AVAudioEngine.connect在硬件而非模拟器上崩溃 [英] AVAudioEngine.connect crash on hardware not simulator

问题描述

var engine:AVAudioEngine!
var format = engine.inputNode.inputFormat(forBus: 0)
engine.connect(engine.inputNode, to: engine.mainMixerNode, format: format)

在AVAudioEngine.connect函数中，我的应用仅在硬件上崩溃但是在模拟器中就可以了.

in function AVAudioEngine.connect make my app crash only on hardware but in simulator it's fine.

当我在硬件上运行时，提示错误.

When I run on hardware it's error says.

Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'required condition is false: IsFormatSampleRateAndChannelCountValid(format)'
terminating with uncaught exception of type NSException

推荐答案

我知道了.我只是将AVAudioSession类别类型设置为错误.如果您遇到相同的错误，请查看AVAudioSession并确保您的AVAudioSession类别处于正确的麦克风权限设置中.例如

I figure it out. I just set the AVAudioSession category type wrong. If you have the same error take a look at AVAudioSession and make sure that your AVAudioSession category is in the right setting for microphone permission. for instance

AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord, with: .mixWithOthers)

使用此设置将允许应用同时使用麦克风和播放声音.

with this setting will allow app to use microphone and play sound in the same time.

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