objective c - How to force iOS camera to take a picture programmatically using AVFoundation?

Question

I need the iOS camera to take a picture without any input from the user. How would I go about doing this? This is my code so far:

-(void)initCapture{
    AVCaptureDeviceInput *newVideoInput = [[AVCaptureDeviceInput alloc] init];

    AVCaptureStillImageOutput *newStillImageOutput = [[AVCaptureStillImageOutput alloc] init];

    NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:
                                AVVideoCodecJPEG, AVVideoCodecKey,
                                nil];


    [newStillImageOutput setOutputSettings:outputSettings];


    AVCaptureSession *newCaptureSession = [[AVCaptureSession alloc] init];

    if ([newCaptureSession canAddInput:newVideoInput]) {
        [newCaptureSession addInput:newVideoInput];
    }
    if ([newCaptureSession canAddOutput:newStillImageOutput]) {
        [newCaptureSession addOutput:newStillImageOutput];
    }
    self.stillImageOutput = newStillImageOutput;
}

What else do I need to add and where do I go from here? I don't want to take a video, only a single still image. Also, how would I convert the image into a UIImage afterwards? Thanks

Answer 1

https://developer.apple.com/library/mac/documentation/AVFoundation/Reference/AVCaptureSession_Class/Reference/Reference.html

Look at AVCaptureSession on how to take take picture without user input. You will need to add AVCaptureDevice for camera to the session.