Hi,
bin grad dabei ein App zu programmieren ähnlich wie Hipstamatic. Habe schon alle Grafken gemacht die ich benötige weis jedoch nicht wie ich die Kamera einbauen soll. Ich brauche einen Previewlayer und eine Take Picture funktion, kann mir jemand dabei helfen ?

AvFoundation klingt schon besser aber ich hab null ahnung was ich schreiben muss und welche frameworks ich hinzufügen muss kannst du mir helfen ?

Capturing Still Images
You use an AVCaptureStillImageOutput
output if you want to capture still images with accompanying metadata.
The resolution of the image depends on the preset for the session, as
illustrated in this table:

Preset
iPhone 3G
iPhone 3GS
iPhone 4 (Back)
iPhone 4 (Front)
High
400x304
640x480
1280x720
640x480
Medium
400x304
480x360
480x360
480x360
Low
400x304
192x144
192x144
192x144
640x480
N/A
640x480
640x480
640x480
1280x720
N/A
N/A
1280x720
N/A
Photo
1600x1200
2048x1536
2592x1936
640x480

Pixel and Encoding Formats
Different devices support different image formats:

iPhone 3G
iPhone 3GS
iPhone 4
yuvs, 2vuy, BGRA, jpeg
420f, 420v, BGRA, jpeg
420f, 420v, BGRA, jpeg

You can find out what pixel and codec types are supported using availableImageDataCVPixelFormatTypes and availableImageDataCodecTypes respectively. You set the outputSettings dictionary to specify the image format you want, for example:

AVCaptureStillImageOutput *stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys:
AVVideoCodecJPEG, AVVideoCodecKey, nil];
[stillImageOutput setOutputSettings:outputSettings];

If
you want to capture a JPEG image, you should typically not specify your
own compression format. Instead, you should let the still image output
do the compression for you, since its compression is
hardware-accelerated. If you need a data representation of the image,
you can use Capturing an Image
When you want to capture an image, you send the output a captureStillImageAsynchronouslyFromConnection:completionHandler:
message. The first argument is the connection you want to use for the
capture. You need to look for the connection whose input port is
collecting video:

AVCaptureConnection *videoConnection = nil;
for (AVCaptureConnection *connection in stillImageOutput.connections) {
for (AVCaptureInputPort *port in [connection inputPorts]) {
if ([[port mediaType] isEqual:AVMediaTypeVideo] ) {
videoConnection = connection;
break;
}
}
if (videoConnection) { break; }
}

The second argument to captureStillImageAsynchronouslyFromConnection:completionHandler: is a block
that takes two arguments: a CMSampleBuffer containing the image data,
and an error. The sample buffer itself may contain metadata, such as an
Exif dictionary, as an attachment. You can modify the attachments should
you want, but note the optimization for JPEG images discussed in Showing the User What’s Being Recorded
You
can provide the user with a preview of what’s being recorded by the
camera using a preview layer, or by the microphone by monitoring the
audio channel.
Video Preview
You can provide the user with a preview of what’s being recorded using an AVCaptureVideoPreviewLayer object. AVCaptureVideoPreviewLayer is a subclass ofCALayer (see Core Animation Programming Guide. You don’t need any outputs to show the preview.
Unlike
a capture output, a video preview layer retains the session with which
it is associated. This is to ensure that the session is not deallocated
while the layer is attempting to display video. This is reflected in the
way you initialize a preview layer:

AVCaptureSession *captureSession = <#Get a capture session#>;
CALayer *viewLayer = <#Get a layer from the view in which you want to present the preview#>;

AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:captureSession];
[viewLayer addSublayer:captureVideoPreviewLayer];

In general, the preview layer behaves like any other CALayer object in the render tree (see Core Animation Programming Guide).
You can scale the image and perform transformations, rotations and so
on just as you would any layer. One difference is that you may need to
set the layer’s orientation
property to specify how it should rotate images coming from the camera.
In addition, on iPhone 4 the preview layer supports mirroring (this is
the default when previewing the front-facing camera).
Video Gravity Modes
The preview layer supports three gravity modes that you set using Using “Tap to Focus” With a Preview
You
need to take care when implementing tap-to-focus in conjunction with a
preview layer. You must account for the preview orientation and gravity
of the layer, and the possibility that the preview may be mirrored.
Vielen Dank .
Ich glaub das ist was ich benötige aber da ich neu in der scene bin verstehe ich nur Bahnhof Was genau muss ich den in meinen ViewController.h und .m einfügen?