如何在另一个视图控制器中控制对象？ （Xcode：objective-c）

Question

I am making a sort of music application and the main view has the playback buttons at the top with other buttons too. This section only takes up the top section of the view as the other part has a container view in it.

I initially had buttons to switch from view to view but I need the audio to be played whilst on different views and to be able to play, pause etc while in the other views

How do I have the button in the main controller act on objects from the child view container?

Answer 1

There are a few ways of sending messages from one view controller to another.

1. Singleton.
2. Delegates.
3. KVO.
4. Notifications.

Since you're building an audio application, using a Singleton might be the best way forward.

Your singleton is instantiated once, keeps your playback functionality separate from your view controllers and can therefore be accessed from anywhere within your application.

Perhaps you have a play function in your singleton, which starts your audio, and a pause function that pauses it. You should be able to call these functions from any view controller.

It would be as simple as:

AudioSingleton.shared().play