首次音频启动延迟-iOS Swift

Question

I am creating an application with five buttons. When I click on each button each audio will play. It is working. Now my problem is when I click first button audio play with 1 second delay(App stuck for 1 second) and play. Next time clicks a button audio play without any delay. What could be the issue here?

I am using the following code to play an audio

var currentAudio = try? AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("sample_audio", ofType: "mp3")!));
 currentAudio!.stop()
currentAudio!.currentTime = 0
 currentAudio!.play();

Please someone help me to finds this issue.

Answer 1

You could use AVAudioPlayer's .prepareToPlay() method to preload the player's buffers , it will increase AVAudioPlayer's performance (faster start).

The idea is to prepare the player some time before actually playing it:

currentAudio?.prepareToPlay()

then later, in your play function, it will start immediately:

currentAudio?.play()