我正在尝试将类似目标的叠加层添加到使用
在某些设备上拍摄肖像,在其他设备上拍摄风景。我可以手动设置坐标,但是
尚未获得相机预览框架的正确坐标。

这是一个SwiftUI应用程序,所以我正在使用
UIViewControllerRepresentable。这就是我所拥有的,显然,目标圈子是
当设备和/或方向改变时,总是错误的。我似乎无法捕捉
相机预览所在的模式视图的框架。我愿意成为
能够在模态视图中指定摄像机预览的框架和位置。

struct CaptureImageView: View {
    @Binding var isShown: Bool
    @Binding var image: Image?
    @Binding var newUIImage: UIImage?
    @Binding var showSaveButton: Bool

    func makeCoordinator() -> Coordinator {
        return Coordinator(isShown: $isShown, image: $newUIImage, showSaveButton: $showSaveButton)
    }
}

extension CaptureImageView: UIViewControllerRepresentable {

    func makeUIViewController(context: UIViewControllerRepresentableContext<CaptureImageView>) -> UIImagePickerController {

        let vc = UIImagePickerController()

        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.SourceType.camera) {
            vc.sourceType = .camera
            vc.allowsEditing = true
            vc.delegate = context.coordinator

            let screenSize: CGRect = UIScreen.main.bounds
            let screenWidth = screenSize.width
            let screenHeight = screenSize.height

            vc.cameraOverlayView = CircleView(frame: CGRect(x: (screenWidth / 2) - 50, y: (screenWidth / 2) + 25, width: 100, height: 100))

            return vc
        }
        return UIImagePickerController()
    }

    func updateUIViewController(_ uiViewController: UIImagePickerController, context: UIViewControllerRepresentableContext<CaptureImageView>) {
    }
}

这是想法-但目标始终需要居中:

ios - 相机预览中的SwiftUI位置叠加-LMLPHP

和目标文件:
class CircleView: UIView {

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.backgroundColor = UIColor.clear
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func draw(_ rect: CGRect) {
        if let context = UIGraphicsGetCurrentContext() {
            context.setLineWidth(3.0)
            UIColor.red.set()

            let center = CGPoint(x: frame.size.width / 2, y: frame.size.height / 2)
            let radius = (frame.size.width - 10) / 2

            context.addArc(center: center, radius: radius, startAngle: 0.0, endAngle: .pi * 2.0, clockwise: true)
            context.strokePath()
        }
    }
}

任何指导将不胜感激。 Xcode版本11.3.1(11C504)

最佳答案

虽然我仍然想找到获取摄像机框架的方法的答案,但我的目标主要可以通过在VStack中创建一个圆形视图来实现,如下所示:

if showCaptureImageView {
    ZStack {
        CaptureImageView(isShown: $showCaptureImageView, image: $myImage, newUIImage: $newUIImage, showSaveButton: $showSaveButton)

        Circle()
            .stroke(Color.red, style: StrokeStyle(lineWidth: 10 ))
            .frame(width: 100, height: 100)
            .offset(CGSize(width: 0, height: -50.0))
    }
}//if show

关于ios - 相机预览中的SwiftUI位置叠加,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/60049894/

10-09 02:17