以下是用swift写的一个录音demo, 把声音录制保存到沙盒里, 并获得声音的分贝值大小. (亲测可用!)
importUIKit
importAVFoundation
classViewController:UIViewController{
//定义录音器
varrecord:AVAudioRecorder?
//定义定时器,用来获得声音的分贝大小,显示到界面
vartimer:CADisplayLink?
overridefuncviewDidLoad(){
super.viewDidLoad()
}
}
extensionViewController{
@IBActionfuncbeginRecord(sender:UIButton){
//1.获取录制文件的存放的路径
letfilePath=NSSearchPathForDirectoriesInDomains(.DocumentDirectory,.UserDomainMask,true)[0]
letfileName=filePath.stringByAppendingString("/woailo.wav")
guardletfileURL=NSURL(string:fileName)else{
return
}
//2.创建录制音频的对象44100-->8000
guardletrecord=try?AVAudioRecorder(URL:fileURL,settings:[AVSampleRateKey:80000])else{
return
}
self.record=record
//3.开始录制
record.record()
print(fileURL)
print(fileName)
//4.测试声音的大小
record.meteringEnabled=true
//4.开启定时器
timer=CADisplayLink(target:self,selector:#selector(getVolumePower))
timer?.addToRunLoop(NSRunLoop.mainRunLoop(),forMode:NSRunLoopCommonModes)
}
@objcprivatefuncgetVolumePower(){
//updateMeters要和averagePowerForChannel配合使用
record?.updateMeters()
letpowerLeval=record?.averagePowerForChannel(0)
print(powerLeval)
}
@IBActionfuncstopRecord(sender:UIButton){
record?.stop()
timer?.invalidate()
timer=nil
}
}
