在 SwiftUI 中以编程方式循环播放 iOS 实时照片

问题描述

我希望能够循环播放实时照片,以便连续播放。

到目前为止,我正在尝试使用 PHLivePhotoViewDelegate 来完成此操作。

import Foundation
import SwiftUI
import PhotosUI
import iOSShared

struct LiveImageView: UIViewRepresentable {
    let view: PHLivePhotoView
    let model:LiveImageviewmodel?
    let delegate = LiveImageLargeMediaDelegate()
    
    init(fileGroupUUID: UUID) {
        let view = PHLivePhotoView()
        // Without this,in landscape mode,I don't get proper scaling of the image.
        view.contentMode = .scaleAspectFit
        
        self.view = view
        
        // Using this to replay live image repeatedly.
        view.delegate = delegate
        
        model = LiveImageviewmodel(fileGroupUUID: fileGroupUUID)
        
        guard let model = model else {
            return
        }
        
        model.getLivePhoto(previewImage: nil) { livePhoto in
            view.livePhoto = livePhoto
        }
    }
    
    func makeUIView(context: Context) -> UIView {
        return view
    }
    
    func updateUIView(_ uiView: UIView,context: Context) {
        guard let model = model else {
            return
        }
        
        guard !model.started else {
            return
        }
        
        model.started = true
        view.startPlayback(with: .full)
    }
}

class LiveImageLargeMediaDelegate: NSObject,PHLivePhotoViewDelegate {
    func livePhotoView(_ livePhotoView: PHLivePhotoView,didEndplaybackWith playbackStyle: PHLivePhotoViewPlaybackStyle) {
        livePhotoView.stopPlayback()
        dispatchQueue.main.asyncAfter(deadline: .Now() + .milliseconds(200)) {
            livePhotoView.startPlayback(with: .full)
        }
    }
}

但没有完全成功。似乎音频确实再次播放,但不是视频。 livePhotoView.stopPlayback 和异步方面只是我尝试的其他更改。我也试过没有这些。

请注意,我不希望用户必须手动更改实时照片(例如,请参阅 NSPredicate to not include Loop and Bounce Live Photos)。

想法?

解决方法

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