IOS 录音与播放

import UIKit
import AVFoundation

class ViewController: UIViewController {

var avRec:AVAudioRecorder!
var audioFileUrl:NSURL!
var avPlayer:AVAudioPlayer!
var recordSetting:[String : AnyObject] = ["":""] //nil不可用时

@IBAction func startRec(sender: AnyObject) {

print("start rec")

avRec.record()//开始录制
}
@IBAction func stopRec(sender: AnyObject) {

print("stop rec")

avRec.stop()//停止录制
}
@IBAction func playRec(sender: AnyObject) {

print("play rec")
//创建avPlayer
avPlayer = try? AVAudioPlayer(contentsOfURL: audioFileUrl)
avPlayer.prepareToPlay()//准备播放
avPlayer.play()//播放录制
}

override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//创建一个URL
//DocumentDirectory文档目录
//inDomains所在的域
//(NSFileManager.defaultManager().URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.AllDomainsMask)[0] as NSURL).
//找到文档名字
//URLByAppendingPathComponent创建文件
audioFileUrl = (NSFileManager.defaultManager().URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.AllDomainsMask)[0] as NSURL).URLByAppendingPathComponent("rec")

avRec = try? AVAudioRecorder.init(URL: audioFileUrl!, settings: recordSetting)      //URL存放录音文件的地址

avRec.prepareToRecord()//开始准备路径

}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}

}