UIViewRepresentable 中的 ImageAnalysisInteraction 无法正常工作

Question

我有一个用于实时文本功能 ( ImageAnalysisInteraction ) 的简单UIViewRepresentable包装器。 在我开始更新updateUIView(...) function 中的UIImage之前，它一直没有问题。

我一直在控制台中看到源自此视图的此错误： [api] -[CIImage initWithCVPixelBuffer:options:] failed because the buffer is nil.

当我更改图像时，它会正确更新，但selectableItemsHighlighted叠加层保持不变，我仍然可以 select 旧图像的文本（即使它不再可见）。

import UIKit
import SwiftUI
import VisionKit


@MainActor
struct LiveTextInteraction: UIViewRepresentable {
    @Binding var image: UIImage
    let interaction = ImageAnalysisInteraction()
    let imageView = LiveTextImageView()
    let analyzer = ImageAnalyzer()
    let configuration = ImageAnalyzer.Configuration([.text])
    
    
    func makeUIView(context: Context) -> UIImageView {
        interaction.setSupplementaryInterfaceHidden(true, animated: true)
        imageView.image = image
        imageView.addInteraction(interaction)
        imageView.contentMode = .scaleAspectFit
        return imageView
    }
    
    
    func updateUIView(_ uiView: UIImageView, context: Context) {
        Task {
            uiView.image = image
            do {
                if let image = uiView.image {
                    let analysis = try await analyzer.analyze(image, configuration: configuration)
                    interaction.analysis = analysis;
                    interaction.preferredInteractionTypes = .textSelection
                    interaction.selectableItemsHighlighted = true
                    interaction.setContentsRectNeedsUpdate()
                }
            } catch {
                // catch
            }
        }
        
    }
}


class LiveTextImageView: UIImageView {
    // Use intrinsicContentSize to change the default image size
    // so that we can change the size in our SwiftUI View
    override var intrinsicContentSize: CGSize {
        .zero
    }
}

我在这里做错了什么？

Answer 1

它看起来像一个错误。 尝试使用调度

let highlighted = interaction.selectableItemsHighlighted
interaction.analysis = analysis // highlighted == false
if highlighted
{
    DispatchQueue.main.async
    {
        interaction.selectableItemsHighlighted = highlighted
    }
}

如果将交互添加到 UIImageView，则不需要interaction.setContentsRectNeedsUpdate()