Some questions about localizable push payload content - ios

Question

In the apple documentation for pushes they give the following example payload
{
"aps" : {
"alert" : {
"loc-key" : "GAME_PLAY_REQUEST_FORMAT",
"loc-args" : [ "Jenna", "Frank"]
},
"sound" : "chime.aiff"
},
"acme" : "foo"
}
Described as
The following payload uses the loc-key to specify a localized string
in the app’s Localizable.strings file. That string is displayed as the
message of the alert. The loc-args contains values to substitute into
the string before displaying it.
There is nothing in the "loc-key" or "loc-args" to indicate if this for the title, subtitle or message, so how does the substitution get applied?
How would this payload be extended to apply the same principle to the push alert title, and subtitle, and body, so that all three have their content pulled from the Localizable.strings file?

Answer 1

You can check here
You have loc-key which is the body part, also you have title-loc-key and subtitle-loc-key. If you use these keys once when the messages are received the keys will be changed with the values from Localizable.strings files.
This is an example:
{
"aps" : {
"alert" : {
"loc-key" : "KEY",
"title-loc-key" : "MY_TITLE_KEY",
"subtitle-loc-key" : "MY_SUBTITLE_KEY"
}
}
}
As an additional explanation, loc-args, title-loc-args and subtitle-loc-args are used for such cases:
You want to localize string which says how much points you get in the title of the notification.
you need such row in your strings file:
...
"wining_notification_title_key" = "You won %# points";
...
And then int notification will be:
{
"aps" : {
"alert" : {
"title-loc-key" : "wining_notification_title_key",
"title-loc-args" : ["5"]
}
}
}