运行收到 APN 时的功能

Question

我能够将 APNS 集成到我的应用程序中。现在我想在用户点击通知时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)
        }
    }

是否可以运行我的 MainViewController 中的函数而不是显示对话框？我试着调用我的函数 MainViewController.refreshData() 但它总是给我一个 nil.

Answer 1

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)
    }
}

Answer 2

是的，可以通过发布和添加观察员来实现。

使用 NSNotificationCenter 制作。

我在Objective C代码中发帖，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

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

并且在您的 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];

  }
 }

运行收到 APN 时的功能

Run function when APN is received

apple-push-notifications

swift

运行 收到 APN 时的功能

Run function when APN is received

apple-push-notifications

swift

运行收到 APN 时的功能