IOS学习：AVAudioPlayer播放音乐文件及读取ipod库中的音乐文件
首先要导入AVFoundation框架及
下面是代码，代码中都有注释：
[cpp] view plaincopy
-
//
-
// RootViewController.h
-
// SoundDemo
-
//
-
// Created by on 13-6-21.
-
// Copyright (c) 2013年 DoubleMan. All rights reserved.
-
//
-
-
#import <UIKit/UIKit.h>
-
#import <AVFoundation/AVFoundation.h>
-
#import <MediaPlayer/MediaPlayer.h>
-
-
@interface RootViewController : UIViewController <AVAudioPlayerDelegate>
-
{
-
AVAudioPlayer *player;
-
}
-
-
@property (nonatomic, retain) AVAudioPlayer *player;
-
@property (nonatomic, retain) UISlider *slider;
-
@property (nonatomic, retain) NSTimer *timer;
-
-
@end
[cpp] view plaincopy
-
//
-
// RootViewController.m
-
// SoundDemo
-
//
-
// Created by on 13-6-21.
-
// Copyright (c) 2013年 DoubleMan. All rights reserved.
-
//
-
-
#import “RootViewController.h”
-
-
@interface RootViewController ()
-
-
@end
-
-
@implementation RootViewController
-
-
@synthesize player;
-
@synthesize slider;
-
@synthesize timer;
-
-
– (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
-
{
-
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
-
if (self) {
-
// Custom initialization
-
-
-
}
-
return self;
-
}
-
-
– (void)viewDidLoad
-
{
-
[super viewDidLoad];
-
-
UIButton *musicPlay = [UIButton buttonWithType:UIButtonTypeRoundedRect];
-
musicPlay.frame = CGRectMake(10, 10, 90, 35);
-
[musicPlay setTitle:@“Play” forState:UIControlStateNormal];
-
[musicPlay addTarget:self action:@selector(playMusic) forControlEvents:UIControlEventTouchUpInside];
-
[self.view addSubview:musicPlay];
-
-
UIButton *pause = [UIButton buttonWithType:UIButtonTypeRoundedRect];
-
pause.frame = CGRectMake(115, 10, 90, 35);
-
[pause setTitle:@“Pause” forState:UIControlStateNormal];
-
[pause addTarget:self action:@selector(pause) forControlEvents:UIControlEventTouchUpInside];
-
[self.view addSubview:pause];
-
-
UIButton *stop = [UIButton buttonWithType:UIButtonTypeRoundedRect];
-
stop.frame = CGRectMake(220, 10, 90, 35);
-
[stop setTitle:@“stop” forState:UIControlStateNormal];
-
[stop addTarget:self action:@selector(stop) forControlEvents:UIControlEventTouchUpInside];
-
[self.view addSubview:stop];
-
-
slider = [[UISlider alloc] initWithFrame:CGRectMake(10, 65, 300, 20)];
-
[slider addTarget:self action:@selector(sliderValueChange:) forControlEvents:UIControlEventValueChanged];
-
[self.view addSubview:slider];
-
-
//
-
NSString *path = [[NSBundle mainBundle] pathForResource:@“找一个相爱的理由-晨熙-艾歌” ofType:@“wav”];
-
NSURL *url = [NSURL fileURLWithPath:path];
-
player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
-
// 设置循环次数，-1为一直循环
-
player.numberOfLoops = -1;
-
// 准备播放
-
[player prepareToPlay];
-
// 设置播放音量
-
player.volume = 50;
-
// 当前播放位置，即从currentTime处开始播放，相关于android里面的seekTo方法
-
player.currentTime = 15;
-
// 设置代理
-
player.delegate = self;
-
int dur = player.duration;
-
slider.maximumValue = dur;
-
-
// 一秒一次更新播放进度
-
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(updateSlider) userInfo:nil repeats:YES];
-
-
// 从ipod库中读出音乐文件
-
// MPMediaQuery *everything = [[MPMediaQuery alloc] init];
-
// // 读取条件
-
// MPMediaPropertyPredicate *albumNamePredicate =
-
// [MPMediaPropertyPredicate predicateWithValue:[NSNumber numberWithInt:MPMediaTypeMusic ] forProperty: MPMediaItemPropertyMediaType];
-
// [everything addFilterPredicate:albumNamePredicate];
-
//
-
// NSLog(@”Logging items from a generic query…”);
-
// NSArray *itemsFromGenericQuery = [everything items];
-
// for (MPMediaItem *song in itemsFromGenericQuery) {
-
// NSString *songTitle = [song valueForProperty: MPMediaItemPropertyTitle];
-
// NSLog (@”%@”, songTitle);
-
// }
-
//
-
// [everything release];
-
}
-
-
// 更新播放进度
-
– (void)updateSlider {
-
slider.value = player.currentTime;
-
}
-
-
// 进度滑块变化时，跳转到进度播放
-
– (void)sliderValueChange:(UISlider *)mSlider {
-
player.currentTime = mSlider.value;
-
NSLog(@“value: %.0f”, mSlider.value);
-
}
-
-
// 停止
-
– (void)stop {
-
player.currentTime = 0;
-
[player stop];
-
}
-
-
// 暂停
-
– (void)pause {
-
[player pause];
-
NSLog(@“pause”);
-
}
-
-
// 开始播放
-
– (void)playMusic {
-
NSLog(@“start play”);
-
[player play];
-
}
-
-
#pragma mark – AVAudioPlayerDelegate
-
– (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
-
// 播放完成时调用 只有当播放结束时才会调用，循环播放时不会调
-
[timer invalidate];
-
NSLog(@“audioPlayerDidFinishPlaying”);
-
}
-
-
/* if an error occurs while decoding it will be reported to the delegate. */
-
– (void)audioPlayerDecodeErrorDidOccur:(AVAudioPlayer *)player error:(NSError *)error {
-
// 解码出错时调用
-
}
-
-
– (void)didReceiveMemoryWarning
-
{
-
[super didReceiveMemoryWarning];
-
// Dispose of any resources that can be recreated.
-
}
-
-
– (void)dealloc
-
{
-
[player stop];
-
[player release];
-
[slider release];
-
[timer release];
-
[super dealloc];
-
}
-
-
@end
-
上一篇IOS学习:用UIWindow自定义AlertView（最基本代码）
-
下一篇IOS开发学习:MKMapView自定义CalloutView
-
顶
-
2
-
踩
