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swift - SwiftUI AspectRatio 不适用于来自相机的图像

问题描述

我不确定这是否是 SwiftUI 特定的问题。无论如何，我有一个 UIImagePickerController，我使用 UIViewControllerRepresentableProtocol 在 SwiftUI 视图中实现了它：

struct ContentView: View {

@State var showCameraView = false
@State var showImagePicker = false
@State var UserImage = Image("user")

var body: some View {
    VStack {
        UserImage
            .resizable()
            .frame(width: 200, height: 200)
            .scaledToFit()
            .background(Color.gray)
            .cornerRadius(200)
            .clipped()
        Button(action: {self.showImagePicker = true}) {
            Text("Choose from camera roll")
        }
            .padding(.top, 10)
    }
        .sheet(isPresented: $showImagePicker) {
            ImagePicker(showImagePicker: self.$showImagePicker, pickedImage: self.$UserImage)
            }

}

}

struct ImagePicker: UIViewControllerRepresentable {

@Binding var showImagePicker: Bool
@Binding var pickedImage: Image

func makeCoordinator() -> ImagePicker.Coordinator {
    Coordinator(self)
}

func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
    let imagePicker = UIImagePickerController()
    imagePicker.delegate = context.coordinator
    return imagePicker
}

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

class Coordinator: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    var parent: ImagePicker

    init(_ imagePicker: ImagePicker) {
        self.parent = imagePicker
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        let uiImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
        parent.pickedImage = Image(uiImage: uiImage)
        parent.showImagePicker = false
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        parent.showImagePicker = false
    }
}

}

选择不是由设备相机拍摄的图像时，它可以正常工作。但是，每次我选择相机本身拍摄的图像时，似乎都没有应用 .aspectRatio 修饰符，因为在这种情况下加载的图像的尺寸会失真。有人发现我的代码有问题或知道解决方案吗？

标签： swiftxcodeuikituiimagepickercontrollerswiftui

解决方案

有同样的问题。我使用了@ninjahamster 提出的修改版本，我根本没有调整图像大小。欢迎任何其他解决方案。

    func resizeImage(image: UIImage) -> UIImage {
        let width = image.size.width
        let height = image.size.height
        UIGraphicsBeginImageContext(CGSize(width: width, height: height))
        image.draw(in: CGRect(x: 0, y: 0, width: width, height: height))
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return newImage!
    }

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