带有拆分视图的自定义相机视图

Question

我创建了许多单帧到多帧的布局。我们应该在选择后选择任何一个布局。相机应该出现来拍照，帧将处于分视图中。如果我们选择一个有3帧的布局，并且我们正在为第二帧进行拾取，则不应应用第一个和第三个相机。我也看到了AVCam的示例代码，但没有得到正确的代码。如何使用自定义相机的分割图像。希望有人帮忙。

Answer 1

嗨，我通过AVFoundation框架得到了答案，我搜索了许多网站，还搜索了AVCam苹果示例。通过拍摄不同的视图和图像视图，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];
    }
});

[[self-session]startRuning]；

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