7
के लिए रोटेशन अक्षम करें मेरे पास UITabBarController है जिसमें 4 आइटम टैब हैं। उनमें से एक AvCaptureVideoPreviewLayer है (एक बारकोड स्कैनर है)। मैं क्या करना चाहता हूं केवल AVCaptureVideoPreviewLayer (आईओएस कैमरा ऐप की तरह) के लिए ऑटोरोटेट को अक्षम करना है, लेकिन item bar के लिए नहीं, जो स्क्रीन के साथ घुमाएगा। यह एक कठिन परिस्थिति है क्योंकि मुझे लगता है कि UITabBarConrtoller आपको रोटेशन को आसानी से अक्षम करने की अनुमति नहीं देता है।केवल AVCaptureVideoPreviewLayer
कोड मेरे कैमरे को देखने के लिए है:
import UIKit
import AVFoundation
class ScannerViewController: UIViewController,
// MARK: Properties
/// Manages the data flow from the capture stage through our input devices.
var captureSession: AVCaptureSession!
/// Dispays the data as captured from our input device.
var previewLayer: AVCaptureVideoPreviewLayer!
// MARK: Methods
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.blackColor()
self.captureSession = AVCaptureSession()
// This object represents a physical capture device and the properties associated with that device
let videoCaptureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
// Is useful for capturing the data from the input device
let videoInput: AVCaptureDeviceInput
do {
videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice)
} catch {
// TODO: maybe show an alert
return
}
if (self.captureSession.canAddInput(videoInput)) {
self.captureSession.addInput(videoInput)
} else {
failed();
return;
}
let metadataOutput = AVCaptureMetadataOutput()
if (self.captureSession.canAddOutput(metadataOutput)) {
self.captureSession.addOutput(metadataOutput)
metadataOutput.setMetadataObjectsDelegate(self, queue: dispatch_get_main_queue())
metadataOutput.metadataObjectTypes = [AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypePDF417Code,
AVMetadataObjectTypeUPCECode, AVMetadataObjectTypeCode39Code,
AVMetadataObjectTypeCode39Mod43Code, AVMetadataObjectTypeCode93Code,
AVMetadataObjectTypeCode128Code]
} else {
failed()
return
}
// Adds the preview layer to display the captured data. Sets the videoGravity to AspectFill so that it covers the full screen
self.previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession);
self.previewLayer.frame = self.view.layer.bounds;
self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
self.view.layer.addSublayer(previewLayer);
self.captureSession.startRunning();
}
override func viewDidLayoutSubviews() {
self.previewLayer?.frame = self.view.layer.bounds;
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
if (self.captureSession.running == false) {
self.captureSession.startRunning();
}
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
if (self.captureSession.running == true) {
self.captureSession.stopRunning();
}
}
func failed() {
let ac = UIAlertController(title: "Scanning not supported", message: "Your device does not support scanning a code from an item. Please use a device with a camera.", preferredStyle: .Alert)
ac.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
presentViewController(ac, animated: true, completion: nil)
self.captureSession = nil
}
func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {
self.captureSession.stopRunning()
if let metadataObject = metadataObjects.first {
let readableObject = metadataObject as! AVMetadataMachineReadableCodeObject;
AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate))
foundCode(readableObject.stringValue);
}
}
/// Completes some tasks when a barcode is found.
///
/// - parameter code: The the barcode found.
func foundCode(code: String) {
}
}
अच्छा! यह मेरी मदद की –