ios - 如何在 SwiftUI 中运行应用程序时更改视图

Question

struct AnimationView: UIViewRepresentable {
    @Binding var cnt: Int
    var imageView: UIImageView = UIImageView(image: effctPicker(cnt: 0))
    func makeUIView(context: Self.Context) -> UIImageView {
        return imageView
    }
    func updateUIView(_ uiView: UIImageView, context: UIViewRepresentableContext<AnimationView>) {
        if self.cnt == 0{
            self.imageView.image = effctPicker(cnt: 0)
        }
        else {
            self.imageView.image = effctPicker(cnt: self.cnt)
        }
    }
}

struct ContentView: View {
    @State var count:Int = 0
    @State var audioPlayer: AVAudioPlayer!
    @State var bg: String = "bg"

    var body: some View {
                Button(action:{
                    count += 1
                    switch count
                    {
                    case 1:
                        self.bg = "bg_2"
                    default:
                        count = 0
                        self.bg = "bg"
                    }
                }, label: {
                    ZStack {
                    Image(bg)
                        .resizable()
                        AnimationView(cnt: $count)
                    }.onAppear {
                        let sound = Bundle.main.path(forResource: "freelove", ofType: "mp3")
                        self.audioPlayer = try! AVAudioPlayer(contentsOf: URL(fileURLWithPath: sound!))
                        self.audioPlayer.play()
                    }
                }
                )
    
            }
}

var springImages = [UIImage(named: "eft1")!, UIImage(named: "eft2")!,UIImage(named: "eft3")!, UIImage(named: "eft4")!]
var rainImages = [UIImage(named: "raineft_1")!, UIImage(named: "raineft_2")!,UIImage(named: "raineft_3")!]


func effctPicker(cnt : Int) ->UIImage{
    if cnt == 0{
        return UIImage.animatedImage(with: springImages, duration: 0.4)!
    }
    else {
        return UIImage.animatedImage(with: rainImages, duration: 0.4)!
    }
    
}

首先，很抱歉我的英语水平不好。这是我在stackoverflow中的第一个问题

这是我按下按钮时想要的动画视图，绑定的“cnt”将更改并且将调用 updaateUIView。但它没有奏效。我应该添加协调员吗？如果是这样，我该怎么办？

标签： iosswiftswiftuiuiviewrepresentable