收到 APN 时运行函数 [英] Run function when APN is received

问题描述

我能够在我的应用中集成 APNS.现在我想在用户点击通知或用户在使用应用程序时收到通知时处理通知.我使用下面的代码在收到通知时显示警报对话框:

I was able to integrate APNS in my app. Now I want to handle the notifications when the user taps it or when the user receives a notification while using the app. I use the code below to show an alert dialog when a notification is received:

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)
        }
    }

是否可以在我的 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.

Is it possible to run a function in my MainViewController instead of showing the dialog? I tried calling my function MainViewController.refreshData() but it always gives me a nil.

推荐答案

是的，可以通过发布和添加观察者.

Yes it is possible by Posting and adding observer.

使用 NSNotificationCenter 来制作.

Use NSNotificationCenter to make it.

我在 Objective C 代码中发帖，尝试转换为 Swift.

I am posting in Objective C code, try to convert to 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

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

并在您的 MainViewController

 - (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];

  }
 }

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