接到来电时截取屏幕截图

Question

我想在有人给我打电话时截取屏幕截图。问题是，当我接到来电并尝试截图时，应用程序需要自己的屏幕。我怎样才能看到屏幕？（抱歉我的英文不好）

class ViewController: UIViewController {

    private var callCenter = CTCallCenter()
    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        callCenter.callEventHandler = { (call:CTCall!) in

            switch call.callState {
            case CTCallStateConnected:
                print("CTCallStateConnected")
                self.callConnected()
            case CTCallStateDisconnected:
                print("CTCallStateDisconnected")
                self.callDisconnected()
            case CTCallStateIncoming:
                print("CTCallStateIncoming")
                self.callIncoming()
            default:
                break
            }
        }
    }

    func callIncoming(){
        captureScreen()
    }

    func callConnected(){
        captureScreen()
    }

    func callDisconnected() {
        captureScreen()
    }

    func captureScreen() {
        UIGraphicsBeginImageContextWithOptions(view.bounds.size, false, UIScreen.main.scale)
        view.layer.render(in: UIGraphicsGetCurrentContext()!)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIImageWriteToSavedPhotosAlbum(image!, nil, nil, nil)
        UIGraphicsEndImageContext()
        imageView.image = image
    }
}

Answer 1

同意@holex - 你不能。出于安全/隐私原因，iOS故意限制应用访问彼此的数据。即使有针对此的解决方法，您的应用也可能在提交时被拒绝。