如何在 iOS 应用中检测不活动或没有用户交互。用于显示单独的屏幕，如覆盖或屏幕保护程序。
通过以下链接
link that used to present screen overlay when the app became inactive
我可以在应用程序中显示屏幕保护程序。但是正常的关闭 View Controller 代码无法关闭呈现的 View Controller 。
we are presenting the custom overlay using
// The callback for when the timeout was fired.
func applicationDidTimout(notification: NSNotification) {
let storyboard = UIStoryboard(name: "MyStoryboard", bundle: nil)
let vc =
storyboard.instantiateViewControllerWithIdentifier("myStoryboardIdentifier")
UIApplication.shared.keyWindow?.rootViewController = vc
}
我们在这方面面临的问题是。一旦呈现 View ，我们就无法关闭或删除 View Controller 。
最佳答案
来自@Prabhat Kesara 的评论和@Vanessa Forney 在帮助链接中的回答。我提供了以下解决方案，它工作正常。如果有人提出这样的要求，他们可以使用这个
import UIKit
import Foundation
extension NSNotification.Name {
public static let TimeOutUserInteraction: NSNotification.Name = NSNotification.Name(rawValue: "TimeOutUserInteraction")
}
class UserInterractionSetup: UIApplication {
static let ApplicationDidTimoutNotification = "AppTimout"
// The timeout in seconds for when to fire the idle timer.
let timeoutInSeconds: TimeInterval = 1 * 60 //5 * 60 //
var idleTimer: Timer?
// Listen for any touch. If the screen receives a touch, the timer is reset.
override func sendEvent(_ event: UIEvent) {
super.sendEvent(event)
if idleTimer != nil {
self.resetIdleTimer()
}
if let touches = event.allTouches {
for touch in touches {
if touch.phase == UITouch.Phase.began {
self.resetIdleTimer()
}
}
}
}
// Resent the timer because there was user interaction.
func resetIdleTimer() {
if let idleTimer = idleTimer {
// print("1")
let root = UIApplication.shared.keyWindow?.rootViewController
root?.dismiss(animated: true, completion: nil)
idleTimer.invalidate()
}
idleTimer = Timer.scheduledTimer(timeInterval: timeoutInSeconds, target: self, selector: #selector(self.idleTimerExceeded), userInfo: nil, repeats: false)
}
// If the timer reaches the limit as defined in timeoutInSeconds, post this notification.
@objc func idleTimerExceeded() {
print("Time Out")
NotificationCenter.default.post(name:Notification.Name.TimeOutUserInteraction, object: nil)
let screenSaverVC = UIStoryboard(name:"ScreenSaver", bundle:nil).instantiateViewController(withIdentifier:"LandingPageViewController") as! LandingPageViewController
if let presentVc = TopMostViewController.sharedInstance.topMostViewController(controller: screenSaverVC){
let root: UINavigationController = UIApplication.shared.keyWindow!.rootViewController as! UINavigationController
if let topView = root.viewControllers.last?.presentedViewController {
topView.dismiss(animated: false) {
root.viewControllers.last?.navigationController?.present(presentVc, animated: true, completion: nil)
}
}else if let topViewNavigation = root.viewControllers.last {
topViewNavigation.navigationController?.present(presentVc, animated: true, completion: nil)
}
}
}
}
我面临的困难是在已经呈现的 View 上方呈现叠加层或屏幕保护程序。这种情况，我们也在上面的解决方案中处理。
快乐编码:)
关于ios - 在 iOS 中检测不活动(无用户交互)以显示单独的屏幕，如覆盖，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53389572/