How can I send an Apple Push Notification with multiple lines i.e. with a '\n' character?

Question

I would like to know how to send an apple push notification message with multiple lines. Using '\n' doesn't seem to work.

Something like:

First line

Second Line

Right now it seems to just ignore the message altogether.

Coming

iOS seems to ignore wrongly encoded messages, while Android shows them with broken code. – Solarium

Answer 1

You cannot send multi line push with a escape, it will not work!

simply tried to send push with Parse:

Payload without an escape:

{ "alert": "Send me\na push without escape", "sound": "default" }

Result:

Payload with an escape

{ "alert": "Send me\\na push with escape", "sound": "default" }

Result:

Chretien

Hi Johnny I am trying to send push notification using APNSwrapper. BUt nothing happens on device. from APNSWrapper import * #mylocal_DeviceToken='e0cf72eaaf87ef73be7a9687a5eb16caaae8da63' mylocal_PushMagic='9B6A010D-52C0-477C-9C67-59CCE8AB77A2' wrapper = APNSNotificationWrapper('PushCert.pem', False) message = APNSNotification() message.tokenBase64('5755bfa7297b765cd03fdc6f47a137ef1e9126ef') #message.token(mylocal_DeviceToken) message.badge(5) message.appendProperty(APNSProperty('mdm', mylocal_PushMagic)) wrapper.append(message) wrapper.notify() please help – Gandzha

Answer 2

I have used chr(10) in PHP to send a newline as part of a push message, eg.

$message = "Hey {user_firstname}! " . chr(10) . "you have a new message!"

Bendicty

This worked for me on iOS using One Signal for end delivery. – Gondolier

Works with firebase too, even when using $text = str_replace('\n', chr(10), $text); – Solarium

Answer 3

Add a localizable strings file and add your string there. For example, you could have something like:

"Push_String" = "My push string with a line break\n and argument: %@";

Now in your notification payload, use the loc-key and loc-args properties, for example:

"loc-key":"Push_String","loc-args":["My argument!"]

Now you should have a line break in your notification.

Supersonics

Answer 4

use double quote for string like:

string = "first line  \r\n Second line ";

Disoblige

Worked for me in iOS 12. I guess \r is a carriage return. – Highflier

Answer 5

I figured it out: esacpae the \n. Duh.

so use:

First line \\n
Second Line

instead of

First line \n
Second Line

Coming

This shouldn't be down-voted. It does in fact work when the final JSON string contains \\n. Keep in mind that your programming language may already be performing that conversion for you, so if you also have logic that is escaping the backslash again, that will cause problems. – Dulcia

Answer 6

Apple push will reject a string for a variety of reasons. I tested a variety of scenarios for push delivery, and this was my working fix (in python):

#  Apple rejects push payloads > 256 bytes (truncate msg to < 120 bytes to be safe)
if len(push_str) > 120:
    push_str = push_str[0:120-3] + '...'

# Apple push rejects all quotes, remove them
import re
push_str = re.sub("[\"']", '', push_str)

# Apple push needs to newlines escaped
import MySQLdb
push_str = MySQLdb.escape_string(push_str)

# send it
import APNSWrapper
wrapper = APNSWrapper.APNSNotificationWrapper(certificate=...)
message = APNSWrapper.APNSNotification()
message.token(...)
message.badge(1)
message.alert(push_str)
message.sound("default")
wrapper.append(message)
wrapper.notify()

Unhouse

Answer 7

you can try:

alert:"this is 1st line \\n"

Gerik

Answer 8

Perhaps what you're looking for is the subtitle attribute. See Multi line title in push notification for iOS

Forspent

Answer 9

If your payload have "\\n" do this:

parse first your payload like this

title = First line \nSecond Line //either \n or \\n
title = title.replacingOccurrences(of: "\\\\n", with: "\n", options: .regularExpression)

the best solution is to make your payload "\n" or "\r\n"

Jezabel