How to custom size AVcapture - swift

Question

I need to capture for my barcode But this my code capture is full screen.
How to custom size or fix to small size.
please let my idea or code for custom size this thank you.
This my code capture is full screen.
import UIKit
import AVFoundation
protocol BarcodeDelegate {
func barcodeReaded(barcode: String)
}
class barcodeCapViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate {
var delegate: BarcodeDelegate?
var captureSession: AVCaptureSession!
var code: String?
override func viewDidLoad() {
super.viewDidLoad()
self.captureSession = AVCaptureSession();
let videoCaptureDevice: AVCaptureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
do {
let videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice)
if self.captureSession.canAddInput(videoInput) {
self.captureSession.addInput(videoInput)
} else {
print("Could not add video input")
}
let metadataOutput = AVCaptureMetadataOutput()
if self.captureSession.canAddOutput(metadataOutput) {
self.captureSession.addOutput(metadataOutput)
metadataOutput.setMetadataObjectsDelegate(self, queue: dispatch_get_main_queue())
metadataOutput.metadataObjectTypes = [AVMetadataObjectTypeQRCode, AVMetadataObjectTypeEAN13Code]
} else {
print("Could not add metadata output")
}
let previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession)
previewLayer.frame = self.view.layer.bounds
self.view.layer .addSublayer(previewLayer)
self.captureSession.startRunning()
} catch let error as NSError {
print("Error while creating vide input device: \(error.localizedDescription)")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {
for metadata in metadataObjects {
let readableObject = metadata as! AVMetadataMachineReadableCodeObject
let code = readableObject.stringValue
if !code.isEmpty {
self.captureSession.stopRunning()
self.dismissViewControllerAnimated(true, completion: nil)
self.delegate?.barcodeReaded(code)
}
}
}
}
When I add CGRectMake(20, 40, 200, 50)
show this
Add CGRectMake(20, 40, 500, 100)
show this
I don'n know why width and height not add up follow code.

Answer 1

Change the frame size of your AVCaptureVideoPreviewLayer:
let previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession)
previewLayer.frame = CGRectMake(10, 20, 100, 50) // something else!
If you're using autolayout, you probably don't want to deal with CALayer frames so you should create a UIView subclass, add your AVCaptureVideoPreviewLayer to that and set the layer's frame in layoutSubviews:
override func layoutSubviews() {
super.layoutSubviews()
self.previewLayer.frame = self.frame
}