PBJVision 快速在应用中集成相机/拍摄功能

pod 'PBJVision'

#import "PBJVision.h"

    // 预览视图和视频图层.
    _previewView = [[UIView alloc] initWithFrame:CGRectZero];
    _previewView.backgroundColor = [UIColor blackColor];
    CGRect previewFrame = CGRectMake(0, 60.0f, CGRectGetWidth(self.view.frame), CGRectGetWidth(self.view.frame));
    _previewView.frame = previewFrame;
    _previewLayer = [[PBJVision sharedInstance] previewLayer];
    _previewLayer.frame = _previewView.bounds;
    _previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    [_previewView.layer addSublayer:_previewLayer];

- (void)_setup
{
    _longPressGestureRecognizer.enabled = YES;

    PBJVision *vision = [PBJVision sharedInstance];
    vision.delegate = self;
    vision.cameraMode = PBJCameraModeVideo;
    vision.cameraOrientation = PBJCameraOrientationPortrait;
    vision.focusMode = PBJFocusModeContinuousAutoFocus;
    vision.outputFormat = PBJOutputFormatSquare;

    [vision startPreview];
}

- (void)_handleLongPressGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
{
    switch (gestureRecognizer.state) {
      case UIGestureRecognizerStateBegan:
        {
            if (!_recording)
                [[PBJVision sharedInstance] startVideoCapture];
            else
                [[PBJVision sharedInstance] resumeVideoCapture];
            break;
        }
      case UIGestureRecognizerStateEnded:
      case UIGestureRecognizerStateCancelled:
      case UIGestureRecognizerStateFailed:
        {
            [[PBJVision sharedInstance] pauseVideoCapture];
            break;
        }
      default:
        break;
    }
}

    [[PBJVision sharedInstance] endVideoCapture];

- (void)vision:(PBJVision *)vision capturedVideo:(NSDictionary *)videoDict error:(NSError *)error
{   
    if (error && [error.domain isEqual:PBJVisionErrorDomain] && error.code == PBJVisionErrorCancelled) {
        NSLog(@"退出录制");
        return;
    } else if (error) {
        NSLog(@"视频录制时发生错误 (%@)", error);
        return;
    }

    _currentVideo = videoDict;

    NSString *videoPath = [_currentVideo  objectForKey:PBJVisionVideoPathKey];
    [_assetLibrary writeVideoAtPathToSavedPhotosAlbum:[NSURL URLWithString:videoPath] completionBlock:^(NSURL *assetURL, NSError *error1) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"视频已保存!" message: @"保存到缓存目录tmp中."
                                                       delegate:self
                                              cancelButtonTitle:nil
                                              otherButtonTitles:@"好", nil];
        [alert show];
    }];
}

    [[PBJVision sharedInstance] setMaximumCaptureDuration:CMTimeMakeWithSeconds(5, 600)]; // 最多5秒.

    @property (nonatomic, copy) NSString *captureSessionPreset;

    @property (nonatomic) CGFloat videoBitRate;
    @property (nonatomic) NSInteger audioBitRate;
    @property (nonatomic) NSDictionary *additionalCompressionProperties;