Instance Method


Sets the audio session’s category, mode, and options.


func setCategory(_ category: AVAudioSession.Category, mode: AVAudioSession.Mode, options: AVAudioSession.CategoryOptions = []) throws



The category to apply to the audio session. See AVAudioSession.Category for supported category values.


The audio session mode to apply to the audio session. For a list of values, see AVAudioSession.Mode.


A mask of additional options for handling audio. For a list of constants, see AVAudioSession.CategoryOptions.

Return Value

Returns true if the audio session category and options were set successfully; otherwise false.


The audio session’s category and mode together define how your app uses audio. Typically, you set the category and mode before activating the session. You can also set the category or mode while the session is active, but doing so results in an immediate change.

See Also

Configuring the Audio Session

var category: AVAudioSession.Category

The current audio session category.

func setCategory(AVAudioSession.Category)

Sets the audio session’s category.

var availableCategories: [AVAudioSession.Category]

The audio session categories available on the current device.

struct AVAudioSession.Category

Audio session category identifiers.

var categoryOptions: AVAudioSession.CategoryOptions

The set of options associated with the current audio session category.

func setCategory(AVAudioSession.Category, options: AVAudioSession.CategoryOptions)

Sets the audio session’s category with the specified options.

struct AVAudioSession.CategoryOptions

Constants that specify optional audio behaviors.

var mode: AVAudioSession.Mode

The current audio session’s mode.

func setMode(AVAudioSession.Mode)

Sets the audio session’s mode.

var availableModes: [AVAudioSession.Mode]

The audio session modes available on the device.

struct AVAudioSession.Mode

Audio session mode identifiers.

enum AVAudioSession.RouteSharingPolicy

Cases that indicate the possible route-sharing policies for an audio session.