beginBackgroundTaskWithExpirationHandler

Question

I am making an application where audio will play in the background. In the following code, bgTask is undeclared. What kind of object should bgTask be?

- (voi         


        

Answer 1

You need to declare bgTask before you assign:

UIBackgroundTaskIdentifier bgTask = 0;

Answer 2

You are using the bgTask in the block so you have to declare it like this..

__block UIBackgroundTaskIdentifier bgTask = 0;

__block will allow this variable to use in the block method. And its have double underscore.

Answer 3

I cannot comment on previous answers, however to initialize UIBackgroundTaskIdentifier you should not set it to nil or 0. You should set it to:

UIBackgroundTaskInvalid

In the documentation UIBackgroundTaskInvalid says it should be used to initialize variables or to check for errors.