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| 1 | +// |
| 2 | +// CameraPreview.swift |
| 3 | +// damus |
| 4 | +// |
| 5 | +// Created by Suhail Saqan on 8/5/23. |
| 6 | +// |
| 7 | + |
| 8 | +import UIKit |
| 9 | +import AVFoundation |
| 10 | +import SwiftUI |
| 11 | + |
| 12 | +public struct CameraPreview: UIViewRepresentable { |
| 13 | + public class VideoPreviewView: UIView { |
| 14 | + public override class var layerClass: AnyClass { |
| 15 | + AVCaptureVideoPreviewLayer.self |
| 16 | + } |
| 17 | + |
| 18 | + var videoPreviewLayer: AVCaptureVideoPreviewLayer { |
| 19 | + return layer as! AVCaptureVideoPreviewLayer |
| 20 | + } |
| 21 | + |
| 22 | + let focusView: UIView = { |
| 23 | + let focusView = UIView(frame: CGRect(x: 0, y: 0, width: 30, height: 30)) |
| 24 | + focusView.layer.borderColor = UIColor.white.cgColor |
| 25 | + focusView.layer.borderWidth = 1.5 |
| 26 | + focusView.layer.cornerRadius = 15 |
| 27 | + focusView.layer.opacity = 0 |
| 28 | + focusView.backgroundColor = .clear |
| 29 | + return focusView |
| 30 | + }() |
| 31 | + |
| 32 | + @objc func focusAndExposeTap(gestureRecognizer: UITapGestureRecognizer) { |
| 33 | + let layerPoint = gestureRecognizer.location(in: gestureRecognizer.view) |
| 34 | + |
| 35 | + guard layerPoint.x >= 0 && layerPoint.x <= bounds.width && |
| 36 | + layerPoint.y >= 0 && layerPoint.y <= bounds.height else { |
| 37 | + return |
| 38 | + } |
| 39 | + |
| 40 | + let devicePoint = videoPreviewLayer.captureDevicePointConverted(fromLayerPoint: layerPoint) |
| 41 | + |
| 42 | + self.focusView.layer.frame = CGRect(origin: layerPoint, size: CGSize(width: 30, height: 30)) |
| 43 | + |
| 44 | + NotificationCenter.default.post(.init(name: .init("UserDidRequestNewFocusPoint"), object: nil, userInfo: ["devicePoint": devicePoint] as [AnyHashable: Any])) |
| 45 | + |
| 46 | + UIView.animate(withDuration: 0.3, animations: { |
| 47 | + self.focusView.layer.opacity = 1 |
| 48 | + }) { (completed) in |
| 49 | + if completed { |
| 50 | + UIView.animate(withDuration: 0.3) { |
| 51 | + self.focusView.layer.opacity = 0 |
| 52 | + } |
| 53 | + } |
| 54 | + } |
| 55 | + } |
| 56 | + |
| 57 | + public override func layoutSubviews() { |
| 58 | + super.layoutSubviews() |
| 59 | + |
| 60 | + videoPreviewLayer.videoGravity = .resizeAspectFill |
| 61 | + |
| 62 | + self.layer.addSublayer(focusView.layer) |
| 63 | + |
| 64 | + let gRecognizer = UITapGestureRecognizer(target: self, action: #selector(VideoPreviewView.focusAndExposeTap(gestureRecognizer:))) |
| 65 | + self.addGestureRecognizer(gRecognizer) |
| 66 | + } |
| 67 | + } |
| 68 | + |
| 69 | + public let session: AVCaptureSession |
| 70 | + |
| 71 | + public init(session: AVCaptureSession) { |
| 72 | + self.session = session |
| 73 | + } |
| 74 | + |
| 75 | + public func makeUIView(context: Context) -> VideoPreviewView { |
| 76 | + let viewFinder = VideoPreviewView() |
| 77 | + viewFinder.backgroundColor = .black |
| 78 | + viewFinder.videoPreviewLayer.cornerRadius = 20 |
| 79 | + viewFinder.videoPreviewLayer.session = session |
| 80 | + viewFinder.videoPreviewLayer.connection?.videoOrientation = .portrait |
| 81 | + |
| 82 | + return viewFinder |
| 83 | + } |
| 84 | + |
| 85 | + public func updateUIView(_ uiView: VideoPreviewView, context: Context) { |
| 86 | + |
| 87 | + } |
| 88 | +} |
| 89 | + |
| 90 | +struct CameraPreview_Previews: PreviewProvider { |
| 91 | + static var previews: some View { |
| 92 | + CameraPreview(session: AVCaptureSession()) |
| 93 | + .frame(height: 300) |
| 94 | + } |
| 95 | +} |
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