将图像和文本添加到操作表的警报按钮

Question

我希望能够向 AlertButton 添加图标和文本，但类型是类型 Text?

struct NavigationAddItem: View {
    @State var showActionView = true

    var actionSheet: ActionSheet {
        ActionSheet(title: Text("Select an action"), message: nil, buttons: [
            .default(Text("Option A"), action: {
                // TODO: Enter Option A action
            }),
            .default(Text("Option B"), action: {
                // TODO: Enter Option B action
            }),
            .cancel()
        ])
    }

    var body: some View {
        Button(action: {
            self.showActionView.toggle()
        }) {
            Image(systemName: "plus")
                .font(.system(size: 24))
        }
        .actionSheet(isPresented: $showActionView, content: {
            self.actionSheet
        })
    }
}


struct NavigationItems_Previews: PreviewProvider {
    static var previews: some View {
        NavigationAddItem(showActionView: true)
    }
}

此代码提供了操作表，但我想在文本左侧添加一个图像。

当前的：

通缉：

Answer 1

我认为目前不可能在 ActionSheet 中为按钮定义自己的视图。

查看代码ActionSheet我们可以看到以下内容：

@available(iOS 13.0, tvOS 13.0, watchOS 6.0, *)
@available(OSX, unavailable)
public struct ActionSheet {

    /// Creates an action sheet with the provided buttons.
    public init(title: Text, message: Text? = nil, buttons: [ActionSheet.Button] = [.cancel()])

    /// A button representing an operation of an action sheet presentation.
    public typealias Button = Alert.Button
}

这表明Button使用的ActionSheet被类型化为Alert.Button

如果我们查看结构体，Alert我们可以看到以下方法：

/// A storage type for an alert presentation.
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
public struct Alert {

    /// Creates an alert with one button.
    public init(title: Text, message: Text? = nil, dismissButton: Alert.Button? = nil)

    /// Creates an alert with two buttons.
    ///
    /// - Note: the system determines the visual ordering of the buttons.
    public init(title: Text, message: Text? = nil, primaryButton: Alert.Button, secondaryButton: Alert.Button)

    /// A button representing an operation of an alert presentation.
    public struct Button {

        /// Creates an `Alert.Button` with the default style.
        public static func `default`(_ label: Text, action: (() -> Void)? = {}) -> Alert.Button

        /// Creates an `Alert.Button` that indicates cancellation of some
        /// operation.
        public static func cancel(_ label: Text, action: (() -> Void)? = {}) -> Alert.Button

        /// Creates an `Alert.Button` that indicates cancellation of some
        /// operation.
        ///
        /// - Note: the label of the button is automatically chosen by the
        /// system for the appropriate locale.
        public static func cancel(_ action: (() -> Void)? = {}) -> Alert.Button

        /// Creates an `Alert.Button` with a style indicating destruction of
        /// some data.
        public static func destructive(_ label: Text, action: (() -> Void)? = {}) -> Alert.Button
    }
}

请注意，创建 的每个函数Alert.Button是：default、cancel和destructive，仅采用类型标签Text和action类型标签(() -> Void)?。这意味着您只能传递符合Text.

Text因此，正如您已经发现的那样，尝试传递不符合的视图是行不通的。