iOS中录音和播放实现
//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
#import
@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 = [AVAudioSession sharedInstance];
NSError *sessionError;
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&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;
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];
}