Swiftui 向每个操作表按钮添加不同的修改器

这可能是一个很简单的问题，但我找不到答案

我正在尝试构建一个包含两个按钮（以及一个取消按钮）的操作表：

按钮“从库中选择”打开一个

图像选择器

，其中

源类型

设置为

.photoLibrary

按钮“拍摄新照片”打开一个

图像采集器

，其中

源类型

设置为

.camera

我已经成功制作了ActionSheet和imagePicker，但无法确定在何处添加修改器来告诉每个按钮应该使用哪个sourceType。我设法将它添加到动作表之外的一个

sheet（）

修改器中的一个普通按钮中，如下所示，一切正常：

Button(action: {
                            self.show.toggle()
                        })
                        {Text("Take a new picture")}
                        .sheet(isPresented: self.$show, content: {
                            ImagePicker(sourceType: .camera, show: self.$show, image: self.$imageTemp)
                        })

但是，我看不出在行动表中的什么地方包含这些信息。非常感谢任何能提供帮助的人，我希望这一点是明确的：-）

这是我的密码：

struct ContentView: View {

@State private var showingActionSheet = false
@State var imageTemp : Data = (UIImage(systemName: "photo.on.rectangle.angled")?.jpegData(compressionQuality: 1))!

var body: some View {
        NavigationView {
Image(uiImage: UIImage(data: imageTemp)!)
                        .onTapGesture {
                                        self.showingActionSheet = true
                                    }
                        .actionSheet(isPresented: $showingActionSheet) {
                            ActionSheet(title: Text("Image selector"), message: Text("Select an image"), buttons: [
                                .default(Text("Select from Gallery"))
                                    {
                                        self.show.toggle()
                                    },
                                .default(Text("Take new picture")) {
                                    self.show.toggle()
                                },
                                .cancel()
                            ]
                            )
                        }
                 }
         }
}

为了以防万一，这里是我的imagePicker的代码，尽管我认为这可能不是必需的

struct ImagePicker: UIViewControllerRepresentable {
    var sourceType: UIImagePickerController.SourceType = .photoLibrary
    
    @Binding var show: Bool
    @Binding var image: Data
    
    func makeCoordinator() -> ImagePicker.Coordinator {
        let imagePicker = UIImagePickerController()
        return ImagePicker.Coordinator(child1: self)
    }
    
    func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
        let picker = UIImagePickerController()
        picker.delegate = context.coordinator
        picker.sourceType = sourceType
        return picker
    }

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

    }
    
    class Coordinator: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
        var child : ImagePicker
        init(child1: ImagePicker) {
            child = child1
        }
    
    
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        self.child.show.toggle()
    }
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
        let image = info[.originalImage]as! UIImage
        let data = image.jpegData(compressionQuality: 0.45)
        self.child.image = data!
        self.child.show.toggle()
    }
}
}

struct ImagePicker:UIViewControllerRepresentable{
变量sourceType:UIImagePickerController.sourceType=.photoLibrary
@绑定变量显示：Bool
@绑定var映像：数据
func makeCoordinator（）->ImagePicker.Coordinator{
让imagePicker=UIImagePickerController（）
返回图像选择器协调器（child1:self）
}
func makeUIViewController（上下文：UIViewControllerRepresentableContext）->UIImagePickerController{
让picker=UIImagePickerController（）
picker.delegate=context.coordinator
picker.sourceType=sourceType
回程选择器
}
func updateUIViewController（uViewController:UIImagePickerController，上下文：UIViewControllerRepresentableContext）{
}
类协调器：NSObject、UIImagePickerControllerDelegate、UINavigationControllerDelegate{
var子对象：图像选择器
初始化（child1:ImagePicker）{
child=child1
}
func ImagePickerController IDCancel（picker:UIImagePickerController）{
self.child.show.toggle（）
}
func imagePickerController（picker:UIImagePickerController，didFinishPickingMediaWithInfo:[UIImagePickerController.InfoKey:Any]）{
将image=info[.originalImage]设为！UIImage
让数据=image.jpegData（压缩质量：0.45）
self.child.image=数据！
self.child.show.toggle（）
}
}
}

