Push Notifications

Question 1

Notification message flow

Answer 1

Question 2

Maximum payload

Answer 2

4KB

Question 3

grouping notification

Answer 3

Adding the thread_identifier key to the alert dictionary will let iOS combine all notifications with the same identifier value into a single group in the notification center

Question 4

“Utilize the apns-collapse-id HTTP header field when”

Answer 4

“overriding” or “updating” your notification is more appropriate than sending an additional notification.”

Question 5

Standard Payload

Answer 5

aps”: {
“alert”: {
“title”: “Your food is done.”,
“body”: “Be careful, it’s really hot!”
},
“badge”: 12,
“sound”: {
“critial”: 1,
“name”: “filename.caf”,
“volume”: 0.75
}
}
}

everything what outside is your custom keys

Question 6

When apple will issue a new device token

Answer 6

When the user installs the app on another device, restores from an old backup, reinstalls iOS and in some other cases. You should never try and link a token to a specific user.

Question 7

Provisional authorization

Answer 7

“Apple provides another useful case for the UNAuthorizationOptions enum that you can pass to requestAuthorization during setup. If you include .provisional in the options argument, notifications will automatically be delivered silently to the user’s Notification Center, without asking for permission - there will be no sound or alerts for these provisional notifications.”

Question 8

Critical alerts

Answer 8

Critical alerts will bypass the Do Not Disturb and ringer switch settings as well as always play a sound… even a custom sound.

Question 9

“If you’d like to have iOS display your notification while your app is running in the foreground, you’ll need to implement the UNUserNotificationCenterDelegate method:

Answer 9

which is called when a notification is delivered to your app while it’s in the foreground. The only requirement of this method is calling the completion handler before it returns

Question 10

tap notification

Answer 10

didRecieve

Question 11

Make another class delegate for nsNotificationDelegate

Answer 11

you can send info from appDelegate, but appDelegate is a delegate for NSNotification and it the same time you can make another class to conform NSNotificationDelegate and set it as self in appDelegate for NSNotification object

Question 12

For iOS to display your notification while your app is running in the foreground, you’ll need to implement a

Answer 12

UNUserNotificationCenterDelegate method, which is called when a notification is delivered to your app while it’s in the foreground.”

Question 13

Sometimes, you want a tapped notification to open a specific view controller within your app. You will need to

Answer 13

add an additional method to handle this routing.

Question 14

You can make a push notification actionable by attaching

Answer 14

a button to a notification

Question 15

Notification categories allow you to specify

Answer 15

up to four custom actions per category that will be displayed with your push notification

Question 16

Since you do not want the AppDelegate to be where you take action when a push notification arrives

Answer 16

send a Foundation notification that reports what happened instead. That allows your other view controllers to take an appropriate action.

Question 17

How to send info that User click action to other view controller

Answer 17

1. create & register category
2. create Notification.Name ext to send appropriate notification for each action
3. subscribe from each vc that you want to get it

Question 18

Sharing data with your main target

Answer 18

App Groups

Question 19

badging push notification

Answer 19

use userDefault to calculate badges

Question 20

Get info from core date from service ext

Answer 20

Checkmark service ext in each class that you going to use in service ext (app groups should be enabled)

Create custom place for your core date container

Question 21

Accepting text input in push notification

Answer 21

UNTextInputNotificationAction