详解iOS App中调用AVAudioPlayer播放音频文件的用法这篇文章主要介绍了iOS App中调用AVAudioPlayer播放音频文件的用法,AVAudioPlayer仅能播放本地文件而不能添加网络源,实例代码为Objective-C,需要的朋友可以参考下要给工程中添加音频,首先要导入音频的框架 AVFoundation.framework 然后新建一个类继承于UIViewController, 我这里就叫FirstVC. 首先在 AppDelegate.m中初始化根视图 复制代码 代码如下: #import "AppDelegate.h" #import "FirstVC.h" @implementation AppDelegate - (void)dealloc { [_window release]; [super dealloc]; } - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; // Override point for customization after application launch. FirstVC *firstVC = [[FirstVC alloc] init]; self.window.rootViewController = firstVC; [firstVC release]; backgroundColor = [UIColor whiteColor]; [self.window makeKeyAndVisible]; return YES; } 然后在FirstVC.h中导入AVFoundation框架 复制代码 代码如下: #import //要想使用封装好的音频类,导入框,导入类头文件,缺一不可; #import @interface FirstVC : UIViewController { AVAudioPlayer *avAudioPlayer; //播放器player UIProgressView *progressV; //播放进度 UISlider *volumeSlider; //声音控制 NSTimer *timer; //监控音频播放进度 } @end 然后在FirstVC.m里的viewDidLoad方法里填写代码 你需要导入一个音频才可以播放 像添加图片一样,直接拖到工程里就可以了 复制代码 代码如下: - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. //初始化三个button UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button setFrame:CGRectMake(100, 100, 60, 40)]; [button setTitle:@"Play" forState:UIControlStateNormal]; [button addTarget:self action:@selector(play) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button]; UIButton *button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button1 setFrame:CGRectMake(100, 150, 60, 40)]; [button1 setTitle:@"pause" forState:UIControlStateNormal]; [button1 addTarget:self action:@selector(pause) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button1]; UIButton *button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button2 setFrame:CGRectMake(100, 200, 60, 40)]; [button2 setTitle:@"stop" forState:UIControlStateNormal]; [button2 addTarget:self action:@selector(stop) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button2]; //从budle路径下读取音频文件 轻音乐 - 萨克斯回家 这个文件名是你的歌曲名字,mp3是你的音频格式 NSString *string = [[NSBundle mainBundle] pathForResource:@"轻音乐 - 萨克斯回家" ofType:@"mp3"]; //把音频文件转换成url格式 NSURL *url = [NSURL fileURLWithPath:string]; //初始化音频类 并且添加播放文件 avAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil]; //设置代理 avAudioPlayer.delegate = self; //设置初始音量大小 // avAudioPlayer.volume = 1; //设置音乐播放次数 -1为一直循环 avAudioPlayer.numberOfLoops = -1; //预播放 [avAudioPlayer prepareToPlay]; //初始化一个播放进度条 progressV = [[UIProgressView alloc] initWithFrame:CGRectMake(20, 50, 200, 20)]; [self.view addSubview:progressV]; [progressV release]; //用NSTimer来监控音频播放进度 timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(playProgress) userInfo:nil repeats:YES]; //初始化音量控制 volumeSlider = [[UISlider alloc] initWithFrame:CGRectMake(20, 70, 200, 20)]; [volumeSlider addTarget:self action:@selector(volumeChange) forControlEvents:UIControlEventValueChanged]; //设置最小音量 volumeSlider.minimumValue = 0.0f; //设置最大音量 volumeSlider.maximumValue = 10.0f; //初始化音量为多少 volumeSlider.value = 5.0f; [self.view addSubview:volumeSlider]; [volumeSlider release]; //声音开关控件(静音) UISwitch *swith = [[UISwitch alloc] initWithFrame:CGRectMake(100, 20, 60, 40)]; [swith addTarget:self action:@selector(onOrOff:) forControlEvents:UIControlEventValueChanged]; //默认状态为打开 swith.on = YES; [self.view addSubview:swith]; [swith release]; } 相应的自定义方法代码如下 复制代码 代码如下: //播放 - (void)play { [avAudioPlayer play]; } //暂停 - (void)pause { [avAudioPlayer pause]; } //停止 - (void)stop { avAudioPcurrentTime = 0; //当前播放时间设置为0 [avAudioPlayer stop]; } //播放进度条 - (void)playProgress { //通过音频播放时长的百分比,给progressview进行赋值; progressV.progress = avAudioPlayer.currentTime/avAudioPlayer.duration; } //声音开关(是否静音) - (void)onOrOff:(UISwitch *)sender { avAudioPlayer.www.sm136.。
