获取手机音量
import AudioToolbox
let audioSession = AVAudioSession.sharedInstance()
let volume = audioSession.outputVolume
监听手机音量变化
do {
try audioSession.setActive(true)
audioSession.addObserver(self, forKeyPath: "outputVolume", options: .new, context: nil)
} catch let error {
print(error.localizedDescription)
}
监听方法
override func observeValue(forKeyPath keyPath: String?,
of object: Any?,
change: [NSKeyValueChangeKey : Any]?,
context: UnsafeMutableRawPointer?) {
if keyPath == "outputVolume" {
print(change?[.newKey]! as Any)
}
}
设置音量
let volumeView = MPVolumeView()
var slider :UISlider?
override func viewDidLoad() {
super.viewDidLoad()
MPVolumeSettingsAlertHide()//隐藏音量提示框
view.addSubview(volumeView)
let subviews = volumeView.subviews.filter({ (view) -> Bool in
print(view)
return (NSStringFromClass(type(of: view)) == "MPVolumeSlider")
})
if subviews.count > 0 {
slider = subviews.first as? UISlider
slider?.setValue(1, animated: true)//设置音量
print("\(slider!.value)")
}
}
