func application(application: UIApplication,didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

AFNetworkReachabilityManager.sharedManager().startMonitoring()
AFNetworkReachabilityManager.sharedManager().setReachabilityStatusChangeBlock { (status) in
switch status {
case .Unknown:
JLToast.makeText("当前网络未知",duration: 3).show(UIApplication.sharedApplication().keyWindow)
case .NotReachable:
JLToast.makeText("当前网络不可以用，请检查!",duration: 3).show(UIApplication.sharedApplication().keyWindow)
case .ReachableViaWiFi:
break
case .ReachableViaWWAN:
break

}
}

//写你的代码


return true
}

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. AFNetworkReachabilityManager.sharedManager().stopMonitoring() } func applicationWillEnterForeground(application: UIApplication) { // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. AFNetworkReachabilityManager.sharedManager().startMonitoring() }