swift程序进入后台

概述class ViewController: UIViewController { @IBOutlet weak var message: UILabel! @IBOutlet weak var myNotification: UILabel! override func viewDidLoad() { super.viewDidLoad(

class VIEwController: UIVIEwController {        @IBOutlet weak var message: UILabel!    @IBOutlet weak var myNotification: UILabel!        overrIDe func vIEwDIDLoad() {        super.vIEwDIDLoad()        NSNotificationCenter.defaultCenter().addobserver(self,selector: #selector(VIEwController.updateInterface(_:)),name: UIApplicationWillEnterForegroundNotification,object: nil)    }        func updateInterface (notification: NSNotification){        myNotification.text = "Back to background with notification"    }        overrIDe func dIDReceiveMemoryWarning() {        super.dIDReceiveMemoryWarning()    }    }@H_502_1@按下home键之后,myNotification的text永久的改为 "Back to background with notification"          总结       
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