我是 AVFoundation 的新手，我正在尝试使用 AVFoundation 实现摄像机，这是我的基本设置。基本上，当您单击按钮时，它将调用 showCamera 方法。在这里我创建会话，然后添加音频输入和视频输入，然后添加视频输出。
我在哪里添加 AVCaptureConnection，我该怎么做？是否有一些教程显示如何使用连接？任何帮助表示赞赏。
- (IBAction) showCamera
{
//Add the camview to the current view ontop of controller
[[[[[UIApplication sharedApplication] delegate] self] window] addSubview:camView];
session = [[AVCaptureSession alloc] init];
//Set preset on session to make recording scale high
if ([session canSetSessionPreset:AVCaptureSessionPresetHigh]) {
session.sessionPreset = AVCaptureSessionPresetHigh;
}
// Add inputs and outputs.
NSArray *devices = [AVCaptureDevice devices];
//Print out all devices on phone
for (AVCaptureDevice *device in devices)
{
if ([device hasMediaType:AVMediaTypeVideo])
{
if ([device position] == AVCaptureDevicePositionBack)
{
//Add Rear Video input to session
[self addRearCameraInputToSession:session withDevice:device];
}
}
else if ([device hasMediaType:AVMediaTypeAudio])
{
//Add Microphone input to session
[self addMicrophoneInputToSession:session withDevice:device];
}
else
{
//Show error that your camera does not have a phone
}
}
//Add movie output
[self addMovieOutputToSession:session];
//Construct preview layer
[self constructPreviewLayerWithSession:session onView:camView];
}