问题描述
这是一种从后台模式返回后保持视图暂停的方法。
(有关Xcode 8的说明,请参见下文)
在情节提要中,
1)将视图的类更改为MyView
在视图控制器中,
2)用一个名为stayPaused的布尔值定义一个SKView子类
class MyView: SKView {
var stayPaused = false
override var paused: Bool {
get {
return super.paused
}
set {
if (!stayPaused) {
super.paused = newValue
}
stayPaused = false
}
}
func setStayPaused() {
if (super.paused) {
self.stayPaused = true
}
}
}
3)将视图定义为MyView
4)添加一个通知程序来设置stayPaused标志
class GameViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
if let scene = GameScene.unarchiveFromFile("GameScene") as? GameScene {
// Configure the view.
let skView = self.view as MyView
NSNotificationCenter.defaultCenter().addObserver(skView, selector:Selector("setStayPaused"), name: "stayPausedNotification", object: nil)
在应用程序委托中,
5)发布通知以设置应用程序处于活动状态时的停留暂停标志
func applicationDidBecomeActive(application: UIApplication) {
NSNotificationCenter.defaultCenter().postNotificationName("stayPausedNotification", object:nil)
}
在情节提要中,
1)将视图的类别从更改SKView
为MyView
在视图控制器中,
2)定义一个SKView
带有名为stayPaused的布尔值的子类
class MyView: SKView {
var stayPaused = false
override var isPaused: Bool {
get {
return super.isPaused
}
set {
if (!stayPaused) {
super.isPaused = newValue
}
stayPaused = false
}
}
func setStayPaused() {
if (super.isPaused) {
self.stayPaused = true
}
}
}
3)将视图定义为MyView
4)添加一个通知程序来设置stayPaused标志
class GameViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
if let view = self.view as! MyView? {
NotificationCenter.default.addObserver(view, selector:#selector(MyView.setStayPaused), name: NSNotification.Name(rawValue: "stayPausedNotification"), object: nil)
在应用程序委托中,
5)发布通知以设置应用程序处于活动状态时的停留暂停标志
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.
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "stayPausedNotification"), object: nil)
}
解决方法
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