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iOS8 音を鳴らす

Last updated at Posted at 2015-08-13

準備:mp3音源をプロジェクトに追加(プロジェクトフォルダ右区rックで追加)

1、音源へのパスを生成
2、AVAudioPlayerのインスタンス化
3、AVAudioPlayerのデリゲートを設定
4、タップしたときに音を鳴らす止めるなどの処理
5、イベント処理

:exclamation:注意点:exclamation:
xcode7betaでは「2、AVAudioPlayerのインスタンス化」で例外処理を記載しないとビルドエラーになる
 

//
//  ViewController.swift
//  sousa
//
//  Created by Misato Morino on 2015/08/13.
//  Copyright (c) 2015年 Atsushi Komuro. All rights reserved.
//

import UIKit
import AVFoundation

//AudioPlayerDelegate
class ViewController: UIViewController,AVAudioPlayerDelegate {
    
    //変数宣言.
    var myAudioPlayer : AVAudioPlayer! = nil
    var myButton : UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        //再生する音源のURLを生成.
        let soundFilePath : NSString = NSBundle.mainBundle().pathForResource("Sample", ofType: "mp3")!
        let fileURL : NSURL = NSURL(fileURLWithPath: soundFilePath as String)
        
        //AVAudioPlayerのインスタンス化
        do{
            myAudioPlayer = try AVAudioPlayer(contentsOfURL: fileURL, fileTypeHint:nil)
        }catch{
            print("Failed AVAudioPlayer Instance")
        }
        
        //AVAudioPlayerのデリゲートをセット.
        myAudioPlayer.delegat = self
        
        //ボタンの生成
        myButton = UIButton()
        myButton.frame.size = CGSizeMake(100, 100)
        myButton.layer.position = CGPoint(x: self.view.frame.width/2, y: self.view.frame.height/2)
        myButton.setTitle("▶︎", forState: UIControlState.Normal)
        myButton.setTitleColor(UIColor.blackColor(), forState: .Normal)
        myButton.backgroundColor = UIColor.cyanColor()
        myButton.addTarget(self, action: "onClickMyButton:", forControlEvents: UIControlEvents.TouchUpInside)
        myButton.layer.masksToBounds = true
        myButton.layer.cornerRadius = 50.0
        self.view.addSubview(myButton)
    }
    
    //ボタンがタップされた時に呼ばれるメソッド.
    func onClickMyButton(sender: UIButton) {
        
        //playingプロパティがtrueであれば音源再生中.
        if myAudioPlayer.playing == true {
            
            //myAudioPlayerを一時停止.
            myAudioPlayer.pause()
            sender.setTitle("▶︎", forState: .Normal)
        } else {
            
            //myAudioPlayerの再生.
            myAudioPlayer.play()
            sender.setTitle("■", forState: .Normal)
        }
    }
    
    //音楽再生が成功した時に呼ばれるメソッド.
    func audioPlayerDidFinishPlaying(player: AVAudioPlayer, successfully flag: Bool) {
        print("Music Finish")
        
        //再度myButtonを"▶︎"に設定.
        myButton.setTitle("▶︎", forState: .Normal)
    }
    
    //デコード中にエラーが起きた時に呼ばれるメソッド.
    func audioPlayerDecodeErrorDidOccur(player: AVAudioPlayer, error: NSError?) {
        print("Error")
    }
}
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