Behavior of PUSH Notification Actual Machine Tests Using NCMB

I think that connecting and disconnecting the cable means foreground or background.
The method called depends on whether it is foreground or background.
https://qiita.com/sxo/items/eab3e2bc9febb57cf37f#%E3%81%9D%E3%81%AE3-push%E9%80%9A%E7%9F%A5%E3%82%92%E5%8F%97%E4%BF%A1%E3%81%99%E3%82%8B

// Receive normal Push notifications
- (void) application: (UIApplication*) application didReceiveRemoteNotification: (NSDictionary*) userInfo {
NSLog(@"pushInfo:%@", [userInfo description]);}

// Background Fetch Receives Background
- (void) application: (UIApplication*) application didReceiveRemoteNotification: (NSDictionary*) userInfo
fetchCompletionHandler: (void
) (^)(UIBackgroundFetchResult)) completionHandler {
NSLog (@"pushInfo in Background: %@", [userInfo description]);
completionHandler (UIBackgroundFetchResultNoData);}