Question

我需要在横向上修复屏幕捕获但是这个我的代码无法修复大小屏幕捕获遵循代码＆gt; previewLayer.frame = CGRectMake（20,40,500,100）。
请参阅此屏幕下方的图片与 CGRectMake（20,40,50,100）不匹配。

This is small size not match follow code(CGRectMake(20, 40, 500, 100))

请让我的想法或示例代码自定义尺寸，谢谢。

这个代码

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 = CGRectMake(20, 40, 500, 100)
            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)
            }
        }
    }

}

Answer 1

在viewDidAppear或viewWillLayoutSubview

中设置预览图层框

我无法使用此代码修复大小AVcapture

1 个答案: