如何防止工作表在 SwiftUI 中使其后面的视图变暗或删除不必要的填充？答案

【问题标题】：How do I prevent a sheet from darkening the view behind it in SwiftUI or remove the unnecessary padding?如何防止工作表在 SwiftUI 中使其后面的视图变暗或删除不必要的填充？
【发布时间】：2020-10-08 00:31:05
【问题描述】：

当一个工作表（模态）出现时，它后面的视图会缩小并变暗，导致工作表后面出现一个灰色的矩形（见图中红色框内的位）。如何防止背景中的视图变暗，或者在它缩小时消除它周围的白色填充？

【问题讨论】：

标签： swiftui

【解决方案1】：

这是默认的.sheet 行为。

使用 SwiftUI 2.0 改为使用全屏覆盖

@available(iOS 14.0, tvOS 14.0, watchOS 7.0, *)
@available(macOS, unavailable)
extension View {

    /// Presents a modal view that covers as much of the screen as
    /// possible using the given item as a data source for the sheet's content.
    ///
    /// - Parameters:
    ///   - item: A binding to an optional source of truth for the cover
    ///     modal view. When representing a non-nil item, the system uses
    ///     `content` to create a modal representation of the item.
    ///     If the identity of `item` changes, the system will dismiss a
    ///     currently-presented modal view and replace it by a new modal view.
    ///   - onDismiss: A closure executed when the modal view dismisses.
    ///   - content: A closure returning the content of the modal view.
    public func fullScreenCover<Item, Content>(item: Binding<Item?>, onDismiss: (() -> Void)? = nil, @ViewBuilder content: @escaping (Item) -> Content) -> some View where Item : Identifiable, Content : View


    /// Presents a modal view that covers as much of the screen as
    /// possible when a given condition is true.
    ///
    /// - Parameters:
    ///   - isPresented: A binding to whether the modal view is presented.
    ///   - onDismiss: A closure executed when the modal view dismisses.
    ///   - content: A closure returning the content of the modal view.
    public func fullScreenCover<Content>(isPresented: Binding<Bool>, onDismiss: (() -> Void)? = nil, @ViewBuilder content: @escaping () -> Content) -> some View where Content : View

}

对于 SwiftUI 1.0，您可以使用过渡来全屏显示您的视图，请参阅 https://stackoverflow.com/a/61446820/12299030 中的示例

【讨论】：

感谢您的快速回复！那么您是说除非全屏显示工作表，否则无法修改此默认行为？