ios - 带有 Split View的自定义相机 View

Question

我创建了许多单帧到多帧的布局。我们应该在选择相机出现后选择任何布局来拍照，帧将以 Split View显示。如果我们选择一个有 3 个帧的布局，我们正在拍摄选择第二帧，不应该应用第一和第三个相机。我也看到了 AVCam 示例代码，但没有得到正确的代码。如何为自定义相机使用分割图像。希望有人帮忙。

Answer 1

您好，我通过 AVFoundation 框架得到了答案，我搜索了很多网站以及 AVCam apple 示例。通过采用不同的 View 和 ImageView ，我了解了在哪里使用相机预览

 dispatch_queue_t sessionQueue = dispatch_queue_create("session queue",  DISPATCH_QUEUE_SERIAL);
 [self setSessionQueue:sessionQueue];

  dispatch_async(sessionQueue, ^{
  [self setBackgroundRecordingID:UIBackgroundTaskInvalid];
  NSError *error = nil;
  AVCaptureDevice *videoDevice = [SecondViewController deviceWithMediaType:AVMediaTypeVideo preferringPosition:AVCaptureDevicePositionBack];
  AVCaptureDeviceInput *videoDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error];
  if (error)
    {
        NSLog(@"%@", error);
    }

    if ([session canAddInput:videoDeviceInput])
    {
        [session addInput:videoDeviceInput];
        [self setVideoDeviceInput:videoDeviceInput];

        dispatch_async(dispatch_get_main_queue(), ^{
       [[(AVCaptureVideoPreviewLayer *)[[self previewView] layer] connection] setVideoOrientation:(AVCaptureVideoOrientation)[self interfaceOrientation]];
        });
    }

    AVCaptureDevice *audioDevice = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject];
    AVCaptureDeviceInput *audioDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:audioDevice error:&error];

    if (error)
    {
        NSLog(@"%@", error);
    }

    if ([session canAddInput:audioDeviceInput])
    {
        [session addInput:audioDeviceInput];
    }

    AVCaptureMovieFileOutput *movieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
    if ([session canAddOutput:movieFileOutput])
    {
        [session addOutput:movieFileOutput];
        AVCaptureConnection *connection = [movieFileOutput connectionWithMediaType:AVMediaTypeVideo];
        if ([connection isVideoStabilizationSupported])
            [connection setEnablesVideoStabilizationWhenAvailable:YES];
        [self setMovieFileOutput:movieFileOutput];
    }

    AVCaptureStillImageOutput *stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
    if ([session canAddOutput:stillImageOutput])
    {
        [stillImageOutput setOutputSettings:@{AVVideoCodecKey : AVVideoCodecJPEG}];
        [session addOutput:stillImageOutput];
        [self setStillImageOutput:stillImageOutput];
    }
});

[[自 session ] 开始运行];

通过使用这段代码和一些重要的方法，如 deviceWithMediaType、setFlashMode，我得到了我的解决方案