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[英]SwiftUI: How to present new views on clicking ActionSheet button?
[英]How to present a View after tapping an ActionSheet.Button in SwiftUI?
我一直在玩SwiftUI,并为这个简单的东西而感到困惑。 基本上,我试图在点击ActionSheet.Button
之后触发模式。 到目前为止,这是我的代码:
struct SomePage: View {
@State var showSheet = false
var body: some View {
Button(action: {
self.showSheet = true
}) {
Text("Show ation sheet")
}.presentation(sheet)
}
private var sheet: ActionSheet? {
let button = ActionSheet.Button.default(Text("Button") {
self.showSheet = false
// what now??
}
let action = ActionSheet(title: Text("Title"),
message: nil,
buttons: [button])
return showSheet ? action : nil
}
// This is the modal I'm trying to present
// after tapping on the action sheet button
private var modal: Modal {
return Modal(SomePage())
}
}
我尝试将第二个presentation
处理程序添加到按钮并切换showModal
属性,但是显然调试器抱怨在第一个模式表示仍在显示时尝试第二个模式表示。
有人对如何进行这项工作有想法吗?
您离它并不远。
添加另一个@State
来处理模式的表示。
struct ContentView: View {
@State var showSheet = false
@State var showModal = false
var body: some View {
Button(action: {
self.showSheet = true
}) {
Text("Show action sheet")
}
.actionSheet(isPresented: $showSheet, content: actionSheet)
.sheet(isPresented: $showModal, content: { Text("Modal") })
}
private func actionSheet() -> ActionSheet {
let button = ActionSheet.Button.default(Text("Show modal")) {
self.showSheet = false
self.showModal = true
}
let actionSheet = ActionSheet(title: Text("Action Sheet"),
message: nil,
buttons: [button])
return actionSheet
}
}
结果 :
更新了Xcode 11 beta 5
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