我的ViewController.
swift
func startTimer() {
timer = NSTimer().scheduleTimerWithTimerInvterval(1.0,target: self,selctor: Selector("couting"),userinfo: nil,repeats: true)
}
func pauseTimer() {
timer.invalidate()
println("pausing timer")
}
这是appDelegate.swift
func applicateWillResignActive(application: UIApplication) {
viewController().pauseTimer()
println("closing app")
}
它是打印暂停计时器和关闭应用程序,但当我再次打开时,我看到它从未暂停.我该怎么做？
解决方法
你必须设置一个观察者在应用程序进入后台时监听.在ViewController的viewDidLoad()方法中添加以下行.
NSNotificationCenter.defaultCenter().addObserver(self,selector: Selector("myObserverMethod:"),name:UIApplicationDidEnterBackgroundNotification,object: nil)
func myObserverMethod(notification : NSNotification) {
println("Observer method called")
//You may call your action method here,when the application did enter background.
//ie.,self.pauseTimer() in your case.
}
快乐的编码!!!
