Use overlay
带动画
父视图
struct ContentView: View {
@State var isShowSheet: Bool = false
var body: some View {
VStack{
Button("Show Sheet") {
withAnimation {
isShowSheet.toggle()
}
}
}
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
.overlay(isShowSheet ? FullScreen(isShowSheet: $isShowSheet.animation()) : nil)
}
}
全屏视图
struct FullScreen: View {
@Binding var isShowSheet: Bool
var body: some View {
Color.blue
.transition(.move(edge: .leading))
.onTapGesture {
isShowSheet = false
}
.edgesIgnoringSafeArea(.all)
}
}
The 第二个选择就是使用带有自定义动画的UIViewController。
我已经使用此链接中的 viewController Holder 扩展(//https://stackoverflow.com/a/58494173/14733292 https://stackoverflow.com/a/58494173/14733292)并添加CATransition()
struct ViewControllerHolder {
weak var value: UIViewController?
}
struct ViewControllerKey: EnvironmentKey {
static var defaultValue: ViewControllerHolder {
return ViewControllerHolder(value: UIApplication.shared.windows.first?.rootViewController)
}
}
extension EnvironmentValues {
var viewController: UIViewController? {
get { return self[ViewControllerKey.self].value }
set { self[ViewControllerKey.self].value = newValue }
}
}
extension UIViewController {
func present<Content: View>(style: UIModalPresentationStyle = .automatic, @ViewBuilder builder: () -> Content) {
let toPresent = UIHostingController(rootView: AnyView(EmptyView()))
toPresent.modalPresentationStyle = style
toPresent.rootView = AnyView(
builder()
.environment(\.viewController, toPresent)
)
self.presentController(toPresent)
}
func presentController(_ viewControllerToPresent: UIViewController) {
let transition = CATransition()
transition.duration = 0.25
transition.type = CATransitionType.push
transition.subtype = CATransitionSubtype.fromLeft
self.view.window?.layer.add(transition, forKey: kCATransition)
present(viewControllerToPresent, animated: false)
}
func dismissController() {
let transition = CATransition()
transition.duration = 0.25
transition.type = CATransitionType.push
transition.subtype = CATransitionSubtype.fromRight
self.view.window?.layer.add(transition, forKey: kCATransition)
dismiss(animated: false)
}
}
内容视图和全屏
struct ContentView: View {
@Environment(\.viewController) private var viewControllerHolder: UIViewController?
var body: some View {
VStack{
Button("Show Sheet") {
viewControllerHolder?.present(style: .overFullScreen, builder: {
FullScreen()
})
}
}
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
}
}
struct FullScreen: View {
@Environment(\.viewController) private var viewControllerHolder: UIViewController?
var body: some View {
Color.blue
.onTapGesture {
viewControllerHolder?.dismissController()
}
.edgesIgnoringSafeArea(.all)
}
}