IOS视频通话悬浮窗

Question

IOS视频通话，启动画中画，技术上如何实现呢，类似微信IOS悬浮窗视频通话功能

Answer 1

参考GPT和自己的思路，要实现iOS视频通话画中画功能，您需要使用iOS的内置框架AVFoundation和UIKit。以下是一些步骤和示例代码，以帮助您开始构建该功能。

1.为视频通话创建一个视图控制器，并在其中添加AVCaptureSession。

class VideoCallViewController: UIViewController {

    private let captureSession = AVCaptureSession()

    override func viewDidLoad() {
        super.viewDidLoad()
        setupCaptureSession()
    }

    private func setupCaptureSession() {
        captureSession.sessionPreset = .high

        guard let videoCaptureDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front) else { return }

        do {
            let videoInput = try AVCaptureDeviceInput(device: videoCaptureDevice)

            if captureSession.canAddInput(videoInput) {
                captureSession.addInput(videoInput)
            } else {
                print("Unable to add video input")
                return
            }

            let videoOutput = AVCaptureVideoDataOutput()
            videoOutput.setSampleBufferDelegate(self, queue: DispatchQueue(label: "videoQueue"))

            if captureSession.canAddOutput(videoOutput) {
                captureSession.addOutput(videoOutput)
            } else {
                print("Unable to add video output")
                return
            }

            let connection = videoOutput.connection(with: .video)
            connection?.videoOrientation = .portrait

        } catch let error {
            print("Error setting up capture session: \(error.localizedDescription)")
            return
        }

        let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
        previewLayer.videoGravity = .resizeAspectFill
        previewLayer.frame = view.bounds
        view.layer.insertSublayer(previewLayer, at: 0)

        captureSession.startRunning()
    }
}

2.将视频通话视图控制器中的AVCaptureSession添加到画中画控制器中。

class VideoCallViewController: UIViewController {

    // ...其他代码

    func enterPictureInPictureMode() {
        let pipController = AVPictureInPictureController(playerLayer: previewLayer)
        pipController.delegate = self
        if pipController.isPictureInPicturePossible {
            pipController.startPictureInPicture()
        }
    }
}

extension VideoCallViewController: AVPictureInPictureControllerDelegate {

    func pictureInPictureControllerDidStopPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
        // Picture in Picture did stop
    }

    func pictureInPictureControllerWillStartPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
        // Picture in Picture will start
    }

    func pictureInPictureControllerDidStartPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
        // Picture in Picture did start
    }

    func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, failedToStartPictureInPictureWithError error: Error) {
        // Picture in Picture failed to start
    }
}

3.创建一个按钮，并为其添加一个操作，使其可以激活画中画控制器

class VideoCallViewController: UIViewController {

    // ...其他代码

    override func viewDidLoad() {
        super.viewDidLoad()

        // Create the button
        let pipButton = UIButton(type: .system)
        pipButton.setTitle("Enter PiP Mode", for: .normal)
        pipButton.addTarget(self, action: #selector(enterPictureInPictureMode), for: .touchUpInside)

        // Add the button to the view
        view.addSubview(pipButton)
        pipButton.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            pipButton.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            pipButton.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: -16)
        ])
    }

    // ...其他代码
}

这样就可以在视频通话视图控制器中添加一个按钮，当用户点击该按钮时，将进入画中画模式。要退出画中画模式，用户可以点击设备上的Home键，或者点击画中画窗口中的关闭按钮。
回答不易，还请采纳!!!