What is the maximum number of UNNotificationActions a user can see and interact with when force pressing on a notification?
It's pretty clear:
A notification can display up to four actions onscreen at once, and in
some cases may display only two of those actions.
From Apple's Documentation
Related
I have a push notification with rich content.
Can I make it in such way that it is not tappable, i.e., a single tap will not open the application. It must be dragged down to rich content or 3D touched, or deleted from the notification center by swiping.
How should I indicate to the user to drag down (3D touch) in order to reveal rich content on notification?
No, a tap on a push notification will always open the notification in the app, and as far as I know there is no way in public API to override this behavior. It does appear there is a private API to get the behavior you’re looking for, as some iOS-generated (local, not push) notifications appear to do exactly what you’re asking. If you can manage to uncover that, use at your own risk should Apple find out.
Now, as for possible solutions: I would consider implementing code on your app’s delegate to respond appropriately when the notification is opened. For example, send the user to an appropriate location in the app when the app is launched from a notification…perhaps a view controller that shows the same content that would be shown as the rich notification content. I don’t know the exact use case, but the wording implies to me that if the app launches to its main interface, it could be confusing to a user.
It’s impossible for me to tell you how exactly you wish to respond to notifications, so for more on responding appropriately when the app was launched from a push notification, see the following documentation from Apple:
Determine Why Your App Was Launched
UIApplicationDelegate.application(_:willFinishLaunchingWithOptions:)
UIApplicationDelegate.application(_:didFinishLaunchingWithOptions:)
UIApplication.LaunchOptionsKey
UIApplication.LaunchOptionsKey.remoteNotification
Hopefully from that you can find a suitable solution. But if that isn’t an option, consider directly telling the user at some point to press firmly (or tap and hold, as many devices do not support 3D Touch) to view the content. You could do this during some onboarding process or, as an absolute last resort, in the notification itself.
Before proceeding down that route, though, understand that not all users know 3D Touch and/or this rich-content functionality even exists — even fewer use it regularly — and if they become confused, they may decide to clear the notification or outright disable your app’s notifications. In general, it’s also a bad idea to “teach” your user unfamiliar ways of using their device. If a user is used to tapping on notifications, as many are, they will most likely tap on your notifications. It can be tough to break that muscle memory.
Posting notifications from the NSNotificationCenter on the certain button click event Hence When I have rapid button events The notification is being called that many times leads to the many problems. I want to cancel the previous posted notification when rapid events happening. How to do with below code.
func buttonClick() {
// I want to cancel the previous Event here
NSNotificationCenter.defaultCenter().postNotificationName("Event", object: self)
}
UPDATE:
Let me explain clearly what I want actually I have one observer method when a button click is happened from that I want to post the some notifications to control some UI elements like changing the button image. The problem is When I hit the button rapidly observer getting called many times as well my notifications being posted on the same count hence UI is blinking I can't have control on the Observer on the button click event I have only control over the posted event from my side.
Any help much appreciated.
NSNotificationCenter.post() is synchronous. It does not return until all the observers have performed their actions. So there is no way to cancel it; there is no queue.
If you are generating a lot of notifications very close to each other (especially within the same run-loop cycle), you can coalesce them using NSNotificationQueue with enqueueNotification. Generally something like:
NSNotificationQueue.defaultQueue().enqueNotification(note, postingStyle: .whenIdle)
That said, if this is tied to a button click (a human interaction), then the notifications are likely very far apart in computer terms. Half a second is an eternity in computer terms. If that's the case, you're likely better-off controlling this first at the UI, by disabling the button until you're willing to accept another click (for example with button.enabled = false).
It is possible to write a wrapper that coalesces operations over any arbitrary period, but this is likely to be confusing in your case, because the user will be able to click something that the system will ignore. If that's still what you want, I'll see if I can find an example of a coalescing trampoline (I've written them in ObjC, but I don't have a Swift example on hand).
This question already has answers here:
How to detect push notification sent to other apps?
(2 answers)
Closed 6 years ago.
I'm working on an iOS game that has a score counter and some buttons at the top of the screen. When I receive any push notifications for a different app (e.g. a new email), the push notification covers the top of the screen for a few seconds, which is annoying when you're in the middle of a game. I would like to know whenever a third-party notification is being displayed, so that I can move the score counter and buttons below the push notification while it is being shown.
Is this possible?
Unfortunately, as of now (and probably forever) there is no API or way to interact with Apple's Notification Center, and thus it's impossible to know when a third-party notification is displaying. This is primarily because they strive to keep a consistent user experience across their entire platform at the developer's expense. The closest you can get is knowing when an application has left and entered the foreground (which will happen when they tap that notification) to properly pause the game
Thankfully, users can dismiss the alerts really quickly with a swipe of a thumb, but regardless, it's still annoying. Maybe make some small adjustments to your UI with this knowledge and have less user taps necessary at the top of the screen?
Good luck!
What is the maximum number of actions that can be associated with a push notification and still show up on the lock screen? For example, in this picture, there are two actions. Is it possible to put more than that?
NO
banner、lock screen、notification center up to 2 actions
notification alert up to 4 actions
See:
https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/NotificationCenter.html
I want to have some information drop down from the top of a view, stay on the screen for a second or two, and then go back up out of the view. I have search for displaying notifications and/or banners. All I get is either push notifications (which I don't need to use) or iAds banners.
I'm working on a barcode scanning app and I want to briefly show the value of the barcode shown without requiring the user to tap on anything. How can I accomplish this?
Don't use notifications and banners, because that might not work: the user can turn them off. In any case this is not a notification of anything, so it's a misuse of notifications.
Just do what you described, yourself: animate a view onto the screen, and then (in the animation's completion handler) use delayed performance to animate the view right back off the screen after a short delay.
You should use a view which manages its own state (INCOMING, STAY PUT, OUTGOING). This way you can reduce the memory footprint and many other bugs in the process. I coded something for a similar process. Check it out