您的问题可以归结为“我如何才能呈现多张工作表？”，因此可能会有所帮助

定义新的

enum

以包含可能的图纸类型（图库/拍照）

声明一个

@State

属性以保存当前图纸类型。它是可选的，因为当它为零时，将不会显示任何工作表

将属性设置为所需的类型

使用而不是<代码>isPresented最适合静态图纸<代码>项目适用于您需要的多种图纸类型

您还需要修改

图像选择器

，以便

绑定

接收

照片类型

，而不是

Bool

。要关闭工作表，只需将

showingType

设置为nil

struct ImagePicker: UIViewControllerRepresentable {
    var sourceType: UIImagePickerController.SourceType = .photoLibrary
    
    @Binding var showingType: PhotoSheetType?
    @Binding var image: Data
    
    func makeCoordinator() -> ImagePicker.Coordinator {
        let imagePicker = UIImagePickerController()
        return ImagePicker.Coordinator(child1: self)
    }
    
    func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
        let picker = UIImagePickerController()
        picker.delegate = context.coordinator
        picker.sourceType = sourceType
        return picker
    }
    
    func updateUIViewController(_ uiViewController: UIImagePickerController, context: UIViewControllerRepresentableContext<ImagePicker>) {
        
    }
    
    class Coordinator: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
        var child : ImagePicker
        init(child1: ImagePicker) {
            child = child1
        }
        
        
        func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
            self.child.showingType = nil /// set to nil here
        }
        
        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
            let image = info[.originalImage] as! UIImage
            let data = image.jpegData(compressionQuality: 0.45)
            self.child.image = data!
            self.child.showingType = nil /// set to nil here
        }
    }
}

struct ImagePicker:UIViewControllerRepresentable{
变量sourceType:UIImagePickerController.sourceType=.photoLibrary
@绑定变量showingType:photosheetype？
@绑定var映像：数据
func makeCoordinator（）->ImagePicker.Coordinator{
让imagePicker=UIImagePickerController（）
返回图像选择器协调器（child1:self）
}
func makeUIViewController（上下文：UIViewControllerRepresentableContext）->UIImagePickerController{
让picker=UIImagePickerController（）
picker.delegate=context.coordinator
picker.sourceType=sourceType
回程选择器
}
func updateUIViewController（uViewController:UIImagePickerController，上下文：UIViewControllerRepresentableContext）{
}
类协调器：NSObject、UIImagePickerControllerDelegate、UINavigationControllerDelegate{
var子对象：图像选择器
初始化（child1:ImagePicker）{
child=child1
}
func ImagePickerController IDCancel（picker:UIImagePickerController）{
self.child.showingType=nil///此处设置为nil
}
func imagePickerController（picker:UIImagePickerController，didFinishPickingMediaWithInfo:[UIImagePickerController.InfoKey:Any]）{
将image=info[.originalImage]设为！UIImage
让数据=image.jpegData（压缩质量：0.45）
self.child.image=数据！
self.child.showingType=nil///此处设置为nil
}
}
}

这是一个很棒的答案！非常清楚，解释得很好。你也是对的，它与另一个问题类似，我认为将代码放在操作表中让我感到有点困惑。唯一的问题是，当我尝试它时，我在控制台上得到一条消息，“应用程序试图以模态方式呈现一个已经由呈现的视图控制器”。看起来某个地方的“showingActionSheet”太多了，但我太新手了，看不清确切的位置。@FPL上面的代码是否会出现此消息？当我测试它时，问题可能在代码的其他地方。你是对的，我在其他地方发现了错误。非常感谢！

struct ImagePicker: UIViewControllerRepresentable {
    var sourceType: UIImagePickerController.SourceType = .photoLibrary
    
    @Binding var showingType: PhotoSheetType?
    @Binding var image: Data
    
    func makeCoordinator() -> ImagePicker.Coordinator {
        let imagePicker = UIImagePickerController()
        return ImagePicker.Coordinator(child1: self)
    }
    
    func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
        let picker = UIImagePickerController()
        picker.delegate = context.coordinator
        picker.sourceType = sourceType
        return picker
    }
    
    func updateUIViewController(_ uiViewController: UIImagePickerController, context: UIViewControllerRepresentableContext<ImagePicker>) {
        
    }
    
    class Coordinator: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
        var child : ImagePicker
        init(child1: ImagePicker) {
            child = child1
        }
        
        
        func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
            self.child.showingType = nil /// set to nil here
        }
        
        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {
            let image = info[.originalImage] as! UIImage
            let data = image.jpegData(compressionQuality: 0.45)
            self.child.image = data!
            self.child.showingType = nil /// set to nil here
        }
    }
}