概述：
可用于音頻、二維碼、拍照、錄制視頻 （均可自定義界面）
常見的輸出信號：
AVCaptureMovieFileOutput輸出流實現視頻錄制
初始化會話層
-(void)sessionConfiguration{ //初始化一個會話 session = [[AVCaptureSession alloc] init]; [session setSessionPreset:AVCaptureSessionPresetMedium]; //創建視頻設備 AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; //根據設備創建輸入信號 deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:nil]; //添加 輸出設備 movieFile self.deviceMovieFileOutput = [[AVCaptureMovieFileOutput alloc] init]; [session beginConfiguration]; //session添加設備輸入信號 if ([session canAddInput:deviceInput]) { [session addInput:deviceInput]; } //session添加設備輸出信號 if ([session canAddOutput:self.deviceMovieFileOutput]) { [session addOutput:self.deviceMovieFileOutput]; } [session commitConfiguration];}創建預覽圖層
-(void)embedLayerWithView:(UIView *)view{ if (session == nil) { return; } videoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:session]; //設置圖層的大小 videoPreviewLayer.frame = view.bounds; videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; [view.layer addSublayer:videoPreviewLayer]; [session startRunning];}錄制視頻
-(void)takePhoto:(NSURL *)fileURL{ [self.deviceMovieFileOutput startRecordingToOutputFileURL:fileURL recordingDelegate:self];}結束錄制
-(UIImageView *)finishRecord:(UIView *)view isAnewRecording:(BOOL)anewRecording{ gifImageView = [[UIImageView alloc] initWithFrame:view.bounds]; [view addSubview:gifImageView]; isAnewRecording = anewRecording; //存儲是否重新錄制 //停止錄制(停止錄制后做代理方法) [self.deviceMovieFileOutput stopRecording]; return gifImageView;}拍攝視頻保存路徑
+(NSString *)getVideoSaveFilePath{ NSString*documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]; NSString *filePath = [documentPath stringByAppendingPathComponent:@"video.mp4"]; return filePath;}會話層啟動和關閉
-(void)startCamera{ [session startRunning];}-(void)stopCamera{ [session stopRunning];}代理方法
- (void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error{ NSLog(@"完成錄制"); NSLog(@"outputFileURL = %@",outputFileURL); //**重新錄制**// if (isAnewRecording) { //**刪除視頻文件**// NSFileManager *manager = [NSFileManager defaultManager]; [manager removeItemAtPath:outputFileURL.absoluteString error:nil]; } //**不取消錄制**// else{ //**獲取視頻時長**// AVURLAsset *avUrl = [AVURLAsset URLAssetWithURL:outputFileURL options:nil]; CMTime time = [avUrl duration]; int seconds = ceil(time.value/time.timescale); NSLog(@"seconds = %d",seconds); if ([self.delegate respondsToSelector:@selector(videoDuration:)]) { [self.delegate videoDuration:seconds]; } if ([self.delegate respondsToSelector:@selector(playerVideo:)]) { [self.delegate playerVideo:outputFileURL.absoluteString]; } }}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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