功能：想给输入键盘加一个toolbar. 并且在点击时收起键盘 需要用到@FocusState。
struct ContentView: View {
@State private var name = "Taylor"
@FocusState private var isFocused: Bool
var body: some View {
TextField("Enter your name", text: $name)
.textFieldStyle(.roundedBorder)
.focused($isFocused)
.toolbar {
ToolbarItemGroup(placement: .keyboard) {
Spacer()
Button("Done") {
print("Done")
isFocused = false
}
}
}
}
}
