李洪强iOS开发之录音和播放实现

//首先导入框架后,导入头文件.以下内容为托控件,在storyboard中拖出两个按钮为录音和播放按钮

//创建一个UIViewController在.h文件中写

#import<UIKit/UIKit.h>

#import<AVFoundation/AVFoundation.h>

@interface ViewController : UIViewController

//录音存储路径

@property (nonatomic, strong)NSURL *tmpFile;

//录音

@property (nonatomic, strong)AVAudioRecorder*recorder;

//播放

@property (nonatomic, strong)AVAudioPlayer *player;

//录音状态(是否录音)

@property (nonatomic, assign)BOOL isRecoding;

@end

//在.m文件中写

#import "ViewController.h"

//添加代理

@interface ViewController ()<AVAudioPlayerDelegate>

//录音按钮

@property (weak, nonatomic) IBOutlet UIButton*recordButton;

//播放按钮

@property (weak, nonatomic) IBOutlet UIButton*playButton;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

//刚打开的时候录音状态为不录音

self.isRecoding = NO;

//播放按钮不能被点击

[self.playButton setEnabled:NO];

//播放按钮设置成半透明

self.playButton.titleLabel.alpha = 0.5;

//创建临时文件来存放录音文件

self.tmpFile = [NSURL fileURLWithPath:[NSTemporaryDirectory()stringByAppendingString:@"TmpFile"]];

//设置后台播放

AVAudioSession *session = [AVAudioSessionsharedInstance];

NSError *sessionError;

[sessionsetCategory:AVAudioSessionCategoryPlayAndRecorderror:&sessionError];

//判断后台有没有播放

if (session == nil) {

NSLog(@"Error creating sessing:%@", [sessionError description]);

} else {

[session setActive:YES error:nil];

}

//录音按钮方法的实现

- (IBAction)startStopRecord:(id)sender {

//判断当录音状态为不录音的时候

if (!self.isRecoding) {

//将录音状态变为录音

self.isRecoding = YES;

//将录音按钮变为停止

[self.recordButton setTitle:@"停止"forState:UIControlStateNormal];

//播放按钮不能被点击

[self.playButton setEnabled:NO];

self.playButton.titleLabel.alpha = 0.5;

//开始录音,将所获取到得录音存到文件里

self.recorder = [[AVAudioRecorder alloc]initWithURL:_tmpFile settings:nil error:nil];

//准备记录录音

[_recorder prepareToRecord];

//启动或者恢复记录的录音文件

[_recorder record];

_player = nil;

} else {

//录音状态点击录音按钮停止录音

self.isRecoding = NO;

[self.recordButton setTitle:@"录音"forState:UIControlStateNormal];

//录音停止的时候,播放按钮可以点击

[self.playButton setEnabled:YES];

[self.playButton.titleLabel setAlpha:1];

//停止录音

[_recorder stop];

_recorder = nil;

&nnbsp;

NSError *playError;

self.player = [[AVAudioPlayer alloc]initWithContentsOfURL:_tmpFile error:&playError];

//当播放录音为空, 打印错误信息

if (self.player == nil) {

NSLog(@"Error crenting player: %@", [playError description]);

}

self.player.delegate = self;

}

//播放按钮方法的实现

- (IBAction)playPause:(id)sender {

//判断是否正在播放,如果正在播放

if ([self.player isPlaying]) {

//暂停播放

[_player pause];

//按钮显示为播放

[self.playButton setTitle:@"播放"forState:UIControlStateNormal];

} else {

//开始播放

[_player play];

[self.playButton setTitle:@"暂停"forState:UIControlStateNormal];

}

//当播放结束后调用这个方法

- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer*)player successfully:(BOOL)flag

{

//按钮标题变为播放

[self.playButton setTitle:@"播放"forState:UIControlStateNormal];

}

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李洪强iOS开发之录音和播放实现

李洪强iOS开发之录音和播放实现

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