ios - 使用 Avfoundation 在 Swift 中使用蓝牙耳机的麦克风和扬声器进行录制和播放
<p><p>下面的示例代码运行良好(感谢 Oskar Jonsson)。</p>
<pre><code> ViewController.swift
MicToSpeakers
Created by Oskar Jönsson on 2016-09-09.
Copyright © 2016 Oskar Jönsson. All rights reserved.
import UIKit
import AVFoundation
class ViewController: UIViewController {
var engine = AVAudioEngine()
let player = AVAudioPlayerNode()
let audioSession = AVAudioSession.sharedInstance()
override func viewDidLoad() {
super.viewDidLoad()
/* when these two lines uncommented. the device was able to playback on bluetooth earbuds, however its still using the internal mic
try! audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord,
mode:AVAudioSessionModeDefault,
options:AVAudioSessionCategoryOptions.allowBluetoothA2DP)
try! audioSession.setActive(true)
*/
let input = engine.inputNode!
engine.attach(player)
let bus = 0
let inputFormat = input.inputFormat(forBus: bus)
engine.connect(player, to: engine.mainMixerNode, format: inputFormat)
input.installTap(onBus: bus, bufferSize: 512, format: inputFormat) { (buffer, time) -> Void in
self.player.scheduleBuffer(buffer)
print(buffer)
}
}
@IBAction func start(_ sender: Any) {
do{
try! engine.start()
} catch {
print(error)
}
player.play()
}
@IBAction func stop(_ sender: Any) {
try! engine.stop()
player.stop()
}
}
</code></pre>
<p>但它在连接时不使用蓝牙麦克风和扬声器。所以，我只想优先考虑蓝牙耳塞，以便在连接时进行录制和播放，当它不是应用程序可以使用手机硬件时。
我玩过 <strong>AVAudioSessionCategoryPlayAndRecord</strong>，但我的试验都不起作用。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>似乎是我最后一次试用。 </p>
<pre><code> let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, with: .allowBluetooth)
try audioSession.setMode(AVAudioSessionModeDefault)
try audioSession.setActive(true)
} catch {
print(error)
}
</code></pre>
<p>现在我可以使用我的蓝牙耳塞进行录音和播放，而无需内置(iphone)麦克风或扬声器。这是完整的代码。</p>
<pre><code>import UIKit
import AVFoundation
class ViewController: UIViewController {
var engine = AVAudioEngine()
let player = AVAudioPlayerNode()
let audioSession = AVAudioSession.sharedInstance()
override func viewDidLoad() {
super.viewDidLoad()
do {
try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, with: .allowBluetooth)
try audioSession.setMode(AVAudioSessionModeDefault)
try audioSession.setActive(true)
} catch {
print(error)
}
let input = engine.inputNode!
engine.attach(player)
let bus = 0
let inputFormat = input.inputFormat(forBus: bus)
engine.connect(player, to: engine.mainMixerNode, format: inputFormat)
input.installTap(onBus: bus, bufferSize: 512, format: inputFormat) { (buffer, time) -> Void in
self.player.scheduleBuffer(buffer)
print(buffer)
}
}
@IBAction func start(_ sender: Any) {
do{
try! engine.start()
} catch {
print(error)
}
player.play()
}
@IBAction func stop(_ sender: Any) {
try! engine.stop()
player.stop()
}
}
</code></pre>
<p><em>在测试之前不要忘记连接 IBAction (开始和停止按钮)</em></p></p>
<p style="font-size: 20px;">关于ios - 使用 Avfoundation 在 Swift 中使用蓝牙耳机的麦克风和扬声器进行录制和播放，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/50236301/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/50236301/
</a>
</p>
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