当前,我们为swiftUI模态提供了一个免费的不透明白色/黑色背景。无论如何,有没有消除自由的不透明颜色并使模态视图透明的方法?
在下面的图像中,即使在呈现模态的情况下,最终结果也应该能够看到该图像。
答案 0 :(得分:2)
基于此code snippet,您可以创建viewcontroller
扩展名并修改演示文稿。
这是修改后的代码:
struct ViewControllerHolder {
weak var value: UIViewController?
init(_ value: UIViewController?) {
self.value = value
}
}
struct ViewControllerKey: EnvironmentKey {
static var defaultValue: ViewControllerHolder { return ViewControllerHolder(UIApplication.shared.windows.first?.rootViewController ) }
}
extension EnvironmentValues {
var viewController: ViewControllerHolder {
get { return self[ViewControllerKey.self] }
set { self[ViewControllerKey.self] = newValue }
}
}
extension UIViewController {
func present<Content: View>(presentationStyle: UIModalPresentationStyle = .automatic, transitionStyle: UIModalTransitionStyle = .coverVertical, animated: Bool = true, completion: @escaping () -> Void = {}, @ViewBuilder builder: () -> Content) {
let toPresent = UIHostingController(rootView: AnyView(EmptyView()))
toPresent.modalPresentationStyle = presentationStyle
toPresent.rootView = AnyView(
builder()
.environment(\.viewController, ViewControllerHolder(toPresent))
)
toPresent.view.backgroundColor = .clear // This line is modified
self.present(toPresent, animated: animated, completion: completion)
}
}
您的SwiftUI ContentView:
struct ContentView: View {
@Environment(\.viewController) private var viewControllerHolder: ViewControllerHolder
private var viewController: UIViewController? {
self.viewControllerHolder.value
}
var body: some View {
ZStack {
Color.red
Button(action: {
self.viewController?.present(builder: {
Text("OK")
})
}) {
Text("Present me!")
}
}
}
}