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Store localized message strings in your app bundle.īoth localization approaches have advantages and disadvantages and you should choose the technique that best fits your needs. Provide localized content from your provider server. There are two ways to localize the content of remote notifications: Localizing the Content of Your Remote Notifications
#Sound particles apple sandbox restrictions how to#
For information about how to handle the selection of custom actions in your app, see Responding to the Selection of a Custom Action.
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Use that method to initiate any download operations needed to fetch new data.
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In iOS, the system delivers background update notifications by calling the application:didReceiveRemoteNotification:fetchCompletionHandler: method of your app delegate. When a background update notification is delivered to the user’s device, iOS wakes up your app in the background and gives it up to 30 seconds to run. If there are user-visible updates that go along with the background update, you can set the alert, sound, or badge keys in the aps dictionary, as appropriate. To support a background update notification, make sure that the payload’s aps dictionary includes the content-available key with a value of 1.
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The actual limits are dynamic and can change based on conditions, but try not to send more than a few notifications per hour. APNs treats background update notifications as low priority and may throttle their delivery altogether if the total number becomes excessive. The acme2 key contains an array of app-specific data.īackground update notifications are not meant as a way to keep your app awake in the background beyond quick refresh operations, nor are they meant for high priority updates. The following payload contains an aps dictionary with a simple alert message. Although the examples include whitespace and line breaks for readability, in practice, you should omit whitespace and line breaks to reduce the size of the payload.Įxample 1. The examples also includes keys whose names include the string “acme”, which represent custom data included by a fictional app. The most important part of the payload is the aps dictionary, which contains Apple-defined keys and is used to determine how the system receiving the notification should alert the user, if at all.
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The following examples illustrate the structure of the JSON dictionary and the keys you can include for your notifications. Upon receiving the notification, the app should open a direct connection to your email server to retrieve the email messages. For example, an email app could use remote notifications to badge the app’s icon or to alert the user that new email is available in a specific account, as opposed to sending the contents of email messages directly.
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Instead, use notifications to alert the user to new information or as a signal that your app has data waiting for it. If you are using the legacy APNs binary interface to send notifications instead of an HTTP/2 request, the maximum payload size is 2KB (2048 bytes)ĪPNs refuses notifications whose payload exceeds the maximum allowed size.īecause the delivery of remote notifications is not guaranteed, never include sensitive data or data that can be retrieved by other means in your payload.