c0f09f0 GSEventRunModal + 161
21 UIKit 0x0000000108c21420 UIApplicationMain + 1282
22 Test 0x0000000107b68efe top_level_code + 78
23 Test 0x0000000107b68f3a main + 42
24 libdyld.dylib 0x000000010a6c5145 start + 1
25 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
Как я могу показать мой корневой viewcontroller после анимации?
1 ответ
Решение
Я нашел проблему в вашем коде.
Удалить self.window!.makeKeyAndVisible() от didFinishLaunchingWithOptions метод. Потому что это не требуется в то время. Эта строка обязательна, когда мы устанавливаем корневой контроллер вида окна, поэтому лучше animationDidStop метод.
Из вашего кода я вижу, что вы использовали Xib-файл для загрузки контроллера вида. Так что исключение поднято, потому что компилятор не может найти Xib для ViewController,
override func animationDidStop(anim: CAAnimation!, finished flag: Bool) {
self.imageView!.layer.mask = nil //remove mask when animation completes
//********** IF YOU USE STORYBOARD ***********//
// var mainStoryBoard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
// var viewController = mainStoryBoard.instantiateViewControllerWithIdentifier("ViewController") as UIViewController
//********** IF YOU USE Xib/Nib ***********//
var seconViewController = SeconViewController(nibName: "SeconViewController", bundle: NSBundle.mainBundle())
self.window?.rootViewController = seconViewController
self.window!.makeKeyAndVisible()
}
Здесь я также написал код для раскадровки, если вы хотите загрузить контроллер представления из раскадровки после этой анимации. Просто удалите вышеуказанную часть комментария и назначьте viewController как rootViewController для этого.
Я создал демо для этого. Если вы не можете понять это.
Образец Демо
