I'm trying to make a camera app using AVCaptureSession. For now I just want to see if the video input works or not. But it looks like there is no input and I can't seem to understand why.
- (void)viewDidLoad
{
[super viewDidLoad];
session = [[AVCaptureSession alloc] init];
[self addVideoPreviewLayer];
CGRect layerRect = [[[self view] layer] bounds];
[[self previewLayer] setBounds:layerRect];
[[self previewLayer] setPosition:CGPointMake(CGRectGetMidX(layerRect),
CGRectGetMidY(layerRect))];
[[[self view] layer] addSublayer:[self previewLayer]];
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
myButton.frame = CGRectMake(80, 320, 200, 44);
[myButton setTitle : @"Click Me!" forState:UIControlStateNormal];
[myButton addTarget:self action: @selector(scanButtonPressed) forControlEvents:UIControlEventTouchDown];
[self.view addSubview:myButton];
}
-(void)addVideoPreviewLayer{
[self setPreviewLayer:[[[AVCaptureVideoPreviewLayer alloc] initWithSession:[self session]] autorelease]];
[[self previewLayer] setVideoGravity:AVLayerVideoGravityResizeAspectFill];
}
-(void) addVideoInput{
AVCaptureDevice *videoDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if (videoDevice) {
NSError *error;
AVCaptureDeviceInput *videoIn = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error];
if (!error) {
if ([[self session] canAddInput:videoIn])
[[self session] addInput:videoIn];
else
NSLog(@"Couldn't add video input");
}
else
NSLog(@"Couldn't create video input");
}
else
NSLog(@"Couldn't create video capture device");
}
-(IBAction)scanButtonPressed{
[self addVideoInput];
}
