Question

我能够在我的应用中集成APNS。现在，我希望在用户点击它或用户在使用应用程序时收到通知时处理通知。我收到通知时使用下面的代码显示警告对话框：

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
        // display the userInfo
        if let notification = userInfo["aps"] as? NSDictionary,
            let alert = notification["alert"] as? String {
            var alertCtrl = UIAlertController(title: "Time Entry", message: alert as String, preferredStyle: UIAlertControllerStyle.Alert)
            alertCtrl.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil))
            // Find the presented VC...
            var presentedVC = self.window?.rootViewController
            while (presentedVC!.presentedViewController != nil)  {
                presentedVC = presentedVC!.presentedViewController
            }
            presentedVC!.presentViewController(alertCtrl, animated: true, completion: nil)

            // call the completion handler
            // -- pass in NoData, since no new data was fetched from the server.
            completionHandler(UIBackgroundFetchResult.NoData)
        }
    }

是否可以在MainViewController中运行一个函数而不是显示对话框？我尝试调用我的函数MainViewController.refreshData()，但它总是给我一个nil。

Answer 1

是的，可以通过发布和添加观察者来实现。

使用NSNotificationCenter进行制作。

我发布了Objective C代码，尝试转换为Swift。

@implementation AppDelegate

static void displayStatusChanged(CFNotificationCenterRef center, void *observer,
                             CFStringRef name, const void *object,
                             CFDictionaryRef userInfo) {
if (name == CFSTR("com.apple.springboard.lockcomplete")) {
    [[NSUserDefaults standardUserDefaults] setBool:YES
                                            forKey:@"kDisplayStatusLocked"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}
}


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
CFNotificationCenterAddObserver(
                                CFNotificationCenterGetDarwinNotifyCenter(), NULL, displayStatusChanged,
                                CFSTR("com.apple.springboard.lockcomplete"), NULL,
                                CFNotificationSuspensionBehaviorDeliverImmediately);
 return YES;
 }

然后将此代码粘贴到 didRecieveRemoteNotification

中

 [[NSNotificationCenter defaultCenter]postNotificationName:@"TestNotification" object:self];

在 MainViewController

中

 - (void)viewDidLoad {

 [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(receiveTestNotification:)
                                             name:@"TestNotification"
                                           object:nil];


  }


 - (void) receiveTestNotification:(NSNotification *) notification
 {

if ([[notification name] isEqualToString:@"TestNotification"]) {
    NSLog (@"Successfully received the test notification!");

   //perform your operations
   [self refreshData];

  }
 }

Answer 2

func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
    // display the userInfo
    if let notification = userInfo["aps"] as? NSDictionary,
        let alert = notification["alert"] as? String {
            var alertCtrl = UIAlertController(title: "Time Entry", message: alert as String, preferredStyle: UIAlertControllerStyle.Alert)
            alertCtrl.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler:  { (UIAlertAction) -> Void in
                            //Your Function call when you click Ok Button.
                          self.YourFunc()
                            }))
            // Find the presented VC...
            var presentedVC = self.window?.rootViewController
            while (presentedVC!.presentedViewController != nil)  {
                presentedVC = presentedVC!.presentedViewController
            }
            presentedVC!.presentViewController(alertCtrl, animated: true, completion: nil)

            // call the completion handler
            // -- pass in NoData, since no new data was fetched from the server.
            completionHandler(UIBackgroundFetchResult.NoData)
    }
}

收到APN时运行功能

2 个答案: