Ios Extension Host App

System today view hosts all the today widgets.

Ios extension host app. To ensure that a host app offers your extension only when the user has selected data of a type that you support add the nsextensionactivationrule key to your extension s info plist property list file. Batch jobs to the rescue. When this is the case you can use the nsurlsession class to initiate a transfer in the background.

You can also use this key to specify a maximum number of items of each type that your extension can handle. The host app is the one who exchanges these requests and responses with your extension. If you use share extension or custom keybord extension every app which has share button or input text field can host it.

Because a background transfer uses a separate process the transfer can continue as a low priority task after your extension completes the host app s request and gets terminated. Host application processes memory hungry jobs. To learn more about the extension context see respond to the host app s request.

Third party apps system apps or even some parts of ios itself may be the host app. In ios your app extension might need a bit more time to complete a potentially lengthy task such as uploading content to a website. An app that a user employs to choose an app extension is called a host app.

Audio unit ios and macos. I just never run into the memory limitations however stringent for the extensions that are meant to be simple and not burden the host app with lots of heap consumed anton tropashko jan 20 20 at 10 31. Ui and non ui variants manipulate or view content originating in a host app.

This can at the discretion of the host include user selected content. At wwdc 2014 apple showed us a demo of an action extension that translated the text of a web page to another language without leaving safari. Action extensions allow users to transform content originating in a host app without leaving the app.